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WO2009157273A1 - Système optique d'imagerie, procédé de fabrication de lentille d'imagerie - Google Patents

Système optique d'imagerie, procédé de fabrication de lentille d'imagerie Download PDF

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Publication number
WO2009157273A1
WO2009157273A1 PCT/JP2009/059962 JP2009059962W WO2009157273A1 WO 2009157273 A1 WO2009157273 A1 WO 2009157273A1 JP 2009059962 W JP2009059962 W JP 2009059962W WO 2009157273 A1 WO2009157273 A1 WO 2009157273A1
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WO
WIPO (PCT)
Prior art keywords
glass substrate
optical system
cut coat
imaging optical
imaging
Prior art date
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Ceased
Application number
PCT/JP2009/059962
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English (en)
Japanese (ja)
Inventor
節夫 徳弘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Opto Inc
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Konica Minolta Opto Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Konica Minolta Opto Inc filed Critical Konica Minolta Opto Inc
Priority to JP2010517835A priority Critical patent/JPWO2009157273A1/ja
Priority to CN200980115664XA priority patent/CN102016654A/zh
Publication of WO2009157273A1 publication Critical patent/WO2009157273A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/208—Filters for use with infrared or ultraviolet radiation, e.g. for separating visible light from infrared and/or ultraviolet radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/281—Interference filters designed for the infrared light

