TWI693445B - Wide-angle lens assembly - Google Patents

Abstract

A wide-angle lens assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens. The first, second, and third lenses are meniscus lenses with negative refractive power. The fourth lens is with refractive power and includes a concave surface facing an object side. The fifth and sixth lenses are with positive refractive power. The seventh lens is with refractive power and includes a concave surface facing the object side. The eighth lens is with positive refractive power. The ninth lens is with negative refractive power. The tenth lens is with refractive power and includes a concave surface facing an image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens, and the tenth lens are arranged in order from the object side to the image side along an optical axis.

Description

Wide-angle lens (24)

The invention relates to a wide-angle lens.

The development trend of today's wide-angle lens, in addition to the continuous development of a large field of view, with different application requirements, it also needs to have high resolution and resistance to environmental temperature changes. The conventional wide-angle lens can no longer meet today's needs. Another wide-angle lens with a new architecture can meet the needs of large field of view, high resolution and resistance to environmental temperature changes at the same time.

In view of this, the main purpose of the present invention is to provide a wide-angle lens, which has a larger field of view, higher resolution, and resistance to environmental temperature changes, but still has good optical performance.

The wide-angle lens of the present invention includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and One tenth lens. The first lens has a negative refractive power and is a meniscus lens. The second lens has a negative refractive power and is a meniscus lens. The third lens has a negative refractive power and is a meniscus lens. The fourth lens has refractive power and includes a concave surface facing an object side. The fifth lens has positive refractive power. The sixth lens has positive refractive power. The seventh lens has refractive power and includes a concave surface facing the object side. The eighth lens has positive refractive power. The ninth lens has negative refractive power. The tenth lens has refractive power and includes a concave surface facing an image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens The mirror, sixth lens, seventh lens, eighth lens, ninth lens, and tenth lens are sequentially arranged along the optical axis from the object side to the image side.

The first lens includes a convex surface facing the object side and a concave surface facing the image side, the second lens includes a convex surface facing the object side and a concave surface facing the image side, and the third lens includes a concave surface facing the object side and a convex surface facing the image side. The four lenses have positive refractive power and may further include a convex surface facing the image side, the fifth lens includes a convex surface facing the object side and another convex surface facing the image side, and the sixth lens includes a convex surface facing the object side and another convex surface facing the image side, the first The seventh lens has positive refractive power and further includes a convex surface facing the image side, the eighth lens includes a convex surface facing the object side and the other convex surface facing the image side, the ninth lens includes a concave surface facing the object side and a plane facing the image side, the tenth The lens has positive refractive power and may further include a convex surface facing the object side.

The first lens includes a convex surface facing the object side and a concave surface facing the image side, the second lens includes a convex surface facing the object side and a concave surface facing the image side, and the third lens includes a concave surface facing the object side and a convex surface facing the image side. The four lenses have positive refractive power and may further include a convex surface facing the image side, the fifth lens includes a convex surface facing the object side and another convex surface facing the image side, the sixth lens includes a convex surface facing the object side and another convex surface facing the image side, the first The seventh lens has positive refractive power and may further include a convex surface facing the image side, the eighth lens includes a convex surface facing the object side and another convex surface facing the image side, the ninth lens includes a concave surface facing the object side and a convex surface facing the image side, the tenth The lens has positive refractive power and may further include a convex surface facing the object side.

The third lens is cemented with the fourth lens, and the eighth lens is cemented with the ninth lens.

The wide-angle lens satisfies the following conditions: 11<TTL/f<14; where f is one of the effective focal lengths of the wide-angle lens, and TTL is the distance from the object side of the first lens to an imaging plane on the optical axis.

The wide-angle lens satisfies the following conditions: 0.7<TTL/θ<0.82; where TTL is the distance between the object side of the first lens and an imaging surface on the optical axis, the unit of this distance is mm, and θ is the half-view of the wide-angle lens Field, the unit of this half field of view is degrees.

The wide-angle lens satisfies the following conditions: 6<f ₅ /f<8.5; where f is one of the effective focal lengths of the wide-angle lens, and f ₅ is one of the effective focal lengths of the fifth lens.

