JP6846030B2 - Wire grid and wire grid manufacturing method - Google Patents

Description

The present invention relates to a wire grid that controls the polarization of a terahertz wave as an incident wave, and a method for manufacturing the wire grid.

The laminated wire grid described in Patent Document 1 includes a first wire grid portion and a second wire grid portion laminated on the first wire grid portion. The first wire grid portion is formed by arranging a plurality of first wires arranged parallel to each other in the first frame body. On the other hand, the second wire grid portion is formed by arranging a plurality of second wires arranged parallel to each other in the second frame. Therefore, the first wire grid portion and the second wire grid portion are formed as separate members. Then, the first wire grid portion and the second wire grid portion are positioned so that the first wire and the second wire do not come into contact with each other and have a predetermined interval. Further, after positioning, the first wire grid portion and the second wire grid portion are fixed.

Japanese Unexamined Patent Publication No. 2014-74824

An object of the present invention is to provide a wire grid which has a plurality of wire grid portions and can be easily manufactured, and a method for manufacturing the wire grid.

According to one aspect of the invention, the wire grid controls the polarization of the terahertz wave as the incident wave. The wire grid includes a first wire grid portion, a second wire grid portion, and a pair of spacers. The first wire grid portion includes a plurality of first wires. The second wire grid portion includes a plurality of second wires. The pair of spacers are arranged between the first wire grid portion and the second wire grid portion. The plurality of first wires are arranged along one direction at predetermined intervals shorter than the wavelength of the terahertz wave. The plurality of second wires are arranged along the one direction at the predetermined intervals. The first wire and the second wire are alternately located. The pair of spacers extend along the one direction and are spaced apart from each other along the direction intersecting the one direction.

In the wire grid of the present invention, each of the spacers preferably has a linear shape or a strip shape.

In the wire grid of the present invention, each of the spacers is preferably a metal or a synthetic resin.

In the wire grid of the present invention, the thickness of each of the spacers is preferably 2 times or less the diameter of the first wire.

According to another aspect of the present invention, the method of manufacturing a wire grid manufactures a wire grid that controls the polarization of a terahertz wave as an incident wave. The method for manufacturing the wire grid is as follows: between the first preparation step of preparing the first frame, the first wire grid portion including the plurality of first wires, and the second wire grid portion including the plurality of second wires. A forming step of forming the first wire grid portion and the second wire grid portion in the first frame body is included so that the pair of first spacers are arranged. In the forming step, the plurality of first wires are arranged along one direction at predetermined intervals shorter than the wavelength of the terahertz wave so that the first wire and the second wire are alternately positioned. , The plurality of second wires are arranged along the one direction at the predetermined intervals, and the pair of first spacers are extended along the one direction along the direction intersecting the one direction. Place them at intervals from each other.

In the method for manufacturing a wire grid of the present invention, the forming step involves winding a wire material around the first frame body a plurality of times to form the first wire grid portion and the second wire grid portion. It is preferable to include it. In the winding step, the wire material intersects the pair of first spacers, and the wire portions of the wire material arranged along the one direction are on one side and the other side with respect to the pair of first spacers. It is preferable to pass the pair of first spacers between the wire portions adjacent to each other so as to be alternately positioned on the side. Of the plurality of wire portions, it is preferable that the plurality of wire portions located on one side of the plurality of wire portions each constitute the plurality of first wires. Of the plurality of wire portions, it is preferable that the plurality of wire portions located on the other side each form the plurality of second wires.

The method for manufacturing a wire grid of the present invention further comprises a second preparatory step of preparing a second frame body and a laminating step of laminating the first frame body and the second frame body to form a laminated body. It is preferable to include it. In the forming step, the wire material is wound around the laminated body a plurality of times to form the first wire grid portion and the second wire grid portion in the first frame body, and the third wire grid and the fourth wire. It is preferable to include a winding step of forming the grid on the second frame. In the winding step, the wire material intersects the pair of first spacers arranged in the first frame body, and the wire is arranged in the first frame body along the one direction of the wire material. The pair of first spacers is passed between the adjacent wire portions so that the portions are alternately located on one side and the other side with respect to the pair of first spacers, and the wire material is formed by the first wire material. A wire portion that intersects a pair of second spacers arranged in the two frames and is arranged in the second frame along the one direction of the wire material is on one side of the pair of second spacers. It is preferable to pass the pair of second spacers between the wire portions adjacent to each other so as to be alternately located on the other side. Of the plurality of wire portions arranged in the first frame, the plurality of wire portions located on one side preferably form the plurality of first wires, respectively. Of the plurality of wire portions arranged in the first frame, the plurality of wire portions located on the other side preferably form the plurality of second wires, respectively.

In the method for manufacturing a wire grid of the present invention, the forming step is a first winding step of forming the first wire grid portion by winding the first wire material around the first frame a plurality of times at the predetermined intervals. A fixing step of fixing the pair of first spacers to the first frame body so that the pair of first spacers come into contact with one of the pair of surfaces of the first wire grid portion, and a second. The second wire material is placed on the first frame at the predetermined intervals so that the first wire material and the second wire material are alternately positioned while the wire material is in contact with the pair of first spacers. It is preferable to include a second winding step of forming the second wire grid portion by winding a plurality of times. It is preferable that a plurality of wire portions of the first wire material, which are wound a plurality of times and arranged at a predetermined interval, form the plurality of first wires, respectively. It is preferable that a plurality of wire portions of the second wire material, which are wound a plurality of times and arranged at a predetermined interval, form the plurality of second wires, respectively.

The method for manufacturing a wire grid of the present invention further comprises a second preparatory step of preparing a second frame body and a laminating step of laminating the first frame body and the second frame body to form a laminated body. It is preferable to include it. In the forming step, the first wire material is wound around the laminated body a plurality of times at the predetermined intervals to form the first wire grid portion in the first frame body, and the third wire is formed in the second frame body. The first frame of the pair of first spacers so that the first winding step of forming the grid portion and the pair of first spacers come into contact with one of the pair of surfaces of the first wire grid portion. A fixing step of fixing the pair of second spacers to the second frame body so that the pair of second spacers come into contact with one of the pair of surfaces of the third wire grid portion while being fixed to the body. , The first wire material and the second wire material are alternately positioned on the laminate while the second wire material is in contact with the pair of first spacers and the pair of second spacers. The second wire material is wound a plurality of times at the predetermined interval to form the second wire grid portion in the first frame body and the fourth wire grid portion in the second frame body. It is preferable to include a step. It is preferable that a plurality of wire portions of the first wire material, which are wound a plurality of times and arranged in the first frame at predetermined intervals, form the plurality of first wires, respectively. It is preferable that the plurality of wire portions of the second wire material, which are wound a plurality of times and arranged in the first frame at the predetermined intervals, form the plurality of second wires, respectively.

In the method for producing a wire grid of the present invention, it is preferable that each of the first spacers has a linear shape or a strip shape.

In the method for producing a wire grid of the present invention, it is preferable that each of the first spacers is a metal or a synthetic resin.

In the method for manufacturing a wire grid of the present invention, the thickness of each of the first spacers is preferably twice or less the diameter of the first wire.

According to the present invention, a wire grid having a plurality of wire grid portions can be easily manufactured.

It is a top view which shows the wire grid which concerns on Embodiment 1 of this invention. It is a perspective view which shows the 1st wire grid part, the 2nd wire grid part, and a spacer which concerns on Embodiment 1. FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is a flowchart which shows the manufacturing method of the wire grid which concerns on Embodiment 2 of this invention. (A)-(c) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 3 of this invention. It is a figure which shows the manufacturing method of the wire grid which concerns on (a)-(c) Embodiment 3. (A)-(c) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 4 of this invention. (A) (b) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 4. (A) (b) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 4. (A)-(c) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 5 of this invention. (A) (b) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 5. (A) (b) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 6 of this invention. (A) (b) It is a figure which shows the manufacturing method of the wire grid which concerns on Embodiment 6. It is sectional drawing which shows the wire grid which concerns on Embodiment 7 of this invention. It is a figure which shows the relationship between the transmittance and the frequency of the TE wave which concerns on Example 1, Example 2 of this invention, and comparative example of this invention. It is a figure which shows the relationship between the transmittance and the frequency of the TM wave which concerns on Example 1, Example 2 of this invention, and comparative example of this invention. It is a photograph which shows the wire grid which concerns on Example 3 of this invention. (A) It is a photograph which shows the wire grid which concerns on Example 4 of this invention. (B) It is an enlarged photograph which shows the wire grid which concerns on Example 4. It is a figure which shows the relationship between the transmittance and the frequency of the wire grid which concerns on Example 4. FIG. It is a figure which shows the relationship between the extinction ratio and the frequency of the wire grid which concerns on Example 5 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals and the description is not repeated.

(Embodiment 1)
The wire grid 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a plan view showing the wire grid 1. As shown in FIG. 1, the wire grid 1 controls the polarization of a terahertz wave as an incident wave. For example, the wire grid 1 separates polarized components in the terahertz wave region. The terahertz wave is, for example, an electromagnetic wave of 0.1 terahertz (THz) or more and 10 terahertz (THz) or less.

The wire grid 1 includes a first wire grid portion WG1, a second wire grid portion WG2, a frame body 3, a pair of spacers 9, a pair of first fixtures 11, a pair of second fixtures 12, and a pair of second fixtures 12. A pair of fixtures 16 are provided. The first wire grid portion WG1 includes a plurality of first wires 5. The second wire grid portion WG2 includes a plurality of second wires 7. The first fixture 11 includes a presser plate 11a and two screws 11b. The second fixture 12 includes a presser plate 12a and two screws 12b. The fixture 16 includes a presser plate 17 and a pair of screws 19.

The plurality of first wires 5 extend along the first direction D1 (direction intersecting in one direction) and are arranged along the second direction D2 (one direction). The plurality of first wires 5 are arranged substantially in parallel. The plurality of first wires 5 are stretched on the frame body 3. The first wire 5 is a metal (for example, tungsten). In the first embodiment, the first direction D1 is orthogonal to the second direction D2.