Definitions

  • the present invention relates to an imaging optical system and a method for manufacturing an imaging lens.
  • a plurality of curable resin lens portions are provided on a wafer-shaped glass substrate (so-called “wafer lens” is manufactured), and the wafer-shaped glass substrate is cut into each lens portion.
  • an IR (Infrared Rays) cut coat is formed on a glass substrate of an imaging lens.
  • Patent Document 1 There is a description that an IR cut coat is formed on at least one surface.
  • the IR cut coat is formed on both sides from the description that the IR cut coat is formed on at least one side. Since there is no mention of warping and intentional mention of no countermeasure, there is a possibility that the glass substrate is warped by the stress of the film.
  • a problem to be solved by the present invention is to provide an imaging optical system and a method for manufacturing an imaging lens that can suppress warping of the glass substrate.
  • An imaging optical system having an imaging lens in which a lens portion made of a curable resin is formed on a glass substrate, Having at least one group of the imaging lenses, An imaging optical system, wherein an IR cut coat is formed on each of the front and back surfaces of the glass substrate.
  • the total film thickness ratio r of the total film thickness r1 of the IR cut coat formed on one surface of the glass substrate and the total film thickness r2 of the IR cut coat formed on the other surface of the glass substrate is expressed by the formula An imaging optical system characterized by satisfying the condition (1).
  • the IR cut coat is an alternating multilayer film in which a plurality of low refractive index layers A made of a low refractive index material and high refractive index layers B made of a high refractive index material are alternately stacked.
  • the total film thickness ratio r (A2) to the total film thickness r (A2) satisfies the condition of the formula (2), and the high refractive index layer of the IR cut coat formed on one surface of the glass substrate
  • the total film thickness ratio r (B) between the total film thickness r (B1) of B1 and the total film thickness r (B2) of the high refractive index layer B2 of the IR cut coat formed on the other surface of the glass substrate is An imaging optical system characterized by satisfying the condition of Expression (3).
  • the thickness of the peripheral portion formed on one surface of the glass substrate is t2
  • the total film thickness of the IR cut coat formed on one surface of the glass substrate is r1
  • the total film thickness of the IR cut coat formed on the other surface of the glass substrate is r2
  • the imaging optical system according to any one of 1 to 4, Having two or more groups of imaging lenses; Of the imaging lenses, an imaging optical system in which the imaging lens in which the IR cut coat is not formed on a glass substrate is disposed on the image plane side.
  • the curable resin is a photocurable resin
  • the imaging optical system, wherein the IR cut coat has a transmittance of 50% or more with respect to light having a wavelength of 365 nm.
  • a method for manufacturing an imaging lens comprising:
  • the IR cut coat is formed on both the front and back surfaces of the glass substrate, the warp of the glass substrate during the IR cut coat film formation on one surface of the glass substrate is caused on the other surface. It is offset by the warp of the glass substrate during the IR cut coat film formation, and the warp of the glass substrate can be suppressed.
  • FIG. 4 is a view for explaining a schematic manufacturing method of an imaging unit according to a preferred embodiment of the present invention, which is a drawing subsequent to FIG. 3.
  • FIG. 4 is a schematic sectional drawing which shows the modification of the imaging optical system which concerns on preferable embodiment of this invention. It is drawing which shows the rough relationship between the wavelength of coat
  • the imaging optical system of the present invention is an imaging optical system having an imaging lens in which a lens portion made of a curable resin is formed on a glass substrate, and has at least one group of the imaging lenses.
  • An IR cut coat is formed on each of the front and back surfaces.
  • the imaging unit 1 mainly includes a lens unit 2, a sensor device 4, and a casing 5, and the lens unit 2 and the sensor device 4 are covered with the casing 5. It has a configuration.
  • the casing 5 includes a cylindrical cylindrical portion 51 and a rectangular parallelepiped base portion 53.
  • the cylindrical portion 51 and the base portion 53 are integrally formed, and the cylindrical portion 51 is erected on the base portion 53.
  • the lens unit 2 is arranged inside the cylindrical portion 51.
  • a circular light transmission hole 51 a is formed in the top plate portion of the cylindrical portion 51.
  • the sensor device 4 is disposed in the base portion 53 (bottom portion). For example, a CCD or CMOS is used as the sensor device 4.
  • the lens unit 2 is mainly composed of a diaphragm 21, an imaging lens 23, and a spacer 25. These members are overlapped with each other in a state in which the imaging lens 23 is disposed between the diaphragm 21 and the spacer 25.
  • the central portion of the imaging lens 23 has a convex shape on both the front and back surfaces, and this portion basically exhibits an optical function.
  • the diaphragm 21 is a member that adjusts the amount of light incident on the imaging lens 23, and a circular opening 21a is formed at the center thereof.
  • the spacer 25 is a member for adjusting the arrangement position (height position) of the lens unit 2 in the cylindrical portion 51 of the casing 5, and a circular opening 25 a (see the upper part of FIG. 1) is also formed at the center thereof. ing.
  • the imaging lens 23 has a glass substrate 100.
  • An IR cut coat 110 is formed on the front surface 102 of the glass substrate 100, and an IR cut coat 120 is also formed on the back surface 104 of the glass substrate 100.
  • the IR cut coats 110 and 120 are films for shielding infrared rays, and have a transmittance of 50% or more for light having a wavelength of 365 nm.
  • the IR cut coats 110 and 120 are formed by alternately laminating a plurality of low refractive index layers A1 and A2 made of a low refractive index material and high refractive index layers B1 and B2 made of a high refractive index material. It is an alternating multilayer film.