The wide-angle lens satisfies the following conditions: 12.03<TTL/f<12.93; where f is one of the effective focal lengths of the wide-angle lens, and TTL is the distance from the object side of the first lens to an imaging plane on the optical axis.

The wide-angle lens satisfies the following conditions: 0.74<TTL/θ<0.79; where, TTL is the distance between the object side of the first lens and an imaging surface on the optical axis, the unit of this distance is mm, and θ is the half-view of the wide-angle lens Field, the unit of this half field of view is degrees.

The wide-angle lens satisfies the following conditions: 6.31<f ₅ /f<7.98; where f is one of the effective focal lengths of the wide-angle lens, and f ₅ is one of the effective focal lengths of the fifth lens.

In order to make the above objects, features, and advantages of the present invention more comprehensible, preferred embodiments are described in detail below in conjunction with the accompanying drawings.

1, 2, 3‧‧‧ wide-angle lens

L11, L21, L31 ‧‧‧ first lens

L12, L22, L32 ‧‧‧ second lens

L13, L23, L33 ‧‧‧ third lens

L14, L24, L34 ‧‧‧ fourth lens

L15, L25, L35 ‧‧‧ fifth lens

ST1, ST2, ST3 ‧‧‧ aperture

L16, L26, L36 ‧‧‧ sixth lens

L17, L27, L37 ‧‧‧ seventh lens

L18, L28, L38‧Eighth lens

L19, L29, L39 ‧‧‧ ninth lens

L110, L210, L310 ‧‧‧ tenth lens

OF1, OF2, OF3 ‧‧‧ filter

CG1, CG2, CG3‧‧‧protective glass

IMA1, IMA2, IMA3 ‧‧‧ imaging surface

OA1, OA2, OA3 ‧‧‧ optical axis

S11, S21, S31‧‧‧Object side of the first lens

S12, S22, S32 ‧‧‧ Image side of the first lens

S13, S23, S33

S14, S24, S34 ‧‧‧ second lens image side

S15, S25, S35

S16, S26, S36 ‧‧‧ Image side of third lens (object side of fourth lens)

S17, S27, S37 ‧‧‧ fourth lens image side

S18, S28, S38

S19, S29, S39 ‧‧‧ fifth lens image side

S110, S210, S310

S111, S211, S311-Object side of sixth lens

S112, S212, S312‧‧‧‧Sixth lens image side

S113, S213, S313‧‧‧Object side of seventh lens

S114, S214, S314‧‧‧‧Seventh lens image side

S115, S215, S315

S116, S216, S316-The eighth lens image side (ninth lens object side)

S117, S217, S317 ‧‧‧ ninth lens image side

S118, S218, S318 ‧‧‧ tenth lens side

S119, S219, S319 ‧‧‧ tenth lens image side

S120, S220, S320 ‧‧‧ filter side

S121, S221, S321 ‧‧‧ filter image side

S122, S222, S322

S123, S223, S323

FIG. 1 is a schematic diagram of the lens configuration and optical path of the first embodiment of the wide-angle lens according to the present invention.

FIG. 2A is a field curvature diagram of the first embodiment of the wide-angle lens according to the present invention.

FIG. 2B is a distortion diagram of the first embodiment of the wide-angle lens according to the present invention.

The 2C~2E diagrams are spot diagrams of the first embodiment of the wide-angle lens according to the present invention.

FIG. 2F is a diagram of a Through Focus Modulation Transfer Function according to the first embodiment of the wide-angle lens of the present invention.

FIG. 3 is a schematic diagram of the lens configuration and optical path of the second embodiment of the wide-angle lens according to the present invention.

FIG. 4A is a field curvature diagram of the second embodiment of the wide-angle lens according to the present invention.

FIG. 4B is a distortion diagram of the second embodiment of the wide-angle lens according to the present invention.

Figures 4C~4E are light spot diagrams of the second embodiment of the wide-angle lens according to the present invention.

FIG. 4F is a graph of the defocus modulation transfer function according to the second embodiment of the wide-angle lens of the present invention.

FIG. 5 is a schematic diagram of the lens configuration and optical path of the third embodiment of the wide-angle lens according to the present invention.