The plurality of second wires 7 extend along the first direction D1 and are arranged along the second direction D2. The plurality of second wires 7 are arranged substantially in parallel. The plurality of second wires 7 are stretched over the frame body 3. The second wire 7 is a metal (for example, tungsten).

The first wire 5 and the second wire 7 are alternately located. The first wire 5 and the second wire 7 are arranged substantially in parallel.

In order to make the drawings easier to see, the total number of the first wire 5 and the second wire 7 is made smaller than the actual number (for example, several hundreds). Further, for the same reason, the first wire 5 is shown in black and the second wire 7 is shown by dot hatching.

The frame body 3 has a substantially rectangular shape. The frame body 3 has a substantially rectangular opening 4. The frame body 3 is, for example, a metal (for example, aluminum).

One of the pair of fixtures 16, the fixture 16, fixes one end of the plurality of first wires 5 and one end of the plurality of second wires 7 to the frame body 3. Specifically, the pressing plate 17 and the frame body 3 sandwich the holding plate 17 with one end of the plurality of first wires 5 and one end of the plurality of second wires 7. Then, by screwing the screw 19 into the frame body 3 via the pressing plate 17, the pressing plate 17 presses one end of the plurality of first wires 5 and one end of the plurality of second wires 7.

The other fixture 16 of the pair of fixtures 16 has the other end of the plurality of first wires 5 and the other end of the plurality of second wires 7 in the same manner as the one fixture 16. Fix to.

The pair of spacers 9 extend along the second direction D2 and are spaced apart from each other along the first direction D1. Therefore, the pair of spacers 9 are not located in the optical path of the terahertz wave TH. The pair of spacers 9 are arranged substantially in parallel. The pair of spacers 9 are arranged between the first wire grid portion WG1 and the second wire grid portion WG2. The pair of spacers 9 are stretched on the frame body 3.

Each of the spacers 9 has, for example, a substantially linear shape or a substantially strip shape. Each of the spacers 9 is, for example, metal, synthetic resin, or thread. The metal is, for example, tungsten or aluminum. The synthetic resin is, for example, polyethylene, polyvinylidene chloride, polyvinyl chloride, or polymethylpentene. The yarn is formed of, for example, fibers (eg, natural or chemical fibers).

For example, when the spacer 9 has a substantially linear shape, it is preferably a metal (for example, tungsten). For example, when the spacer 9 has a substantially linear shape, it is preferably a wire (for example, a metal wire). For example, when the spacer 9 has a substantially strip shape, it is preferably a metal foil or a synthetic resin film. The metal foil is, for example, an aluminum foil. The synthetic resin film is, for example, a wrap film (for example, a food wrap film).

The first fixture 11 fixes one end of the pair of spacers 9 to the frame body 3. Specifically, the pressing plate 11a and the frame body 3 sandwich one end of the pair of spacers 9. Then, by screwing the screw 11b into the frame body 3 via the pressing plate 11a, the pressing plate 11a presses one end of the pair of spacers 9.

The second fixture 12 fixes the other ends of the pair of spacers 9 to the frame body 3. Specifically, the pressing plate 12a and the frame body 3 sandwich the other ends of the pair of spacers 9. Then, by screwing the screw 12b into the frame body 3 via the pressing plate 12a, the pressing plate 12a presses the other ends of the pair of spacers 9.

Next, the spacer 9 will be described with reference to FIG. FIG. 2 is a perspective view showing a first wire grid portion WG1, a second wire grid portion WG2, and a spacer 9. As shown in FIG. 2, the spacer 9 is arranged between the first wire grid portion WG1 and the second wire grid portion WG2. By arranging the spacer 9, the distance between the first wire grid portion WG1 and the second wire grid portion WG2 can be kept constant. As a result, it is possible to prevent the first wire 5 and the second wire 7 from coming into contact with each other.

Next, the relationship between the first wire 5, the second wire 7, and the spacer 9 will be described with reference to FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. As shown in FIG. 3, the plurality of first wires 5 are arranged along the second direction D2 at the first predetermined interval d (predetermined interval). The first predetermined interval d indicates an interval along the second direction D2. The plurality of second wires 7 are arranged along the second direction D2 at the first predetermined interval d.

The first predetermined interval d is shorter than the wavelength of the terahertz wave TH. Therefore, the wire grid 1 transmits a polarization component (hereinafter, referred to as “TE wave”) perpendicular to the first wire 5 and the second wire 7 of the terahertz wave TH. That is, the electric field of the TE wave is perpendicular to the first wire 5 and the second wire 7. On the other hand, the wire grid 1 does not transmit the polarization component (hereinafter, referred to as “TM wave”) parallel to the first wire 5 and the second wire 7 of the terahertz wave TH. That is, the electric field of the TM wave is parallel to the first wire 5 and the second wire 7. Since the wire grid 1 is a free stand type composed of metal (first wire 5 and second wire 7) and a free space (opening 4), there is almost no multiple reflection and absorption of electromagnetic waves by the substrate material. Thus, the wire grid 1 functions, for example, as an efficient polarizer.

The second wire 7 is shifted with respect to the first wire 5 by a shift amount p along the second direction D2. The first wire 5 and the second wire 7 are arranged with a second predetermined interval L. The second predetermined interval L indicates an interval along the third direction D3. The third direction D3 is orthogonal to the first direction D1 and the second direction D2 (FIG. 2). Each of the first wire 5 and the second wire 7 has a diameter D. The spacer 9 has a thickness t. When the spacer 9 has a substantially linear shape, the thickness t indicates the diameter of the spacer 9. When the spacer 9 has a substantially strip shape, the thickness t indicates the distance between the pair of main surfaces of the spacer 9.

By adjusting the thickness t and the material of the spacer 9, the shift amount p, the first predetermined interval d, and the second predetermined interval L can be easily adjusted.

For example, it is preferable that p = 0.5 × d. For example, it is preferable that L = D. However, it may be L <D or L> D. For example, it is preferable that D / d = 0.5. For example, the thickness t is preferably not more than twice the diameter D of the first wire 5 (t ≦ 2 × D). For example, the thickness t is more preferably 1 times or less the diameter D of the first wire 5 (t ≦ 1 × D). For example, the thickness t is more preferably smaller than the diameter D of the first wire 5 (t <D). For example, the thickness t is more preferably (√3-1) times (= about 0.7 times) or less the diameter D of the first wire 5 (t ≦ (√3-1) × D). This is because, as a result of the simulation, the second predetermined interval L is √3 times or less the diameter D of the first wire 5, and the polarization performance is dramatically improved. For example, the thickness t is more preferably 0.5 times or less the diameter D of the first wire 5 (t ≦ 0.5 × D). For example, p = 100 μm, d = 200 μm, L = 100 μm, D = 100 μm, t = 50 μm.

In the examples of FIGS. 2 and 3, the spacers 9 are arranged in a substantially wavy shape between the first wire 5 and the second wire 7. For example, in the third and fourth embodiments described later, the spacers 9 are arranged in a substantially wavy shape between the first wire 5 and the second wire 7. However, the spacer 9 may be substantially flat and may be arranged between the first wire 5 and the second wire 7. For example, in the fifth and sixth embodiments described later, the spacer 9 becomes substantially flat and is arranged between the first wire 5 and the second wire 7.

As described above with reference to FIGS. 1 to 3, according to the first embodiment, the spacer 9 is arranged between the first wire grid portion WG1 and the second wire grid portion WG2. Therefore, since it is possible to prevent the first wire 5 and the second wire 7 from coming into contact with each other, a precise alignment that prevents the first wire 5 and the second wire 7 from coming into contact with each other is relaxed. Further, since the wire material can be wound around the spacer 9 as a guide, the first wire 5 and the second wire 7 having a shift amount p and a second predetermined interval L can be easily formed. Further, by adjusting the thickness t and the material of the spacer 9, the shift amount p and the second predetermined interval L can be easily adjusted. As a result, the positioning of the second wire 7 with respect to the first wire 5 becomes easier as compared with the case where the spacer 9 is not provided, and the wire grid 1 can be easily manufactured. In other words, the wire grid according to the first embodiment has a plurality of wire grid portions (first wire grid portion WG1 and second wire grid portion WG2) and can be easily manufactured.

Further, according to the first embodiment, by providing the spacer 9, the first wire grid portion WG1 and the second wire grid portion WG2 can be formed on one frame body 3. That is, the wire grid 1 can be formed integrally with the first wire grid portion WG1 and the second wire grid portion WG2. Therefore, the positioning of the second wire grid portion WG2 with respect to the first wire grid portion WG1 is higher than that in the case where the first wire grid portion WG1 and the second wire grid portion WG2 are formed in different frames and are separate members. It will be easier. As a result, the wire grid 1 can be manufactured more easily.

Further, according to the first embodiment, when the spacer 9 has a substantially linear shape, the wire grid 1 can be downsized as compared with the case where the spacer 9 has a substantially strip shape. On the other hand, when the spacer 9 has a substantially strip shape, the durability of the wire grid 1 can be improved even if a material having a relatively low strength such as a synthetic resin is used.

Further, according to the first embodiment, when the spacer 9 is made of metal, the durability of the wire grid 1 can be improved while the wire grid 1 can be downsized. On the other hand, when the spacer 9 is made of synthetic resin, it has more elasticity than metal, so that the second predetermined interval L can be reduced even if the thickness t is increased to ensure durability.

Further, according to the first embodiment, the first wire grid portion WG1 and the second wire grid portion WG2 are provided, and while adopting a two-layer structure, the second wire 7 shifts only the shift amount p with respect to the first wire 5. It's shifting. Therefore, as compared with the case of the one-layer structure (when having only one wire grid portion), it is possible to suppress the TM wave from passing through the wire grid 1. That is, the extinction ratio can be improved. Extinction ratio = (TM wave transmittance Tm) / (TE wave transmittance Te). Further, for the same reason, since Fabry-Perot resonance (Fabry-Pérot resonance) is effectively expressed, the loss can be reduced as compared with the case of adopting the one-layer structure. Loss = 1-Te. Further, for the same reason, it is possible to realize a wide band of the wire grid 1. Widening the bandwidth indicates that the frequency band is wide when the extinction ratio is below a certain value (for example, 10 ^-4).