  • the low refractive index layers A1 and A2 are preferably in direct contact with the glass substrate 100.
  • the low refractive index material constituting the low refractive index layers A1 and A2 SiO 2 or the like is used.
  • the high-refractive index material constituting the high refractive index layer B1 B2 TiO 2, Ta 2 O 5, Nb 2 O 3, ZrO 2 and the like are used.
  • the low refractive index layers A1 and A2 may be made of different materials, and the high refractive index layers B1 and B2 may be made of different materials.
  • the IR cut coats 110 and 120 are usually composed of about 10 to 40 layers, but the number of layers may be the same or different.
  • the total film thickness r 1 of the IR cut coat 110 formed on the front surface 102 of the glass substrate 100 and the total film thickness r 2 of the IR cut coat 120 formed on the back surface 104 of the glass substrate 100 are preferable.
  • the total film thickness ratio r satisfies the condition of the formula (1).
  • the total film thickness ratio r (A) with the total film thickness r (A2) of the low refractive index layer A2 of the cut coat 120 satisfies the condition of the formula (2) and is formed on the surface 102 of the glass substrate 100.
  • the total film thickness ratio r (B) satisfies the condition of Expression (3).
  • a resin portion 130 is formed on the IR cut coat 110.
  • the resin part 130 is composed of a curable resin 130A.
  • the resin part 130 has a lens part 132 having a convex shape and a peripheral part 134 covering the periphery thereof, and the lens part 132 and the peripheral part 134 are integrally formed.
  • the resin part 140 is also formed under the IR cut coat 120.
  • the resin part 140 is composed of a curable resin 140A.
  • the resin part 140 has a lens part 142 having a convex shape and a peripheral part 144 covering the periphery thereof, and the lens part 142 and the peripheral part 144 are integrally formed.
  • IR In the imaging lens 23, when the thickness of the peripheral portion 134 formed on the front surface 102 side of the glass substrate 100 is t1, and the thickness of the peripheral portion 144 formed on the back surface 104 of the glass substrate 100 is t2, IR In the relationship between the total film thickness r1 of the cut coat 110 and the total film thickness r2 of the IR cut coat 120, the condition of formula (4) or formula (5) is satisfied.
  • the resin parts 130 and 140 (lens parts 132 and 142) in any one side among the surface 102 and the back surface 104 of the glass substrate 100.
  • the lens portion is provided only on one side of the glass substrate 100, and the IR cut coat on the side where the lens portion is not provided (for example, the IR cut coat 110) on the side where the lens portion is provided (for example, the IR cut coat 110).
  • the IR cut coat 120 it is possible to suppress the stress bias of the entire imaging lens 23 and further suppress the warpage.
  • a photocurable resin can be used, and preferably an acrylic resin, an allyl ester resin, an epoxy resin, or the like can be used.
  • the usable resin will be described below.
  • (1) Acrylic resin The (meth) acrylate used for the polymerization reaction is not particularly limited, and the following (meth) acrylate produced by a general production method can be used.
  • (Meth) acrylate having an alicyclic structure is particularly preferable, and may be an alicyclic structure containing an oxygen atom or a nitrogen atom.
  • 2-alkyl-2-adamantyl (meth) acrylate (refer to Japanese Patent Laid-Open No. 2002-193883), adamantyl di (meth) acrylate (Japanese Patent Laid-Open No. 57-5000785), diallyl adamantyl dicarboxylate (Japanese Patent Laid-Open No. 60-100537).
  • Perfluoroadamantyl acrylate see JP 2004-123687
  • a curable resin having an adamantane skeleton see JP 2001-322950 A), bis (hydroxyphenyl) adamantanes and bis (glycidyloxyphenyl) adamantane (JP 11-35522 A, JP 10-130371 A). For example).
  • (meth) acrylate for example, methyl acrylate, methyl methacrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, isobutyl acrylate, isobutyl methacrylate, tert-butyl acrylate Tert-butyl methacrylate, phenyl acrylate, phenyl methacrylate, benzyl acrylate, benzyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, and the like.
  • polyfunctional (meth) acrylate examples include trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, dipentaerythritol penta (meth) ) Acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol tri (meth) acrylate, tripentaerythritol octa (meth) acrylate, tripentaerythritol septa (meth) acrylate, tripentaerythritol hexa (meth) acrylate, tripenta Erythritol penta (meth) acrylate, tripentaerythritol tetra (meth) acrylate, tripent
  • Bromine-containing (meth) allyl ester not containing an aromatic ring see JP-A-2003-66201
  • allyl (meth) acrylate see JP-A-5-286896
  • allyl ester resin JP-A-5-286896
  • JP 2003-66201 A a copolymer of an acrylate ester and an epoxy group-containing unsaturated compound
  • JP 2003-128725 A an acrylate compound
  • an acrylic And ester compounds see JP 2005-2064 A.
  • Epoxy resin is not particularly limited as long as it has an epoxy group and is polymerized and cured by light or heat, and an acid anhydride, a cation generator, or the like can be used as a curing initiator.
  • Epoxy resin is preferable in that it has a low cure shrinkage and can be a lens with excellent molding accuracy.
  • Examples of the epoxy include novolak phenol type epoxy resin, biphenyl type epoxy resin, and dicyclopentadiene type epoxy resin.
  • Examples include bisphenol F diglycidyl ether, bisphenol A diglycidyl ether, 2,2′-bis (4-glycidyloxycyclohexyl) propane, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, vinyl Cyclohexene dioxide, 2- (3,4-epoxycyclohexyl) -5,5-spiro- (3,4-epoxycyclohexane) -1,3-dioxane, bis (3,4-epoxycyclohexyl) adipate, 1,2 -Cyclopropanedicarboxylic acid bisglycidyl ester and the like.
  • the curing agent is used for constituting the curable resin material and is not particularly limited. Moreover, in this invention, when comparing the transmittance
  • an acid anhydride curing agent, a phenol curing agent, or the like can be preferably used.
  • acid anhydride curing agents include phthalic anhydride, maleic anhydride, trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, 3-methyl-hexahydrophthalic anhydride, 4-methyl-hexahydrophthalic anhydride