FIG. 6A is a field curvature diagram of the third embodiment of the wide-angle lens according to the present invention.

FIG. 6B is a distortion diagram of the third embodiment of the wide-angle lens according to the present invention.

Figures 6C~6E are light spot diagrams of the third embodiment of the wide-angle lens according to the present invention.

FIG. 6F is a graph of the defocus modulation conversion function of the third embodiment of the wide-angle lens according to the present invention.

The invention provides a wide-angle lens, comprising: a first lens with negative refractive power, the first lens is a meniscus lens; a second lens with negative refractive power, the second lens is a meniscus lens; and a third lens with negative power Refractive power; a fourth lens has a refractive power, the fourth lens includes a concave surface facing an object side; a fifth lens has a positive refractive power; a sixth lens has Positive refractive power; a seventh lens has refractive power, the seventh lens includes a concave surface facing the object side; an eighth lens has positive refractive power; a ninth lens has negative refractive power; and a tenth lens has refractive power, and the tenth lens includes A concave surface faces an image side; where the first lens, second lens, third lens, fourth lens, fifth lens, sixth lens, seventh lens, eighth lens, ninth lens, and tenth lens mirror An optical axis is arranged in order from the object side to the image side; the wide-angle lens satisfies the following conditions: 11<TTL/f<14; where f is an effective focal length of a wide-angle lens, and TTL is an object side of the first lens to an imaging plane One pitch on the optical axis, the unit of the pitch is mm.

Please refer to the following Table 1, Table 2, Table 4, Table 5, Table 7 and Table 8, where Table 1, Table 4 and Table 7 are the lenses of the first to third embodiments of the wide-angle lens according to the present invention The related parameter table, Table 2, Table 5 and Table 8 are the related parameter table of the aspheric surface of the aspheric lens in Table 1, Table 4 and Table 7, respectively.

Figures 1, 3, and 5 are schematic diagrams of lens configurations and optical paths of the first, second, and third embodiments of the wide-angle lens of the present invention, wherein the first lenses L11, L21, and L31 are meniscus lenses with negative refractive power, made of glass The object side surfaces S11, S21, S31 are convex surfaces, the image side surfaces S12, S22, S32 are concave surfaces, and the object side surfaces S11, S21, S31 and the image side surfaces S12, S22, S32 are spherical surfaces.

The second lenses L12, L22, L32 are meniscus lenses with negative refractive power, made of glass material, the object side surfaces S13, S23, S33 are convex surfaces, the image side surfaces S14, S24, S34 are concave surfaces, and the object side surfaces S13, S23, S33 and the image side surfaces S14, S24, and S34 are all spherical surfaces.

The third lens L13, L23, L33 is a meniscus lens with negative refractive power, made of glass material, its object side S15, S25, S35 is concave, the image side S16, S26, S36 is convex, the object side S15, S25, S35 and the image side surfaces S16, S26, S36 are all spherical surfaces.

The fourth lens L14, L24, L34 is a meniscus lens with positive refractive power, made of glass material, its object side S16, S26, S36 is concave, the image side S17, S27, S37 is convex, and the object side S16, S26, S36 and the image side surfaces S17, S27, and S37 are all spherical surfaces.

The fifth lenses L15, L25, L35 are biconvex lenses with positive refractive power, made of glass material, the object side surfaces S18, S28, S38 are convex surfaces, the image side surfaces S19, S29, S39 are convex surfaces, and the object side surfaces S18, S28, S38 and The side surfaces S19, S29, and S39 are all spherical surfaces.

The sixth lenses L16, L26, L36 are biconvex lenses with positive refractive power, made of glass material, the object side surfaces S111, S211, S311 are convex surfaces, the image side surfaces S112, S212, S312 are convex surfaces, and the object side surfaces S111, S211, S311 and The image side surfaces S112, S212, and S312 are all spherical surfaces.

The seventh lenses L17, L27, L37 are meniscus lenses with positive refractive power, made of glass material, the object side surfaces S113, S213, S313 are concave surfaces, the image side surfaces S114, S214, S314 are convex surfaces, the object side surfaces S113, S213, S313 and the image side surfaces S114, S214, and S314 are spherical surfaces.