In order to effectively improve the extinction ratio, reduce the loss, and widen the bandwidth, for example, L = D is preferable. In order to realize L = D, it is preferable to reduce the thickness t of the spacer 9. For example, t ≦ 2 × D is preferable, t ≦ 1.5 × D is more preferable, t = D is more preferable, and t <D is more preferable. ..

The wire grid 1 according to the first embodiment can be used as, for example, a polarizer or a polarizing beam splitter.

(Embodiment 2)
A method for manufacturing a wire grid according to a second embodiment of the present invention will be described with reference to FIGS. 1 and 4. The manufacturing method according to the second embodiment is an example of the manufacturing method of the wire grid 1 according to the first embodiment shown in FIG.

FIG. 4 is a flowchart showing a method of manufacturing the wire grid 1 according to the second embodiment. As shown in FIG. 4, the manufacturing method includes a preparation step S1 (first preparation step) and a forming step S3.

As shown in FIGS. 1 and 4, the frame body 3 (first frame body) is prepared in the preparation step S1.

In the forming step S3, a pair of spacers 9 (a pair of first spacers) are formed between the first wire grid portion WG1 including the plurality of first wires 5 and the second wire grid portion WG2 including the plurality of second wires 7. The first wire grid portion WG1 and the second wire grid portion WG2 are formed on the frame body 3 so that

Specifically, in the forming step S3, a plurality of first wires 5 are arranged at a first predetermined interval d (predetermined) shorter than the wavelength of the terahertz wave so that the first wire 5 and the second wire 7 are alternately positioned. (Interval) is arranged along the second direction D2 (one direction), and a plurality of second wires 7 are arranged along the second direction D2 at the first predetermined interval d. Further, the pair of spacers 9 are arranged at intervals from each other along the first direction D1 (direction intersecting in one direction) so as to extend along the second direction D2. Therefore, the pair of spacers 9 are not located in the optical path of the terahertz wave TH.

As described above with reference to FIG. 4, according to the second embodiment, the spacer 9 is used to form the first wire grid portion WG1 and the second wire grid portion WG2 to form the wire grid 1. To manufacture. Therefore, since it is possible to prevent the first wire 5 and the second wire 7 from coming into contact with each other, a precise alignment that prevents the first wire 5 and the second wire 7 from coming into contact with each other is relaxed. Further, since the wire material can be wound around the spacer 9 as a guide, the first wire 5 and the second wire 7 having a shift amount p and a second predetermined interval L can be easily formed. Further, by adjusting the thickness t and the material of the spacer 9, the shift amount p and the second predetermined interval L can be easily adjusted. As a result, the positioning of the second wire 7 with respect to the first wire 5 becomes easier as compared with the case where the spacer 9 is not provided, and the wire grid 1 can be easily manufactured.

Further, according to the first embodiment, by providing the spacer 9, the first wire grid portion WG1 and the second wire grid portion WG2 can be formed on one frame body 3. That is, the wire grid 1 can be formed integrally with the first wire grid portion WG1 and the second wire grid portion WG2. Therefore, the positioning of the second wire grid portion WG2 with respect to the first wire grid portion WG1 is higher than that in the case where the first wire grid portion WG1 and the second wire grid portion WG2 are formed in different frames and are separate members. It will be easier. As a result, the wire grid 1 can be manufactured more easily. In addition, the wire grid 1 manufactured by the manufacturing method according to the second embodiment has the same effect as the wire grid 1 of the first embodiment.

(Embodiment 3)
A method for manufacturing a wire grid according to a third embodiment of the present invention will be described with reference to FIGS. 5 and 6. The manufacturing method according to the third embodiment is an example of the manufacturing method of the wire grid 1 according to the first embodiment shown in FIG. Further, in the manufacturing method according to the third embodiment, the wire grid 1 is manufactured by using the spacer 9 having a substantially linear shape. The spacer 9 is, for example, metal. Hereinafter, in the third embodiment, the spacer 9 having a substantially linear shape will be referred to as “spacer 9a”.

5 (a) to 5 (c) and 6 (a) to 6 (c) are views showing a method of manufacturing the wire grid 1 according to the third embodiment. As shown in FIGS. 5 (a) to 5 (c) and 6 (a) to 6 (c), the manufacturing method includes a preparation step S11 (first preparation step), a first fixing step S13, and the like. The winding step S15, the second fixing step S17, and the third fixing step S19 are included. The first fixing step S13, the winding step S15, the second fixing step S17, and the third fixing step S19 constitute a forming step. In order to make the drawings easier to see, the total number of the first wire 5 and the second wire 7 is made smaller than the actual number (for example, several hundreds). Further, for the same reason, the first wire 5 is shown in black and the second wire 7 is shown by dot hatching.

As shown in FIG. 5A, the frame body 3 is prepared in the preparation step S11.

As shown in FIG. 5B, in the first fixing step S13, one ends of the pair of spacers 9a (pair of first spacers) are positioned at two starting points of the frame body 3 (first frame body), respectively. Fix it. Specifically, one end of each pair of spacers 9a is fixed to the frame body 3 by a pair of first fixtures 11.

As shown in FIG. 5C, in the winding step S15, first, one end of one wire material WR is temporarily fixed at one starting point position of the frame body 3. Specifically, one end of the wire material WR is temporarily fixed to the frame body 3 by the temporary fixing member 21. The temporary fixing member 21 is, for example, an adhesive tape.

As shown in FIGS. 5 (c), 6 (a), and 6 (b), in the winding step S15, one wire material WR is then wound around the frame 3 a plurality of times. 1 The wire grid portion WG1 and the second wire grid portion WG2 are formed.

Specifically, in the winding step S15, the wire material WR intersects the pair of spacers 9a. Then, the wire portions WP arranged along the second direction D2 (one direction) of the wire material WR are adjacent to each other so as to be alternately located on one side and the other side with respect to the pair of spacers 9a. The wire material WR is wound around the frame 3 while passing a pair of spacers 9a between the WPs. "One side and the other side with respect to the pair of spacers 9a" indicates the side closer to the opening 4 and the side farther from the opening 4 of the frame body 3 with respect to the pair of spacers 9a.

In other words, in the winding step S15, the pair of spacers is wound around the frame 3 so that the plurality of wire portion WPs are formed at intervals of the shift amount p along the second direction D2. 9a is woven into a plurality of wire portions WP.

Of the plurality of wire portion WPs, the plurality of wire portion WPs located on one side of the pair of spacers 9a each constitute a plurality of first wires 5. Of the plurality of wire portion WPs, the plurality of wire portion WPs located on the other side of the pair of spacers 9a each constitute a plurality of second wires 7.

For example, in the winding step S15, while rotating the frame body 3 around the axis AX, a plurality of wire material WRs are applied to the frame body 3 at intervals of the shift amount p so that the wire material WR intersects the pair of spacers 9a. It is rotated to form the first wire grid portion WG1 and the second wire grid portion WG2.

For example, in the winding step S15, each time the frame body 3 makes a half rotation around the axis AX, the wire material WR is shifted along the second direction D2 by 1/2 of the shift amount p. Further, each time the frame body 3 makes one rotation around the axis AX, the pair of spacers 9a are alternately positioned at the first position and the second position, and the pair of spacers are placed between the adjacent wire portions WP. Pass 9a. As a result, the pair of spacers 9a are woven into the plurality of wire portions WP. The "first position" indicates a position farther than the opening 4 with respect to the wire portion WP, and the "second position" indicates a position closer to the opening 4 with respect to the wire portion WP. By shifting the wire material WR by 1/2 of the shift amount p each half rotation, the second wire 7 can be shifted with respect to the first wire 5 by the shift amount p.

As shown in FIG. 6B, in the second fixing step S17, after winding the wire material WR a plurality of times, the other ends of the pair of spacers 9a are fixed to the two end positions of the frame body 3, respectively. To do. Specifically, the other ends of the pair of spacers 9a are fixed to the frame body 3 by the pair of second fixtures 12, respectively.

As shown in FIG. 6C, in the third fixing step S19, one end of the plurality of first wires 5 and one end of the plurality of second wires 7 are fixed to one of the pair of fixing tools 16. The other ends of the plurality of first wires 5 and the other ends of the plurality of second wires 7 are fixed to the frame body 3 by the other fixing tool 16. Then, a plurality of wire portions located on the back surface of the frame body 3 are cut and removed from the frame body 3. As a result, the wire grid 1 is completed.

As described above with reference to FIGS. 5 and 6, according to the third embodiment, since the spacer 9a is used, the wire grid 1 can be easily manufactured as in the second embodiment. In addition, the third embodiment has the same effects as those of the first and second embodiments.

Further, according to the third embodiment, the wire is passed through the pair of spacers 9a between the adjacent wire portions WP so that the wire portions WP are alternately positioned on one side and the other side with respect to the pair of spacers 9a. Manufacture grid 1. Therefore, the first wire 5 and the second wire 7 can be formed by a series of winding operations by winding the first wire 5 and the second wire 7 at intervals of the shift amount p using one wire material WR. As a result, the wire grid 1 can be manufactured more easily.

Further, according to the third embodiment, since the spacer 9a has a substantially linear shape, it is easier to pass the pair of spacers 9a between the wire portions WP adjacent to each other as compared with the case where the spacer 9a has a substantially strip shape. Is. As a result, the wire grid 1 can be manufactured more easily.

Further, according to the third embodiment, the spacer 9a is a metal. Therefore, the spacer 9a can improve the strength and durability while having a substantially linear shape.

In the winding step S15, the wire material WR may be wound a plurality of times to arrange all the wire portion WPs, and then the spacer 9a may be woven into the plurality of wire portion WPs by using a needle or the like. Good.