  • acid anhydride curing agents include phthalic anhydride, maleic anhydride, trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, 3-methyl-hexahydrophthalic anhydride, 4-methyl-hexahydrophthalic anhydride
  • examples thereof include an acid, a mixture of 3-methyl-hexahydrophthalic anhydride and 4-methyl-hexahydrophthalic anhydride, tetrahydrophthalic anhydride, nadic anhydride, and methyl nadic anhydride.
  • a hardening accelerator is contained as needed.
  • the curing accelerator is not particularly limited as long as it has good curability, is not colored, and does not impair the transparency of the thermosetting resin.
  • 2-ethyl-4-methylimidazole is not limited. Imidazoles such as (2E4MZ), tertiary amines, quaternary ammonium salts, bicyclic amidines such as diazabicycloundecene and their derivatives, phosphines, phosphonium salts, etc. can be used, Two or more kinds may be mixed and used.
  • the imaging unit 1 described above external light enters the lens unit 2 through the light transmission hole 51 a, the amount of incident light is adjusted by the opening 21 a of the diaphragm 21, passes through the imaging lens 23, and opens the spacer 25. The light is emitted from the portion 25a. Thereafter, the emitted light is configured to enter the sensor device 4.
  • a wafer-like glass substrate 100 is prepared, and IR cut coats 110 and 120 are formed on the front surface 102 and the back surface 104, respectively.
  • a method for forming the IR cut coats 110 and 120 a known vacuum deposition method, sputtering, a CVD (Chemical Vapor Deposition) method, or the like is used.
  • silane coupling treatment is performed on the IR cut coats 110 and 120 for the purpose of improving the adhesion of the resin portions 130 and 140 to the IR cut coats 110 and 120.
  • a silane coupling agent SZ-6030 manufactured by Toray Dow Corning
  • acetic acid is added to adjust the pH to 3 to 5.
  • the solution is applied on the IR cut coat 110, 120 and dried.
  • the IR cut coats 110 and 120 are formed with chemically bonded surfaces by silanol bonds.
  • the surface has good adhesion to the curable resin (130A, 140A), and the adhesion to the resin portions 130, 140 formed on the IR cut coats 110, 120 is greatly improved.
  • the cavity 202 of the mold 200 is filled with a curable resin 130A.
  • the curable resin 130A is placed on the upper part of the mold 200, and the glass substrate 100 is moved downward while pressing it, and the cavity 202 is filled with the curable resin 130A.
  • the curable resin 130A may be filled while evacuating. If the curable resin 130A is filled while evacuating, bubbles can be prevented from being mixed into the curable resin 130A.
  • the light source 210 disposed above the mold 200 is turned on, and the curable resin 130A is irradiated with light to cure the curable resin 130A.
  • a high pressure mercury lamp, a metal halide lamp, a xenon lamp, a halogen lamp, a fluorescent lamp, a black light, a G lamp, an F lamp, or the like can be used, and a linear light source or a point light source may be used. Good.
  • a plurality of linear or point light sources 210 may be arranged in a lattice shape so that the light reaches the curable resin 130A at one time, or linear or dotted.
  • the light source 210 may be scanned in parallel with the glass substrate 100 so that the light sequentially reaches the curable resin 130A.
  • a luminance distribution and an illuminance (intensity) distribution during light irradiation are measured, and the number of irradiations, irradiation amount, irradiation time, and the like are controlled based on the measurement results.
  • the IR cut coats 110 and 120 have a transmittance of 50% or more with respect to light having a wavelength of 365 nm. In other words, the IR cut coat 110, 120 is not a factor that hinders the curing of the curable resin 130A.
  • the light source 210 disposed below the mold 200 is also turned on, and both sides of the glass substrate 100 side and the mold 200 side are turned on. May be irradiated with light.
  • the resin portion 130 (lens portion 132) is formed on the surface 102 of the glass substrate 100.
  • the glass substrate 100 is released from the mold 200.
  • the glass substrate 100 is turned over and the curable resin 140 ⁇ / b> A is placed on the mold 200 in the same manner as the resin portion 130 is formed on the surface 102 of the glass substrate 100.
  • the substrate 100 is pressed, and the curable resin 140 ⁇ / b> A is irradiated with light to form the resin portion 140 (lens portion 142) on the back surface 104 of the glass substrate 100.
  • the lens array 27 in the upper part of FIG. 4 is manufactured by the above processing.
  • the IR cut coats 110 and 120 are omitted for the sake of clarity.
  • the aperture array 26 in which the same number of openings 21 a as the lens portions 132 are formed, and the same number as the lens portions 142.
  • the spacer array 28 in which the openings 25a are formed is prepared.
  • the aperture array 26 and the spacer array 28 are formed by mixing a curable resin with carbon and coloring it black, and molding the resin by an injection molding method.
  • the aperture array 26 and the spacer array 28 are joined to the lens array 27 with an adhesive to manufacture the lens unit array 29.
  • the lens unit array 29 is individually separated for each of the lens portions 132 and 142 by an end mill to produce a plurality of lens units 2, and each lens unit 2 is a cylinder of the casing 5.
  • the imaging unit 1 is manufactured by being assembled (bonded) to the part 51.
  • the IR cut coats 110 and 120 are formed on the front surface 102 and the back surface 104 of the glass substrate 100, respectively.
  • the film stress when the IR cut coat 110 is formed can be relaxed by forming the IR cut coat 120 on the other surface (back surface 104).
  • the warp of the glass substrate 100 when forming the IR cut coat 110 on one surface (front surface 102) of the glass substrate 100 is the glass substrate 100 when forming the IR cut coat 120 on the other surface (back surface 104).
  • the warpage of the glass substrate 100 as a whole can be suppressed.
  • the conditions of the above formulas (1) to (3) are satisfied (the total film thickness of the IR cut coats 110 and 120, the total film thickness of the low refractive index layers A1 and A2, the high refractive index layers B1 and B2, etc.) If the surface 102 and the back surface 104 of the glass substrate 100 are substantially the same), the warping and bending of the glass substrate 100 can be more accurately suppressed.