The eighth lenses L18, L28, L38 are biconvex lenses with positive refractive power, made of glass material, the object side surfaces S115, S215, S315 are convex surfaces, the image side surfaces S116, S216, S316 are convex surfaces, and the object side surfaces S115, S215, S315 and The side surfaces S116, S216, and S316 are all spherical surfaces.

The ninth lenses L19, L29, and L39 have negative refractive power and are made of glass material. The object side surfaces S116, S216, and S316 are concave surfaces, and the object side surfaces S116, S216, and S316 are spherical surfaces.

The tenth lens L110, L210, L310 is a meniscus lens with positive refractive power, made of glass material, the object side S118, S218, S318 is convex, like the side S119, S219, S319 is a concave surface, and object side surfaces S118, S218, S318 and image side surfaces S119, S219, S319 are all aspherical surfaces.

The third lenses L13, L23, L33 are cemented with the fourth lenses L14, L24, L34, respectively.

The eighth lenses L18, L28, L38 are cemented with the ninth lenses L19, L29, L39, respectively.

In addition, wide-angle lenses 1, 2, and 3 satisfy at least one of the following conditions:

11<TTL/f<14 (1)

0.7<TTL/θ<0.82 (2)

6<f ₅ /f<8.5 (3)

12.03<TTL/f<12.93 (4)

0.74<TTL/θ<0.79 (5)

6.31<f ₅ /f<7.98 (6)

Among them, f is the effective focal length of one of the wide-angle lenses 1, 2, 3 in the first to third embodiments, and f ₅ is one of the fifth lenses L15, L25, L35 in the first to third embodiments. Effective focal length, TTL is the first to third embodiments, the object sides S11, S21, S31 of the first lenses L11, L21, L31 are respectively onto the imaging planes IMA1, IMA2, IMA3 on the optical axes OA1, OA2, OA3 One pitch, the unit of this pitch is mm, and θ is the half field of view of the wide-angle lenses 1, 2, 3 in the first to third embodiments, and the unit of this half field of view is degrees. The wide-angle lens 1, 2, 3 can effectively increase the field of view, effectively improve the resolution, effectively resist the environmental temperature change, effectively correct the aberration, and effectively correct the chromatic aberration.

Meet the condition (1): 11<TTL/f<14, then the best lens miniaturization rule Pieces.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to FIG. 1, the wide-angle lens 1 includes a first lens L11, a second lens L12, a third lens L13, a fourth lens L14, a first lens L11, a second lens L12, a third lens L13, a The fifth lens L15, an aperture ST1, a sixth lens L16, a seventh lens L17, an eighth lens L18, a ninth lens L19, a tenth lens L110, a filter OF1 and a protective glass CG1. When imaging, the light from the object side is finally imaged on an imaging surface IMA1. According to paragraphs 1 to 14 of the [Embodiment], where:

The ninth lens L19 is a plano-concave lens, and its image side S117 is a plane;

The object side S120 and the image side S121 of the filter OF1 are both flat;

The object side S122 and the image side S123 of the protective glass CG1 are both flat;

Using the above lens, aperture ST1, and the design that satisfies at least one of the conditions (1) to (6), the wide-angle lens 1 can effectively increase the field of view, effectively improve the resolution, effectively resist environmental temperature changes, and effectively correct Aberration, effective correction of chromatic aberration.

Table 1 is a table of related parameters of each lens of the wide-angle lens 1 in FIG. 1.

The aspheric surface concave degree _{z of the} aspheric lens in Table 1 is obtained by the following formula:

z=ch ² /{1+[1-(k+1)c ² h ² ] ^1/2 }+Ah ⁴ +Bh ⁶ +Ch ⁸ +Dh ¹⁰ +Eh ¹² +Fh ¹⁴ +Gh ¹⁶

among them:

c: curvature;

h: the vertical distance from any point on the lens surface to the optical axis;

k: conic coefficient;

A~G: Aspheric coefficient.

Table 2 is the related parameter table of the aspherical surface of the aspherical lens in Table 1, where k is the conic constant and A~G are the aspherical coefficients.