(Embodiment 4)
A method for manufacturing a wire grid according to a fourth embodiment of the present invention will be described with reference to FIGS. 7 to 9. In the manufacturing method according to the fourth embodiment, two wire grids 1 according to the first embodiment shown in FIG. 1 are manufactured at the same time. Further, in the manufacturing method according to the fourth embodiment, the wire grid 1 is manufactured by using the spacer 9 having a substantially linear shape. The spacer 9 is, for example, metal.

Hereinafter, in the fourth embodiment, for convenience of explanation, the frame 3 and the spacer 9 of one of the two wire grids 1 manufactured at the same time are used as the first frame 3A and the first spacer 9, respectively. It is described as spacer 9a1. The names and reference numerals of the other configurations of the wire grid 1 on the other hand are unchanged. Further, the frame body 3, the spacer 9, the first wire grid portion WG1, the second wire grid portion WG2, the first wire 5, and the second wire 7 of the other wire grid 1, respectively, are the second frame body 3B and the second wire grid 1, respectively. 2 Spacer 9a2, 3rd wire grid portion WG3, 4th wire grid portion WG4, 3rd wire 5B, and 4th wire 7B. Regarding the other configuration of the other wire grid 1, the name and the reference code are not changed.

7 (a) to 7 (c), 8 (a), 8 (b), 9 (a), and 9 (b) show the method for manufacturing the wire grid 1 according to the fourth embodiment. It is a figure which shows. As shown in FIGS. 7 (a) to 7 (c), 8 (a), 8 (b), 9 (a), and 9 (b), the manufacturing method is the first preparation step S31. The second preparatory step S33, the laminating step S35, the first fixing step S37, the winding step S39, the second fixing step S41, and the third fixing step S43 are included. The first fixing step S37, the winding step S39, the second fixing step S41, and the third fixing step S43 constitute a forming step. In order to make the drawings easier to see, the total number of the first wire 5 and the second wire 7 is made smaller than the actual number (for example, several hundreds). Further, for the same reason, the first wire 5 is shown in black and the second wire 7 is shown by dot hatching. Further, since the second frame body 3B faces the back side of the paper surface of the drawing, each configuration formed in the second frame body 3B does not appear in the drawing.

As shown in FIG. 7A, the first frame body 3A is prepared in the first preparation step S31.

As shown in FIG. 7B, the second frame body 3B is prepared in the second preparation step S33.

As shown in FIG. 7C, in the laminating step S35, the first frame body 3A and the second frame body 3B are laminated to form the laminated body 10.

As shown in FIG. 8A, in the first fixing step S37, one ends of the pair of first spacers 9a1 are fixed at two starting points of the first frame body 3A, respectively. Further, in the first fixing step S37, one ends of the pair of second spacers 9a2 are fixed at two starting points of the second frame body 3B, respectively. The specific fixing method in the first fixing step S37 is the same as that in the first fixing step S13 (FIG. 5B).

As shown in FIG. 8B, in the winding step S39, first, one end of one wire material WR is temporarily fixed at one starting point position of the first frame body 3A. Specifically, the wire material WR is temporarily fixed to the first frame body 3A by the temporary fixing member 21. The temporary fixing member 21 is, for example, an adhesive tape.

As shown in FIGS. 8 (b) and 9 (a), in the winding step S39, one wire material WR is then wound a plurality of times around the laminated body 10, and the first wire grid portion WG1 and the first wire grid portion WG1 and the first wire grid portion WG1 are wound. 2 The wire grid portion WG2 is formed in the first frame body 3A, and the third wire grid portion WG3 and the fourth wire grid portion WG4 are formed in the second frame body 3B.

Specifically, in the winding step S39, the wire material WR intersects the pair of first spacers 9a1 arranged in the first frame body 3A. Then, the wire portion WPs arranged in the first frame 3A along the second direction (one direction) of the wire material WR are alternately located on one side and the other side with respect to the pair of first spacers 9a1. In addition, the wire material WR is wound around the laminate 10 while passing a pair of first spacers 9a1 between the wire portions WP adjacent to each other. "One side and the other side with respect to the pair of first spacers 9a1" indicates the side closer to the opening 4 and the side farther from the opening 4 of the first frame body 3A with respect to the pair of first spacers 9a1.

In other words, in the winding step S39, the wire material WR is wound around the laminated body 10 so that a plurality of wire portion WPs are formed at intervals of the shift amount p along the second direction D2 in the first frame body 3A. While rotating, the pair of first spacers 9a1 are woven into the plurality of wire portions WP in the first frame body 3A.

Of the plurality of wire portion WPs arranged in the first frame body 3A, the plurality of wire portion WPs located on one side of the pair of first spacers 9a1 each constitute the plurality of first wires 5. Of the plurality of wire portion WPs arranged in the first frame body 3A, the plurality of wire portion WPs located on the opposite side of the pair of first spacers 9a1 each constitute the plurality of second wires 7.

Further, in the winding step S39, the wire material WR intersects the pair of second spacers 9a2 arranged in the second frame body 3B. Then, the wire portion WPs arranged in the second frame 3B along the second direction (one direction) of the wire material WR are alternately located on one side and the other side with respect to the pair of second spacers 9a2. In addition, the wire material WR is wound around the laminate 10 while passing a pair of second spacers 9a2 between the wire portions WP adjacent to each other. "One side and the other side with respect to the pair of second spacers 9a2" indicates the side closer to the opening 4 and the side farther from the opening 4 of the second frame body 3B with respect to the pair of second spacers 9a2.

In other words, in the winding step S39, the wire material WR is wound around the laminated body 10 so that a plurality of wire portion WPs are formed at intervals of the shift amount p along the second direction D2 in the second frame body 3B. While rotating, the pair of second spacers 9a2 are woven into the plurality of wire portions WP in the second frame body 3B.

Of the plurality of wire portion WPs arranged in the second frame body 3B, the plurality of wire portion WPs located on one side of the pair of second spacers 9a2 each constitute the plurality of third wires 5B. Of the plurality of wire portion WPs arranged in the second frame body 3B, the plurality of wire portion WPs located on the opposite side of the pair of second spacers 9a2 each constitute the plurality of fourth wires 7B.

For example, in the winding step S39, the wire material is formed on the laminate 10 so that the wire material WR intersects the pair of first spacers 9a1 and the pair of second spacers 9a2 while rotating the laminate 10 around the axis AX. The WR is wound a plurality of times at intervals of the shift amount p to form the first wire grid portion WG1 and the second wire grid portion WG2 in the first frame body 3A, and the third wire grid portion WG3 and the fourth wire grid portion. The WG4 is formed in the second frame 3B.

For example, in the winding step S39, each time the laminated body 10 makes a half rotation around the axis AX, the wire material WR is shifted along the second direction D2 by 1/2 of the shift amount p. Further, each time the laminate 10 makes one rotation around the axis AX, a pair of first spacers 9a1 are paired between adjacent wire portions WP so that the pair of first spacers 9a1 are alternately positioned at the first position and the second position. Along with passing the first spacer 9a1 of the above, a pair of second spacers 9a2 are passed between the wire portion WPs adjacent to each other so that the pair of second spacers 9a2 are alternately positioned at the first position and the second position.

As a result, the pair of first spacers 9a1 are woven into the plurality of wire portions WP in the first frame body 3A, and the pair of second spacers 9a2 are woven into the plurality of wire portions WP in the second frame body 3B. The "first position" indicates a position farther than the opening 4 with respect to the wire portion WP, and the "second position" indicates a position closer to the opening 4 with respect to the wire portion WP. By shifting the wire material WR by 1/2 of the shift amount p each half turn, the second wire 7 can be shifted with respect to the first wire 5 by the shift amount p in the first frame body 3A, and In the second frame body 3B, the fourth wire 7B can be shifted with respect to the third wire 5B by the shift amount p.

As shown in FIG. 9A, in the second fixing step S41, after the wire material WR is wound a plurality of times, the other ends of the pair of first spacers 9a1 are respectively placed at two positions of the first frame body 3A. Fix at the end point position. Further, the other ends of the pair of second spacers 9a2 are fixed at two end points of the second frame body 3B, respectively. The specific fixing method in the second fixing step S41 is the same as that in the second fixing step S17 (FIG. 6B).

As shown in FIG. 9B, in the third fixing step S43, one end of the plurality of first wires 5 and one end of the plurality of second wires 7 are attached to a pair of fixing tools 16 corresponding to the first frame body 3A. The other end of the plurality of first wires 5 and the other end of the plurality of second wires 7 are fixed to the first frame body 3A by one of the fixtures 16 of the pair. It is fixed to the first frame body 3A by the fixing tool 16 of the above. Further, one end of the plurality of third wires 5B and one end of the plurality of fourth wires 7B are attached to the second frame 3B by one of the pair of fixtures 16 corresponding to the second frame 3B. At the same time, the other ends of the plurality of third wires 5B and the other ends of the plurality of fourth wires 7B are fixed to the second frame body 3B by the other fixing tool 16 of the pair of fixing tools 16. Then, the wire material WR is cut between the fixture 16 of the first frame 3A and the fixture 16 of the second frame 3B to separate the two wire grids 1.

As described above with reference to FIGS. 7 to 9, according to the fourth embodiment, since the first spacer 9a1 and the second spacer 9a2 are used, the wire grid 1 can be easily formed as in the third embodiment. Can be manufactured. In addition, the fourth embodiment has the same effect as that of the third embodiment.

Further, according to the fourth embodiment, two wire grids 1 can be manufactured at the same time by providing the laminating step S35. As a result, the number of wire grids 1 manufactured per unit time can be increased.

In the winding step S39, the wire material WR is wound a plurality of times to arrange all the wire portion WPs, and then a needle or the like is used to connect the first spacers to the plurality of wire portion WPs in the first frame body 3A. You may pass it so that 9a1 is woven. Similarly, after winding the wire material WR a plurality of times and arranging all the wire portion WPs, the second spacer 9a2 may be woven into the plurality of wire portion WPs in the second frame body 3B.