  • the IR cut coats 110 and 120 are respectively formed on the front surface 102 and the back surface 104 of the glass substrate 100, so that the IR region that can be shielded by the IR cut coat 110 and the IR cut coat 120 are used. It is also possible to block infrared light in a wide infrared region over two infrared regions, which can be shielded from light outside the century.
  • imaging optics is configured by a plurality of groups (two or more groups) of imaging lenses. A system may be configured.
  • the imaging optical system shown in FIG. 5 includes three groups of imaging lenses 300, 400, and 500.
  • the imaging lens 300 has a glass substrate 310, an IR cut coat 110 is formed on the front surface 312, and an IR cut coat 120 is formed on the back surface 314 thereof.
  • a resin part 320 is formed on the IR cut coat 110, and a resin part 330 is formed on the IR cut coat 120.
  • the imaging lens 400 has a glass substrate 410, and a resin portion 420 is formed on the front surface 412 and a resin portion 430 is formed on the back surface 414 thereof.
  • the imaging lens 500 also has a glass substrate 510, and a resin portion 520 is formed on the front surface 512 and a resin portion 530 is formed on the back surface 514 thereof.
  • the glass substrates 310, 410, and 510 correspond to the glass substrate 100 of the imaging lens 23, and the resin portions 320, 330, 420, 430, 520, and 530 correspond to the resin portions 130 and 140 of the imaging lens 23. Is.
  • the IR cut coats 110 and 120 are formed in the imaging lens 300 arranged at the position farthest from the sensor device 4 (the IR cut coats 110 and 120 are formed on the glass substrate 410 of the imaging lens 400.
  • the IR cut coats 110 and 120 are not formed in the imaging lens 500 disposed at the closest position facing the sensor device 4. That is, the imaging lens 500 on which the IR cut coats 110 and 120 are not formed is disposed on the image plane side.
  • the IR cut coats 110 and 120 are alternately laminated films of a total of about 10 to 40 low-refractive index films, and in the middle of forming a multilayer film of this degree by vacuum deposition,
  • dust of about several ⁇ m or the like is mixed as contamination in the film and becomes a problem as surface foreign matter. If this foreign matter forms an image on the surface of the sensor device 4, the foreign matter is reflected in the image, which causes a problem. In particular, the closer the sensor surface is, the more light is collected, and the allowable foreign matter size is severe. Become.
  • a lens part made of a photocurable resin having a predetermined shape is formed on each front and back surfaces of each of three glass substrates (planar glass wafer, size 8 inches, thickness 3 mm), and imaging lens Formed.
  • a UV lamp of 6000 mJ / cm 2 was irradiated.
  • the imaging lenses were bonded to each other via a spacer to produce a plurality of imaging optical systems similar to those in FIG.
  • Example 1 Among a plurality of imaging optical systems, the IR cut coat of “Coat Type I” in Table 1 is applied to the front surface (a surface) of the glass substrate of the first imaging lens, and “ The sample of “Example 1” was formed with an IR cut coat of “Coat Type Type II”.
  • a glass substrate is placed in a vacuum vapor deposition apparatus, and the surface (a surface) on one side is low refractive by vacuum vapor deposition in the manner shown in “Coat Type I” in Table 1.
  • An SiO 2 film as a refractive index layer and a TiO 2 film as a high refractive index layer were alternately laminated (18 layers in total) to form an IR cut coat.
  • the vacuum deposition apparatus was once opened to the atmosphere, the glass substrate was inverted, and the IR cut coat was formed on the surface.
  • the IR cut coat was formed in the mode shown in “II” (the IR cut coat forming method was the same in Examples 2 to 6 and Comparative Example 1 described later).
  • the glass substrate is taken out from the vacuum deposition apparatus and subjected to a silane coupling treatment on the IR cut coat (a silane coupling agent (SZ-6030 manufactured by Toray Dow Corning Co., Ltd.) is added in 0.1% with ethanol. Dilute to ⁇ 2.0wt%, add acetic acid to adjust pH to 3 ⁇ 5, apply the solution on IR cut coat and dry) A lens portion made of a photocurable resin having a predetermined shape was formed.
  • a silane coupling agent SZ-6030 manufactured by Toray Dow Corning Co., Ltd.
  • Example 2 Among the plurality of imaging optical systems, the IR cut coat of “Coat Type I” in Table 1 is applied to the surface (c surface) of the glass substrate of the second imaging lens, and “ An IR cut coat of “Coat Type Type II” was formed, and the lens unit was used as a sample of “Example 2”.
  • Example 3 Among a plurality of imaging optical systems, the IR cut coat of “Coat Type I” in Table 1 is applied to the surface (e surface) of the glass substrate of the third imaging lens, and “ An IR cut coat of “Coat Type Type II” was formed, and the lens unit was used as a sample of “Example 3”.
  • Example 4 Among a plurality of imaging optical systems, the IR cut coat of “Coat Type III” in Table 2 is applied to the front surface (a surface) of the glass substrate of the first imaging lens, and “ The sample of “Example 4” was formed with an IR cut coat of “coat type IV”.
  • Example 5 Among the plurality of imaging optical systems, the IR cut coat of “Coat Type V” in Table 3 is applied to the front surface (a surface) of the glass substrate of the first imaging lens, and “ The sample of Example 5 was formed with an IR cut coat of “Coat Type Type VI”.
  • Example 6 when forming the IR cut coat TiO 2 film, the film formation rate was 8 ⁇ / sec, and the film formation rate of the TiO 2 film was larger than those of the coat type types I to IV. In this case, the transmittance of the IR cut coat with respect to light having a wavelength of 365 nm decreases (see Table 4). (1.7) Example 6 Among the plurality of imaging optical systems, the IR cut coat of “Coat Type I” in Table 3 is applied to the front surface (a surface) of the glass substrate of the first imaging lens, and “ The sample of Example 6 was formed with an IR cut coat of “Coat Type Type II”.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Lens Barrels (AREA)
  • Surface Treatment Of Glass (AREA)
  • Lenses (AREA)