Table 3 shows the relevant parameter values of the wide-angle lens 1 of the first embodiment and the calculated values of the corresponding conditions (1) to (6). From Table 3, it can be seen that the wide-angle lens 1 of the first embodiment can satisfy the conditions (1) to Requirements of condition (6).

In addition, the optical performance of the wide-angle lens 1 of the first embodiment can also meet the requirements.

As can be seen from FIG. 2A, the field angle of the wide-angle lens 1 of the first embodiment is between -0.02 mm and 0.06 mm. It can be seen from FIG. 2B that the distortion of the wide-angle lens 1 of the first embodiment is between -7% and 0%. As can be seen from Figures 2C~2E, the wide-angle lens 1 of the first embodiment has a root mean square radius of 0.861 μm when the image height is 0.000 mm, and the geometry of the light spot (Geometrical) The radius is 1.892μm, when the image height is 3.965mm, the root mean square radius of the light spot is 1.460μm, the geometric radius of the light spot is 4.518μm, when the image height is 7.930mm, the root mean square radius of the light spot It is 6.095μm, and the geometric radius of the light spot is 22.194μm. As can be seen from FIG. 2F, in the wide-angle lens 1 of the first embodiment, when the focus shift is between -0.05 mm and 0.05 mm, its modulation transfer function value is between 0.0 and 0.78.

It is obvious that the field curvature and distortion of the wide-angle lens 1 of the first embodiment can be effectively corrected, and the lens resolution and focal depth can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 3, which is a schematic diagram of a lens configuration and an optical path according to the second embodiment of the wide-angle lens of the present invention. The wide-angle lens 2 includes a first lens L21, a second lens L22, a third lens L23, a fourth lens L24, a fifth lens L25, a lens in order from an object side to an image side along an optical axis OA2 Aperture ST2, a sixth lens L26, a seventh lens L27, An eighth lens L28, a ninth lens L29, a tenth lens L210, a filter OF2 and a protective glass CG2. When imaging, the light from the object side is finally imaged on an imaging surface IMA2. According to paragraphs 1 to 14 of the [Embodiment], where:

The ninth lens L29 is a meniscus lens, and its image side S217 is convex, and both the object side S216 and the image side S217 are spherical surfaces;

The object side S220 and the image side S221 of the filter OF2 are both flat;

The object side S222 and the image side S223 of the protective glass CG2 are flat;

Using the above lens, aperture ST2, and the design that satisfies at least one of the conditions (1) to (6), the wide-angle lens 2 can effectively increase the field of view, effectively improve the resolution, effectively resist environmental temperature changes, and effectively correct Aberration, effective correction of chromatic aberration.

Table 4 is a table of related parameters of each lens of the wide-angle lens 2 in FIG. 3.

The aspherical surface concavity z of the aspherical lens in Table 4 is as defined in the first embodiment. Table 5 is the related parameter table of the aspheric surface of the aspheric lens in Table 4. The definition of the correlation coefficient is the same as that of the first embodiment, which will not be repeated here.

Table 6 shows the related parameter values of the wide-angle lens 2 of the second embodiment and the calculated values of the corresponding conditions (1) to (6). As can be seen from Table 6, the wide-angle lens 2 of the second embodiment can satisfy the conditions (1) to Requirements of condition (6).

In addition, the optical performance of the wide-angle lens 2 of the second embodiment can also meet requirements.

It can be seen from FIG. 4A that the field angle of the wide-angle lens 2 of the second embodiment is between -0.02 mm and 0.08 mm. As can be seen from FIG. 4B, the distortion of the wide-angle lens 2 of the second embodiment is between -7% and 0%. As can be seen from Figures 4C~4E, the wide-angle lens 2 of the second embodiment, when the image height is 0.000mm, the root mean square radius of the light spot is 0.747μm, and the geometry of the light spot is half The diameter is 1.592μm, when the image height is 3.965mm, the root mean square radius of the light spot is 1.414μm, the geometric radius of the light spot is 3.569μm, when the image height is 7.930mm, the root mean square radius of the light spot It is 3.428 μm, and the geometric radius of the light spot is 13.198 μm. As can be seen from FIG. 4F, in the wide-angle lens 2 of the second embodiment, when the focus shift is between -0.05 mm and 0.05 mm, its modulation transfer function value is between 0.0 and 0.78.