(Embodiment 5)
A method for manufacturing a wire grid according to a fifth embodiment of the present invention will be described with reference to FIGS. 10 and 11. The manufacturing method according to the fifth embodiment is an example of the manufacturing method of the wire grid 1 according to the first embodiment shown in FIG. Further, in the manufacturing method according to the fifth embodiment, the wire grid 1 is manufactured by using the spacer 9 having a substantially band shape. The spacer 9 is, for example, a synthetic resin film or a metal leaf. Hereinafter, in the fifth embodiment, the spacer 9 having a substantially strip-shaped shape will be referred to as “spacer 9b”.

10 (a) to 10 (c), 11 (a), and 11 (b) are diagrams showing a method of manufacturing the wire grid 1 according to the fifth embodiment. As shown in FIGS. 10 (a) to 10 (c), 11 (a), and 11 (b), the manufacturing methods include a preparation step S51 (first preparation step) and a first winding step S53. The first fixing step S55 (fixing step), the second winding step S57, and the second fixing step S59 are included. The first winding step S53, the first fixing step S55, the second winding step S57, and the second fixing step S59 constitute a forming step. In order to make the drawings easier to see, the total number of the first wire 5 and the second wire 7 is made smaller than the actual number (for example, several hundreds). Further, for the same reason, the first wire 5 is shown in black and the second wire 7 is shown by dot hatching.

As shown in FIG. 10A, the frame body 3 is prepared in the preparation step S51.

As shown in FIG. 10B, in the first winding step S53, first, one end of one first wire material WR1 is temporarily fixed at one starting point position of the frame body 3. Specifically, one end of the first wire material WR1 is temporarily fixed to the frame body 3 by the temporary fixing member 23. The temporary fixing member 23 is, for example, an adhesive tape.

Next, in the first winding step S53, the first wire material WR1 is wound around the frame body 3 (first frame body) a plurality of times at the first predetermined interval d (predetermined interval) to form the first wire grid portion WG1. Form. A plurality of wire portions WP1 of the first wire material WR1 that are wound a plurality of times and arranged at a first predetermined interval d form a plurality of first wires 5, respectively.

For example, in the first winding step S53, the first wire material WR1 is wound around the frame body 3 a plurality of times at the first predetermined interval d while rotating the frame body 3 around the axis AX, and the first wire grid portion. Form WG1.

For example, in the first winding step S53, each time the frame body 3 makes a half rotation around the axis AX, the wire material WR is shifted along the second direction D2 by 1/2 of the first predetermined interval d. As a result, a plurality of first wires 5 can be arranged at the first predetermined interval d.

Further, in the first winding step S53, the other end of the first wire material WR1 is temporarily fixed at one end point position of the frame body 3. Specifically, the other end of the first wire material WR1 is temporarily fixed to the frame body 3 by the temporary fixing member 24. The temporary fixing member 24 is, for example, an adhesive tape.

As shown in FIG. 10C, in the first fixing step S55, the pair of spacers 9b (first spacer) comes into contact with one of the pair of surfaces of the first wire grid portion WG1. 9b is fixed to the frame body 3. The “one surface” is a surface opposite to the surface facing the opening 4 among the pair of surfaces of the first wire grid portion WG1. Specifically, one end of the pair of spacers 9b is fixed to the frame 3 by the first fixture 11, and the other end of the pair of spacers 9b is fixed to the frame 3 by the second fixture 12.

As shown in FIG. 11A, in the second winding step S57, first, one end of one second wire material WR2 is temporarily fixed at one starting point position of the frame body 3. Specifically, one end of the second wire material WR2 is temporarily fixed to the frame body 3 by the temporary fixing member 25. The temporary fixing member 25 is, for example, an adhesive tape.

Next, in the second winding step S57, the first wire material WR1 and the second wire material WR2 are alternately positioned on the frame body 3 while the second wire material WR2 is in contact with the pair of spacers 9b. The second wire material WR2 is wound a plurality of times at the first predetermined interval d to form the second wire grid portion WG2. A plurality of wire portions WP2 of the second wire material WR2, which are wound a plurality of times and arranged at a first predetermined interval d, each constitute a plurality of second wires 7.

For example, in the second winding step S57, while rotating the frame body 3 around the axis AX, the second wire material WR2 is wound around the frame body 3 a plurality of times at the first predetermined interval d, and the second wire grid portion is formed. Form WG2.

For example, in the second winding step S57, each time the frame body 3 makes a half rotation around the axis AX, the second wire material WR2 is shifted along the second direction D2 by 1/2 of the first predetermined interval d. .. As a result, a plurality of second wires 7 can be arranged at the first predetermined interval d.

As described above with reference to FIGS. 10 and 11, according to the fifth embodiment, since the spacer 9b is used, the wire grid 1 can be easily manufactured as in the second embodiment. In addition, the fifth embodiment has the same effects as those of the first and second embodiments.

Further, according to the fifth embodiment, the first wire 5 is formed in the first winding step S53, the spacer 9b is fixed to the frame body 3 in the first fixing step S55, and the second wire is formed in the second winding step S57. 7 is formed to manufacture the wire grid 1. Therefore, it is easy to arrange the spacer 9b between the first wire grid portion WG1 and the second wire grid portion WG2. As a result, the wire grid 1 can be manufactured more easily.

Further, according to the fifth embodiment, after the second winding step S57, the same steps as the first fixing step S55, the same steps as the first winding step S53, and the same steps as the first fixing step S55. By alternately repeating the same steps as in the second winding step S57, a wire grid having a three-layer structure or more (a wire grid having three or more wire grid portions) can be easily manufactured.

Further, according to the fifth embodiment, since the spacer 9b has a substantially band shape, a slight saddle portion is formed between the wire portions WP1 adjacent to each other. As a result, when the second wire material WR2 is wound, the wire portion WP2 enters the saddle portion (self-organization), so that the second wire 7 can be easily formed.

Further, according to the fifth embodiment, when the spacer 9b is a synthetic resin film, since it has an appropriate coefficient of friction, it is possible to prevent the second wire material WR2 from slipping on the spacer 9b, and the second wire 7 can be accurately performed. Can be formed. Further, since the spacer 9b has a substantially band shape, the strength and durability can be improved even if a synthetic resin film is used.

Further, according to the fifth embodiment, when the spacer 9b is a metal foil, the strength and durability can be improved.

(Embodiment 6)
A method for manufacturing a wire grid according to a sixth embodiment of the present invention will be described with reference to FIGS. 7, 12, and 13. In the manufacturing method according to the sixth embodiment, two wire grids 1 according to the first embodiment shown in FIG. 1 are manufactured at the same time. Further, in the manufacturing method according to the sixth embodiment, the wire grid 1 is manufactured by using the spacer 9 having a substantially band shape. The spacer 9 is, for example, a synthetic resin film or a metal leaf.

Hereinafter, in the sixth embodiment, for convenience of explanation, the frame 3 and the spacer 9 of one of the two wire grids 1 manufactured at the same time are used as the first frame 3A and the first spacer 9, respectively. It is described as spacer 9b1. The names and reference numerals of the other configurations of the wire grid 1 on the other hand are unchanged. Further, the frame body 3, the spacer 9, the first wire grid portion WG1, the second wire grid portion WG2, the first wire 5, and the second wire 7 of the other wire grid 1, respectively, are the second frame body 3B and the second wire grid 1, respectively. 2 Spacer 9b2, 3rd wire grid portion WG3, 4th wire grid portion WG4, 3rd wire 5B, and 4th wire 7B. Regarding the other configuration of the other wire grid 1, the name and the reference code are not changed.

12 (a), 12 (b), 13 (a), and 13 (b) are diagrams showing a method of manufacturing the wire grid 1 according to the sixth embodiment. As shown in FIGS. 7 (a) to 7 (c), 12 (a), 12 (b), 13 (a), and 13 (b), the manufacturing method is the first preparation step S31. The second preparatory step S33, the laminating step S35, the first winding step S71, the first fixing step S73, the second winding step S75, and the second fixing step S77 are included. The first winding step S71, the first fixing step S73, the second winding step S75, and the second fixing step S77 constitute a forming step. In order to make the drawings easier to see, the total number of the first wire 5 and the second wire 7 is made smaller than the actual number (for example, several hundreds). Further, for the same reason, the first wire 5 is shown in black and the second wire 7 is shown by dot hatching. Further, since the second frame body 3B faces the back side of the paper surface of the drawing, each configuration formed in the second frame body 3B does not appear in the drawing.

As shown in FIGS. 7A to 7C, the first preparation step S31, the second preparation step S33, and the laminating step S35 are the first preparation step S31 and the second preparation according to the fourth embodiment, respectively. It is the same as the step S33 and the laminating step S35, and the description thereof will be omitted.

As shown in FIG. 12A, in the first winding step S71, first, one end of one first wire material WR1 is temporarily fixed at one starting point position of the frame body 3. Specifically, one end of the first wire material WR1 is temporarily fixed to the frame body 3 by the temporary fixing member 23. The temporary fixing member 23 is, for example, an adhesive tape.

Next, in the first winding step S71, the first wire material WR1 is wound around the laminated body 10 a plurality of times at the first predetermined interval d (predetermined interval), and the first wire grid portion WG1 is wound around the first frame body 3A. At the same time, the third wire grid portion WG3 is formed in the second frame body 3B. A plurality of wire portions WP1 of the first wire material WR1 that are wound a plurality of times and arranged in the first frame body 3A at a first predetermined interval d form a plurality of first wires 5, respectively. A plurality of wire portions WP1 of the first wire material WR1 that are wound a plurality of times and arranged in the second frame body 3B at a first predetermined interval d form a plurality of third wires 5B, respectively.

For example, in the first winding step S71, the first wire material WR1 is wound around the laminated body 10 a plurality of times at the first predetermined interval d while rotating the laminated body 10 around the axis AX, and the first frame body 3A The first wire grid portion WG1 is formed in the second frame body 3B, and the second wire grid portion WG2 is formed in the second frame body 3B.