Abstract

L'invention porte sur un système optique d'imagerie capable de supprimer le gauchissement et la flexion d'un substrat en verre. L'invention porte également sur un procédé de fabrication de lentille d'imagerie. Le système optique d'imagerie comprend une lentille d'imagerie ayant une partie de lentille faite d'une résine durcissable sur le substrat en verre. Le système optique d'imagerie est caractérisé en ce qu'il comprend au moins un groupe de lentilles d'imagerie et en ce qu'il a des revêtements de découpe par IR formés individuellement à la fois sur les surfaces avant et arrière du substrat en verre.
PCT/JP2009/059962 2008-06-25 2009-06-01 Système optique d'imagerie, procédé de fabrication de lentille d'imagerie Ceased WO2009157273A1 (fr)

Priority Applications (2)

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JP2010517835A JPWO2009157273A1 (ja) 2008-06-25 2009-06-01 撮像光学系及び撮像用レンズの製造方法
CN200980115664XA CN102016654A (zh) 2008-06-25 2009-06-01 成像光学系统及成像用透镜的制造方法

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JP2008165424 2008-06-25
JP2008-165424 2008-06-25

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WO2009157273A1 true WO2009157273A1 (fr) 2009-12-30

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Cited By (60)

* Cited by examiner, † Cited by third party
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