It is obvious that the field curvature and distortion of the wide-angle lens 2 of the second embodiment can be effectively corrected, and the lens resolution and focal depth can also meet the requirements, thereby obtaining better optical performance.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of a lens configuration and optical path of a third embodiment of a wide-angle lens according to the present invention. The wide-angle lens 3 includes a first lens L31, a second lens L32, a third lens L33, a fourth lens L34, a fifth lens L35, a lens in order from an object side to an image side along an optical axis OA3 Aperture ST3, a sixth lens L36, a seventh lens L37, an eighth lens L38, a ninth lens L39, a tenth lens L310, a filter OF3 and a protective glass CG3. When imaging, the light from the object side is finally imaged on an imaging surface IMA3. According to paragraphs 1 to 14 of the [Embodiment], where:

The ninth lens L39 is a plano-concave lens, and its image side S317 is a plane;

The object side S320 and the image side S321 of the filter OF3 are both flat;

Protective glass CG3 is flat on its object side S322 and image side S323;

Using the above lens, aperture ST3, and the design that meets at least one of the conditions (1) to (6), the wide-angle lens 3 can effectively increase the field of view, effectively improve the resolution, effectively resist environmental temperature changes, and effectively correct Aberration, effective correction of chromatic aberration.

Table 7 is a table of related parameters of each lens of the wide-angle lens 3 in FIG. 5.

The aspherical surface concavity z of the aspherical lens in Table 7 is as defined in the first embodiment. Table 8 is the related parameter table of the aspherical surface of the aspherical lens in Table 7. The definition of the correlation coefficient is the same as that of the first embodiment, which will not be repeated here.

Table 9 shows the relevant parameter values of the wide-angle lens 3 of the third embodiment and the calculated values of the corresponding conditions (1) to (6). As can be seen from Table 9, the wide-angle lens 3 of the third embodiment can satisfy the conditions (1) to Requirements of condition (6).

In addition, the optical performance of the wide-angle lens 3 of the third embodiment can also meet the requirements.

It can be seen from FIG. 6A that the field angle of the wide-angle lens 3 of the third embodiment is between -0.05 mm and 0.05 mm. As can be seen from FIG. 6B, the distortion of the wide-angle lens 3 of the third embodiment is between -6% and 0%. As can be seen from Figures 6C~6E, the wide-angle lens 3 of the third embodiment has an rms radius of the light spot of 1.144 μm when the image height is 0.000 mm, and a geometric radius of the light spot of 2.570 μm when the image height is At 3.965mm, the root mean square radius of the light spot is 1.396μm, the geometric radius of the light spot is 3.661μm, when the image height is 7.930mm, the root mean square radius of the light spot is 5.516μm, the geometric radius of the light spot It is 19.388μm. As can be seen from FIG. 6F, the wide-angle lens 3 of the third embodiment has a modulation transfer function value between 0.0 and 0.75 when the focus shift is between -0.05 mm and 0.05 mm.

It is obvious that the field curvature and distortion of the wide-angle lens 3 of the third embodiment can be effectively corrected, and the lens resolution and focal depth can also meet the requirements, thereby obtaining better optical performance.

Although the present invention has been disclosed as above in an embodiment, it is not intended to limit the present invention. Anyone who is familiar with this art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection of the present invention The scope shall be determined by the scope of the attached patent application.

1‧‧‧wide-angle lens

L11‧‧‧First lens

L12‧‧‧Second lens

L13‧‧‧third lens

L14‧‧‧Fourth lens

L15‧‧‧fifth lens

ST1‧‧‧Aperture

L16‧‧‧Sixth lens

L17‧‧‧Seventh lens

L18‧‧‧Eighth lens

L19‧‧‧Ninth lens

L110‧‧‧Tenth lens

OF1‧‧‧filter

CG1‧‧‧protective glass

IMA1‧‧‧Imaging surface

OA1‧‧‧Optical axis

S11‧‧‧Side of the first lens

S12‧‧‧The first lens image side

S13‧‧‧Second lens object side

S14‧‧‧Second lens image side

S15‧‧‧Side of third lens object

S16‧‧‧ Image side of third lens (object side of fourth lens)