For example, in the first winding step S71, each time the laminated body 10 makes a half rotation around the axis AX, the first wire material WR1 is shifted along the second direction D2 by 1/2 of the first predetermined interval d. .. As a result, a plurality of first wires 5 can be arranged in the first frame body 3A at a first predetermined interval d, and a plurality of third wires 5B can be arranged in the second frame body 3B at a first predetermined interval d.

Further, in the first winding step S71, the other end of the first wire material WR1 is temporarily fixed at one end point position of the first frame body 3A. Specifically, the other end of the first wire material WR1 is temporarily fixed to the first frame body 3A by the temporary fixing member 24. The temporary fixing member 24 is, for example, an adhesive tape.

As shown in FIG. 12B, in the first fixing step S73, the pair of first spacers 9b1 are in contact with one of the pair of surfaces of the first wire grid portion WG1. Is fixed to the first frame body 3A. The “one surface” is a surface opposite to the surface facing the opening 4 among the pair of surfaces of the first wire grid portion WG1. Further, in the first fixing step S73, the pair of second spacers 9b2 are fixed to the second frame body 3B so that the pair of second spacers 9b2 come into contact with one of the pair of faces of the third wire grid portion WG3. To do. The “one surface” is a surface opposite to the surface facing the opening 4 among the pair of surfaces of the third wire grid portion WG3. The specific fixing method in the first fixing step S73 is the same as that in the first fixing step S55 (FIG. 10 (c)).

As shown in FIG. 13A, in the second winding step S75, first, one end of one second wire material WR2 is temporarily fixed at one starting point position of the first frame body 3A. Specifically, one end of the second wire material WR2 is temporarily fixed to the first frame body 3A by the temporary fixing member 25. The temporary fixing member 25 is, for example, an adhesive tape.

Next, in the second winding step S75, the first wire material WR1 and the second wire material WR2 alternate while the second wire material WR2 is in contact with the pair of first spacers 9b1 and the pair of second spacers 9b2. The second wire material WR2 is wound around the laminated body 10 a plurality of times at the first predetermined interval d so as to be located in the first frame body 3A to form the second wire grid portion WG2 and the second frame body 3B. A fourth wire grid portion WG4 is formed on the surface. A plurality of wire portions WP2 of the second wire material WR2, which are wound a plurality of times and arranged in the first frame body 3A at a first predetermined interval d, each constitute a plurality of second wires 7. A plurality of wire portions WP2 wound a plurality of times in the second wire material WR2 and arranged in the second frame body 3B at a first predetermined interval d form a plurality of fourth wires 7B, respectively.

For example, in the second winding step S75, the second wire material WR2 is wound around the laminated body 10 a plurality of times at the first predetermined interval d while rotating the laminated body 10 around the axis AX, and the first frame body 3A The second wire grid portion WG2 is formed in the second frame body 3B, and the fourth wire grid portion WG4 is formed in the second frame body 3B.

For example, in the second winding step S75, each time the laminate 10 makes a half rotation around the axis AX, the second wire material WR2 is shifted along the second direction D2 by 1/2 of the first predetermined interval d. .. As a result, a plurality of second wires 7 can be arranged in the first frame body 3A at the first predetermined interval d, and a plurality of fourth wires 7B can be arranged in the second frame body 3B at the first predetermined interval d.

As shown in FIG. 13B, the second fixing step S77 is the same as the third fixing step S43 described with reference to FIG. 9B, and the description thereof will be omitted.

As described above with reference to FIGS. 12 and 13, according to the sixth embodiment, since the first spacer 9b1 and the second spacer 9b2 are used, the wire grid 1 can be easily formed as in the fifth embodiment. Can be manufactured. In addition, the sixth embodiment has the same effect as that of the fifth embodiment.

Further, according to the sixth embodiment, two wire grids 1 can be manufactured at the same time by providing the laminating step S35. As a result, the number of wire grids 1 manufactured per unit time can be increased.

(Embodiment 7)
The wire grid 1 according to the seventh embodiment of the present invention will be described with reference to FIG. The embodiment that includes two wire grid portions (first wire grid portion WG1 and second wire grid portion WG2) in that the wire grid 1 according to the seventh embodiment includes N or more wire grid portions. It is different from the wire grid 1 according to 1. "N" indicates an integer of 2 or more. Hereinafter, the points that the seventh embodiment is different from the first embodiment will be mainly described. Further, the wire grid 1 including the three wire grid portions will be described below (N = 3).

FIG. 14 is a cross-sectional view showing the wire grid 1 according to the seventh embodiment. As shown in FIG. 14, the wire grid 1 controls the polarization of the terahertz wave as the incident wave. Specifically, the wire grid 1 further includes a third wire grid portion WG3 and a pair of spacers 91 in addition to the first wire grid portion WG1, the second wire grid portion WG2, and the pair of spacers 9. The third wire grid portion WG3 includes a plurality of third wires 8.

The plurality of third wires 8 are arranged along the second direction D2 at the first predetermined interval d (predetermined interval). The third wire 8 shifts with respect to the second wire 7 by a shift amount p along the second direction D2. The second wire 7 and the third wire 8 are arranged with a second predetermined interval L. The third wire 8 has a diameter D. The spacer 91 has a thickness t. When the spacer 91 has a substantially linear shape, the thickness t indicates the diameter of the spacer 91. When the spacer 91 has a substantially strip shape, the thickness t indicates the distance between the pair of main surfaces of the spacer 91.

The same conditions as those in the first embodiment can be adopted for the diameter D, the thickness t, the first predetermined interval d, the second predetermined interval L, and the shift amount p. Further, the third wire 8 can adopt the same conditions as the first wire 5. Further, the spacer 91 can adopt the same conditions as the spacer 9. In the seventh embodiment, the shift amount p, the first predetermined interval d, and the second predetermined interval L can be easily adjusted by adjusting the thickness t and the material of the spacer 9 and the spacer 91 as in the first embodiment. it can.

According to the seventh embodiment, since the spacer 9 and the spacer 91 are provided, a plurality of wire grid portions (first wire grid portion WG1, second wire grid portion WG2, and third wire grid portion WG3) are provided as in the first embodiment. ) Can be easily manufactured. Further, the extinction ratio can be further improved as compared with the case of the two-layer structure. On the other hand, the loss can be reduced as in the case of the one-layer structure.

For example, by executing the same process as the first fixing step S55 and the same process as the first winding step S53 after the second winding step S57 described with reference to FIGS. 10 and 11, the third winding step S57 is executed. The wire grid portion WG3 can be easily formed.

Next, the wire grid 1 having N (N is an integer of 2 or more) wire grid portions will be described. The N wire grid portions are referred to as the first wire grid portion WG1 to the Nth wire grid portion WGN. Further, the first wire grid portion WG1 to the Nth wire grid portion WGN may be collectively referred to as the nth wire grid portion WGn.

The wire grid 1 includes a first wire grid portion WG1 to an Nth wire grid portion WGN and (N-1) spacers. The first wire grid portion WG1 to the Nth wire grid portion WGN include a plurality of first wire WIR1 to a plurality of Nth wire WIRN, respectively.

The first wire WIR1 to the Nth wire WIRN may be collectively referred to as the nth wire WIRN. The configuration of the n-th wire WIRn is the same as the configuration of the first wire 5. The (N-1) spacers are referred to as the first spacer SP1 to the (N-1) spacer SP (N-1). Further, the first spacer SP1 to the (N-1) spacer SP (N-1) may be generically referred to as the nth spacer SPn. The configuration of the nth spacer SPn is the same as the configuration of the spacer 9.

The nth spacer SPn is arranged between the nth wire grid portion WGn and the (n + 1) th (n + 1) wire grid portion WG (n + 1). The plurality of n-th wire WIRn are arranged along the second direction D2 at the first predetermined interval d. The first (n + 1) wire WIR (n + 1) is shifted with respect to the nth wire WIRn by a shift amount p along the second direction D2. The nth wire WIRn and the (n + 1) th wire WIR (n + 1) are arranged with a second predetermined interval L. The nth wire WIRn has a diameter D. The nth spacer SPn has a thickness t. When the nth spacer SPn has a substantially linear shape, the thickness t indicates the diameter of the nth spacer SPn. When the nth spacer SPn has a substantially strip shape, the thickness t indicates the distance between the pair of main surfaces of the nth spacer SPn.

The same conditions as those in the first embodiment can be adopted for the diameter D, the thickness t, the first predetermined interval d, the second predetermined interval L, and the shift amount p. Even when having N wire grid portions (first wire grid portion WG1 to Nth wire grid portion WGN), the shift amount is adjusted by adjusting the thickness t and the material of the nth spacer SPn as in the first embodiment. The p, the first predetermined interval d, and the second predetermined interval L can be easily adjusted.

According to the seventh embodiment, since the first spacer SP1 to the (N-1) spacer SP (N-1) is provided, a plurality of wire grid portions (first wire grid portions WG1 to 1st) are provided as in the first embodiment. The wire grid 1 having the N wire grid portion WGN) can be easily manufactured. Further, as N becomes larger, the extinction ratio can be further improved. On the other hand, the loss can be reduced as in the case of the one-layer structure.

For example, after the second winding step S57 described with reference to FIGS. 10 and 11, a process similar to the first fixing step S55, a process similar to the first winding step S53, and a first fixing step S55 By alternately repeating the same steps as in the second winding step S57 and the same steps as in the second winding step S57, the wire grid 1 having the first wire grid portion WG1 to the Nth wire grid portion WGN can be easily manufactured.

For example, after the second winding step S75 described with reference to FIGS. 12 and 13, a process similar to the first fixing step S73, a process similar to the first winding step S71, and a first fixing step S73. By alternately repeating the same process as in and the same process as in the second winding step S75, two wire grids 1 having the first wire grid portion WG1 to the Nth wire grid portion WGN can be easily manufactured at the same time.

The first spacers SP1 to (N-1) spacers SP (N-1) may be arranged in a substantially wavy shape or may be arranged in a substantially flat shape.

Next, the present invention will be specifically described based on examples, but the present invention is not limited to the following examples.

(Example 1, Example 2)
As Example 1 of the present invention, the two-layer wire grid 1 according to the first embodiment described with reference to FIG. 1 was adopted. As Example 2 of the present invention, the three-layer wire grid 1 according to the seventh embodiment described with reference to FIG. 14 was adopted. As a comparative example, a single-layer wire grid having only one wire grid portion was adopted.

Then, under the following conditions, an electromagnetic field simulation based on the time domain difference method (Finite Difference Time Domain Method) was executed, and the transmission characteristics of Examples 1, 2, and Comparative Examples were obtained.

Electromagnetic field simulations were performed for each of the wire diameter D = 10 μm and diameter D = 100 μm. The shift amount p = D, the first predetermined interval d = 2 × D, and the second predetermined interval L = D.

FIG. 15 is a diagram showing the relationship between the transmittance Te and the frequency of the TE wave according to the first example, the second embodiment, and the comparative example. The horizontal axis shows the frequency, and the vertical axis shows the transmittance Te. The upper part of the horizontal axis shows the scale when D = 100 μm, and the lower part of the horizontal axis shows the scale when D = 10 μm. Further, the transmittance Te of Comparative Example is shown by a curve 51, the transmittance Te of Example 1 is shown by a curve 52, and the transmittance Te of Example 2 is shown by a curve 53.

FIG. 16 is a diagram showing the relationship between the transmittance Tm of the TM wave and the frequency according to the first example, the second embodiment, and the comparative example. In FIG. 16, the horizontal axis represents the frequency and the vertical axis represents the transmittance Tm. The upper part of the horizontal axis shows the scale when D = 100 μm, and the lower part of the horizontal axis shows the scale when D = 10 μm. Further, the transmittance Tm of Comparative Example is shown by a curve 61, the transmittance Tm of Example 1 is shown by a curve 62, and the transmittance Tm of Example 2 is shown by a curve 63.

As shown in FIG. 15, the transmittance Te of the TE wave of the multilayer Example 1 (curve 52) and Example 2 (curve 53) is reduced as compared with the one-layer comparative example (curve 51). However, a relatively high transmittance Te was obtained. That is, the increase in the wire grid portion had almost no effect on the transmittance Te. Further, comparing Example 1 (curve 52) and Example 2 (curve 53), an increase in the number of wire grid portions, that is, an increase in the number of layers, had almost no effect on the transmittance Te.

On the other hand, as shown in FIG. 16, the transmittance Tm of the TE wave of the multilayer Example 1 (curve 62) and Example 2 (curve 63) is higher than that of the single layer Comparative Example (curve 61). , Decreased significantly. Specifically, the transmittance Tm decreased exponentially as the number of wire grid portions increased, that is, as the number of layers increased.

When the wire grid 1 is used as a polarizer, it is preferable to show a high transmittance Te for TE waves and a low transmittance Tm for TM waves. In the first and second embodiments, it is expected that the polarization performance will be dramatically expanded from the results of the electromagnetic field simulations shown in FIGS. 14 and 15.

(Example 3)
As Example 3 of the present invention, the wire grid 1 was manufactured by the manufacturing method according to the third embodiment described with reference to FIGS. 5 and 6. The wire diameter D = 100 μm, the thickness t of the spacer 9a (diameter of the spacer 9a) = 100 μm, and the total number of the first wire 5 and the second wire 7 was about 500. The first wire 5, the second wire 7, and the spacer 9a were tungsten.

FIG. 17 is a photograph showing the wire grid 1 according to the third embodiment. As shown in FIG. 17, the wire grid 1 was manufactured using a pair of substantially linear spacers 9a. The first predetermined interval d = 208 μm of the first wire grid portion WG1, the first predetermined interval d = 208 μm of the second wire grid portion WG2, the second predetermined interval L = 237 μm, and the shift amount p = 100 μm.

(Example 4)
As Example 4 of the present invention, the wire grid 1 was manufactured by the manufacturing method according to the sixth embodiment described with reference to FIGS. 12 and 13. The diameter D of the wire was 10 μm, and the thickness of the spacer 9b was t = 13 μm. The spacer 9b was a food wrap film (manufactured by Kureha Corporation). The first wire 5 and the second wire 7 were tungsten.

FIG. 18A is a photograph showing the wire grid 1 according to the fourth embodiment. FIG. 18B is an enlarged photograph showing the wire grid 1 according to the fourth embodiment. FIG. 18B shows the result of observing the wire grid 1 with a laser microscope.

As shown in FIGS. 18A and 18B, the wire grid 1 was manufactured using a pair of substantially strip-shaped spacers 9b. The first predetermined interval d of the first wire grid portion WG1 was 19.93 μm, the first predetermined interval d of the second wire grid portion WG2 was 19.98 μm, and the second predetermined interval L = 28.27 μm.

Next, the extinction ratio of the wire grid 1 according to Example 4 was measured and compared with the extinction ratio of the wire grid according to Comparative Example 1. The extinction ratio = (TM wave transmittance Tm) / (TE wave transmittance Te). The wire grid according to Comparative Example 1 was a single-layer wire grid having only one wire grid portion. Further, in Comparative Example 1, the wire diameter D = 10 μm and the first predetermined interval d = 25 μm.

In Comparative Example 1, the extinction ratio at 1 THz was 4.6 × 10 ^-4 , and the extinction ratio at 2 THz was 2.2 × 10 ^-3 .

On the other hand, in Example 4, the extinction ratio at 1 THz was 3.8 × 10 ^-8 , and the extinction ratio at 2 THz was 4.7 × 10 ^-7 .

The quenching ratio of Example 4 was improved 10,000 times as compared with Comparative Example 1, and the quenching performance was dramatically improved.

Next, the transmittance of the manufactured wire grid 1 was measured using terahertz time region spectroscopy (THz Domine Spectroscopy).

FIG. 19 is a diagram showing the transmittance of the wire grid 1 according to the fourth embodiment. The upper part of FIG. 19 is a graph showing the relationship between the TE wave transmittance Te and the frequency, and the lower part is a graph showing the relationship between the TM wave transmittance Tm and the frequency. The transmittance Te of Example 4 is indicated by a dot M1, and the transmittance Te of Comparative Example 2 is indicated by a broken line SM1. Further, the transmittance Tm of Example 4 is indicated by a dot M2, and the transmittance Tm of Comparative Example 2 is indicated by a broken line SM2. Comparative Example 2 was a simulation result of a single-layer wire grid having only one wire grid portion when the wire diameter D = 10 μm and the first predetermined interval d = 20 μm.

As shown in FIG. 19, in the TE wave of Example 4, at 2 THz to 3 THz, due to the effect of Fabry-Perot resonance (Fabry-Pérot resonance) between the first wire grid portion WG1 and the second wire grid portion WG2. , The loss was lower than that of Comparative Example 2. The loss was 1-Te.

On the other hand, in the TM wave of Example 4, the transmittance Tm of 1 THz was 10 to ⁸ units, and the performance of Example 4 was improved by 10,000 times as compared with Comparative Example 2.

(Example 5)
In Example 5 of the present invention, the wire grid 1 manufactured by the manufacturing method according to the fifth embodiment described with reference to FIGS. 10 and 11 was adopted. Then, in order to evaluate the quenching performance on the high frequency side, which is difficult to measure by terahertz time region spectroscopy, measurement was performed by Fourier transform infrared spectroscopy (FT / IR-660 + manufactured by JASCO). The light source was unpolarized and gently focused.

A spectrum obtained by arranging a wire grid 1 manufactured by using aluminum foil as the spacer 9b and a wire grid 1 manufactured by using a food wrap film as the spacer 9b on a cross Nicol was measured as a transmission spectrum. In addition, the spectrum when no sample was placed was measured as the background (reference spectrum). Since the polarized wave of the incident wave is unpolarized, the transmittance based on the measured transmission spectrum shows the result of averaging the extinction ratios of the two wire grids 1.

FIG. 20 is a diagram showing the relationship between the extinction ratio and the frequency of the wire grid 1 according to the fifth embodiment. In FIG. 20, the horizontal axis represents the frequency and the vertical axis represents the extinction ratio (transmittance). Dot M3 indicates the extinction ratio of the wire grid 1 according to the fourth embodiment. The dashed line SM3 indicates the extinction ratio obtained by simulation.

The extinguishing ratio of the wire grid 1 according to Example 4 showed a good agreement with the extinguishing ratio obtained by the simulation. Therefore, it could be predicted that the extinction ratio of the wire grid 1 would be plotted on the broken line SM3 even in the region of 0 to 5 THz.

Example 4 and Comparative Example when the extinction ratio was 10 ^{-4 were compared.} The wire grid according to the comparative example was a single-layer wire grid having only one wire grid portion. In the comparative example, the wire diameter D = 10 μm and the first predetermined interval d = 25 μm.

As shown in FIG. 20, in Example 4, when the extinction ratio was 10 ^-4 , the frequency was 4 THz. On the other hand, in the wire grid according to the comparative example, when the extinction ratio was ^10-4 , the frequency was 0.77 THz. As a result, it was confirmed that in Example 4, a broadband width of 5.2 times was realized as compared with the comparative example.

The embodiments and examples of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments and examples, and can be implemented in various embodiments without departing from the gist thereof (for example, (1) to (3) shown below. )). In addition, various inventions can be formed by appropriately combining the plurality of components disclosed in the above embodiments. For example, some components may be removed from all the components shown in the embodiments. In addition, components across different embodiments may be combined as appropriate. In order to make the drawings easier to understand, each component is schematically shown, and the thickness, length, number, spacing, etc. of each component shown are actual for the convenience of drawing creation. May be different. Further, the material, shape, dimensions, etc. of each component shown in the above embodiment are merely examples, and are not particularly limited, and various changes can be made without substantially deviating from the effects of the present invention. is there.