S17‧‧‧Image side of fourth lens

S18‧‧‧Side of fifth lens

S19‧‧‧Side lens side

S110‧‧‧Aperture

S111‧‧‧Sixth lens object side

S112‧‧‧Sixth lens image side

S113‧‧‧Side of seventh lens

S114‧‧‧Seventh lens image side

S115‧‧‧Eighth lens side

S116‧‧‧Eighth lens image side (ninth lens object side)

S117‧‧‧Ninth lens image side

S118‧‧‧The tenth lens side

S119‧‧‧Tenth lens image side

S120‧‧‧ Filter side

S121‧‧‧ filter image side

S122‧‧‧Protection glass side

S123‧‧‧Protect the glass side

Claims (10)

A wide-angle lens, including: A first lens has negative refractive power, the first lens is a meniscus lens; A second lens having negative refractive power, the second lens is a meniscus lens; A third lens has negative refractive power; A fourth lens having refractive power, the fourth lens includes a concave surface facing an object side; A fifth lens has positive refractive power; A sixth lens with positive refractive power; A seventh lens having refractive power, the seventh lens includes a concave surface facing the object side; An eighth lens has positive refractive power; A ninth lens has negative refractive power; and A tenth lens has refractive power, and the tenth lens includes a concave surface facing an image side; Wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens, the ninth lens and the tenth lens Arrange in order along the optical axis from the object side to the image side; The wide-angle lens meets the following conditions: 11<TTL/f<14; Where, f is an effective focal length of the wide-angle lens, and TTL is a distance between the object side of the first lens and an imaging plane on the optical axis, and the unit of the distance is mm. The wide-angle lens as described in item 1 of the patent application scope, in which: The fourth lens has positive refractive power; The seventh lens has positive refractive power; and The tenth lens has positive refractive power. The wide-angle lens as described in item 2 of the patent application scope, in which: The fourth lens further includes a convex surface facing the image side; The seventh lens further includes a convex surface facing the image side; and The tenth lens further includes a convex surface facing the object side. The wide-angle lens as described in any of claims 1 to 3 of the patent application scope, in which: The first lens includes a convex surface facing the object side and a concave surface facing the image side; The second lens includes a convex surface facing the object side and a concave surface facing the image side; and The third lens includes a concave surface facing the object side and a convex surface facing the image side. The wide-angle lens as described in any of claims 1 to 3 of the patent application scope, in which: The fifth lens includes a convex surface facing the object side and another convex surface facing the image side; and The sixth lens includes a convex surface facing the object side and another convex surface facing the image side. The wide-angle lens as described in any of claims 1 to 3 of the patent application scope, in which: The eighth lens includes a convex surface facing the object side and another convex surface facing the image side; and The ninth lens includes a concave surface facing the object side. The wide-angle lens as claimed in any one of claims 1 to 3, wherein the ninth lens includes a convex surface or a flat surface facing the image side. The wide-angle lens as claimed in any one of claims 1 to 3, wherein the third lens is cemented with the fourth lens, and the eighth lens is cemented with the ninth lens. The wide-angle lens as described in any of claims 1 to 3 of the patent application scope, wherein the wide-angle lens satisfies at least one of the following conditions: 0.7<TTL/θ<0.82; 6<f ₅ /f<8.5; Where f is an effective focal length of the wide-angle lens, TTL is a distance between the object side of the first lens and an imaging plane on the optical axis, the unit of the distance is mm, and θ is a half field of view of the wide-angle lens, The unit of the half field of view is degrees, and f _{5 is} an effective focal length of one of the fifth lenses. The wide-angle lens as described in item 9 of the patent application scope, wherein the wide-angle lens satisfies at least one of the following conditions: 12.03<TTL/f<12.93; 0.74<TTL/θ<0.79; Where f is an effective focal length of the wide-angle lens, TTL is a distance between the object side of the first lens and an imaging plane on the optical axis, the unit of the distance is mm, and θ is a half field of view of the wide-angle lens, The unit of the half field of view is degrees.

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