(1) In the first embodiment, a pair of spacers 9 are provided. However, a plurality of a pair of spacers 9 may be provided. The same applies to Embodiments 2 to 7.

(2) In the first embodiment, the diameter and material of the first wire 5 are the same as the diameter and material of the second wire 7, respectively. However, the diameter and / or material of the first wire 5 may be different from the diameter and / or material of the second wire 7. The same applies to Embodiments 2 to 7.

(3) In the third and fourth embodiments, the spacer 9 having a substantially strip shape may be used. Further, in the fifth and sixth embodiments, the spacer 9 having a substantially linear shape may be used. That is, in the second to sixth embodiments, the wire grid 1 can be manufactured by using the spacer 9 of the first embodiment. In the third and fourth embodiments, for example, the thickness t is preferably 1 times or less the diameter D of the first wire 5. Further, in the fifth and sixth embodiments, for example, the thickness t is preferably (√3-1) times (= about 0.7 times) or less the diameter D of the first wire 5.

The present invention relates to a wire grid and a method for manufacturing the wire grid, and has industrial applicability.

1 Wire grid 3 Frame 3A 1st frame 3B 2nd frame 5 1st wire 5B 3rd wire 7 2nd wire 7B 4th wire 9, 9a, 9b, 91 Spacer 9a1, 9b1 1st spacer 9a2, 9b2 1st 2 Spacer WG1 1st wire grid WG2 2nd wire grid WG3 3rd wire grid WG4 4th wire grid WR wire material WR1 1st wire material WR2 2nd wire material WP, WP1, WP2 Wire part

Claims (11)

A wire grid that controls the polarization of terahertz waves as incident waves.
The first wire grid part including a plurality of first wires, and
A second wire grid section that includes a plurality of second wires,
A third wire grid section that includes a plurality of third wires,
A pair of first spacers arranged between the first wire grid portion and the second wire grid portion,
A pair of second spacers arranged between the second wire grid portion and the third wire grid portion are provided.
The plurality of first wires are arranged along one direction at predetermined intervals shorter than the wavelength of the terahertz wave.
The plurality of second wires are arranged along the one direction at the predetermined intervals.
The plurality of third wires are arranged along the one direction at the predetermined intervals.
The first wire and the second wire are alternately located,
The third wire shifts with respect to the second wire by the amount of shift along the one direction.
The pair of first spacers extend along the one direction and are spaced apart from each other along the direction of intersection in the one direction .
The pair of second spacers extend along said one direction, along a direction crossing the one direction Ru are spaced apart from one another, the wire grid. The wire grid according to claim 1, wherein each of the first spacers has a linear shape or a strip shape. The wire grid according to claim 1 or 2, wherein each of the first spacers is a metal or a synthetic resin. The wire grid according to any one of claims 1 to 3, wherein the thickness of each of the first spacers is not more than twice the diameter of the first wire. A method for manufacturing a wire grid that controls the polarization of terahertz waves as incident waves.
The first preparation process to prepare the first frame and
The first wire grid portion and the said so that a pair of first spacers are arranged between the first wire grid portion including the plurality of first wires and the second wire grid portion including the plurality of second wires. A forming step of forming the second wire grid portion in the first frame body, and
The second preparation process to prepare the second frame and
Including a laminating step of laminating the first frame body and the second frame body to form a laminated body.
In the forming step,
The plurality of first wires are arranged along one direction at predetermined intervals shorter than the wavelength of the terahertz wave so that the first wire and the second wire are alternately positioned, and the plurality of first wires are arranged. The two wires are arranged along the one direction at the predetermined intervals,
The pair of first spacers are arranged at intervals from each other along the direction intersecting the one direction so as to extend along the one direction.
The forming step is
The first wire material is wound around the laminated body a plurality of times at the predetermined intervals to form the first wire grid portion in the first frame body and the third wire grid portion in the second frame body. Volume 1 process and
The pair of first spacers is fixed to the first frame body so that the pair of first spacers come into contact with one of the pair of surfaces of the first wire grid portion, and the pair of second spacers A fixing step of fixing the pair of second spacers to the second frame so as to contact one of the pair of surfaces of the third wire grid portion.
The first wire material is placed on the laminate so that the first wire material and the second wire material are alternately positioned while the second wire material is in contact with the pair of first spacers and the pair of second spacers. The second winding step of forming the second wire grid portion in the first frame body and forming the fourth wire grid portion in the second frame body by winding the two wire materials a plurality of times at the predetermined interval. When
Including
A plurality of wire portions of the first wire material, which are wound a plurality of times and arranged in the first frame at predetermined intervals, form the plurality of first wires, respectively.
Wherein the plurality of wires portion arranged at a plurality of times wound the predetermined interval in the first frame body of the second wire material, respectively, that make up the plurality of second wires, the manufacturing method of the wire grid. A method for manufacturing a wire grid that controls the polarization of terahertz waves as incident waves.
The first preparation process to prepare the first frame and
The first wire grid portion and the said so that a pair of first spacers are arranged between the first wire grid portion including the plurality of first wires and the second wire grid portion including the plurality of second wires. A forming step of forming the second wire grid portion in the first frame body, and
Including
In the forming step,
The plurality of first wires are arranged along one direction at predetermined intervals shorter than the wavelength of the terahertz wave so that the first wire and the second wire are alternately positioned, and the plurality of first wires are arranged. The two wires are arranged along the one direction at the predetermined intervals,
The pair of first spacers are arranged at intervals from each other along the direction intersecting the one direction so as to extend along the one direction.
The forming step is
A winding step of winding the wire material a plurality of times around the first frame body to form the first wire grid portion and the second wire grid portion is included.
In the winding process,
The wire material intersects the pair of first spacers and
The pair of wire parts adjacent to each other so that the wire portions arranged along the one direction of the wire material are alternately located on one side and the other side with respect to the pair of first spacers. Through the first spacer of
Of the plurality of wire portions, the plurality of wire portions located on one side of the plurality of wire portions each constitute the plurality of first wires.
Wherein the plurality of wire portions, a plurality of wires portion located on the other side, respectively, constituting the plurality of second wires, the manufacturing method of the word ear grid. A method for manufacturing a wire grid that controls the polarization of terahertz waves as incident waves.
The first preparation process to prepare the first frame and
The first wire grid portion and the said so that a pair of first spacers are arranged between the first wire grid portion including the plurality of first wires and the second wire grid portion including the plurality of second wires. A forming step of forming the second wire grid portion in the first frame body, and
The second preparation process to prepare the second frame and
A laminating step of laminating the first frame body and the second frame body to form a laminated body.
Only including,
In the forming step,
The plurality of first wires are arranged along one direction at predetermined intervals shorter than the wavelength of the terahertz wave so that the first wire and the second wire are alternately positioned, and the plurality of first wires are arranged. The two wires are arranged along the one direction at the predetermined intervals,
The pair of first spacers are arranged at intervals from each other along the direction intersecting the one direction so as to extend along the one direction.
The forming step is
The wire material is wound around the laminate a plurality of times to form the first wire grid portion and the second wire grid portion in the first frame body, and the third wire grid and the fourth wire grid are formed in the second frame body. Including the winding process to form on the frame
In the winding process,
The wire material intersects the pair of first spacers arranged in the first frame body, and the wire material intersects the pair of first spacers.
The wires adjacent to each other so that the wire portions arranged in the first frame along the one direction of the wire material are alternately located on one side and the other side with respect to the pair of first spacers. Pass the pair of first spacers between the portions,
The wire material intersects a pair of second spacers arranged in the second frame body,
The wires adjacent to each other so that the wire portions arranged in the second frame along the one direction of the wire material are alternately located on one side and the other side with respect to the pair of second spacers. Pass the pair of second spacers between the portions,
Of the plurality of wire portions arranged in the first frame body, the plurality of wire portions located on one side of the wire portions each constitute the plurality of first wires.
Wherein the plurality of wire portions, a plurality of wires portion located on the other side, respectively, constituting the plurality of second wires, the manufacturing method of the word ear grid arranged in the first frame. A method for manufacturing a wire grid that controls the polarization of terahertz waves as incident waves.
The first preparation process to prepare the first frame and
The first wire grid portion and the said so that a pair of first spacers are arranged between the first wire grid portion including the plurality of first wires and the second wire grid portion including the plurality of second wires. A forming step of forming the second wire grid portion in the first frame body, and
Including
In the forming step,
The plurality of first wires are arranged along one direction at predetermined intervals shorter than the wavelength of the terahertz wave so that the first wire and the second wire are alternately positioned, and the plurality of first wires are arranged. The two wires are arranged along the one direction at the predetermined intervals,
The pair of first spacers are arranged at intervals from each other along the direction intersecting the one direction so as to extend along the one direction.
The forming step is
The first winding step of forming the first wire grid portion by winding the first wire material around the first frame body a plurality of times at the predetermined intervals.
A fixing step of fixing the pair of first spacers to the first frame body so that the pair of first spacers come into contact with one of the pair of surfaces of the first wire grid portion.
The second wire material is placed on the first frame so that the first wire material and the second wire material are alternately positioned while the second wire material is in contact with the pair of first spacers. Including the second winding step of forming the second wire grid portion by winding a plurality of times at intervals.
A plurality of wire portions of the first wire material, which are wound a plurality of times and arranged at a predetermined interval, form the plurality of first wires, respectively.
Wherein the plurality of times wound a plurality of wire segment aligned at the predetermined intervals of the second wire material, respectively, constituting the plurality of second wires, the manufacturing method of the word ear grid. The method for manufacturing a wire grid according to any one of claims 5 to 8 , wherein each of the first spacers has a linear shape or a strip shape. The method for manufacturing a wire grid according to any one of claims 5 to 9 , wherein each of the first spacers is a metal or a synthetic resin. The method for manufacturing a wire grid according to any one of claims 5 to 10 , wherein the thickness of each of the first spacers is not more than twice the diameter of the first wire.

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