TWI752639B - 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, and a sixth lens. The first lens is with negative refractive power and includes a convex surface facing an object side and a concave surface facing an image side. The second lens is with positive refractive power and includes a concave surface facing the object side and a convex surface facing the image side. The third lens is with positive refractive power and includes a convex surface facing the object side. The fourth lens is a biconvex lens with positive refractive power and includes a convex surface facing the object side and another convex surface facing the image side. The fifth lens is a biconcave lens with negative refractive power and includes a concave surface facing the object side and another concave surface facing the image side. The sixth lens is with refractive power and includes a convex surface facing the object side and a concave surface facing the image side. The first, second, third, fourth, fifth, and sixth lenses are arranged in order from the object side to the image side along an optical axis.

Description

Wide-angle lens (30)

The present invention relates to a wide-angle lens.

The development trend of today's wide-angle lenses, in addition to the continuous development of large apertures, requires high resolution and resistance to environmental temperature changes with different application requirements. A wide-angle lens with a new architecture can meet the needs of large aperture, high resolution and resistance to ambient 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 small aperture value, high resolution, and is resistant to changes in ambient temperature, but still has good optical performance.

The invention provides a wide-angle lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens is a meniscus lens with negative refractive power, and includes a convex surface facing an object side and a concave surface facing an image side. The second lens is a meniscus lens with positive refractive power, and includes a concave surface facing the object side and a convex surface facing the image side. The third lens has positive refractive power and includes a convex surface facing the object side. The fourth lens is a biconvex lens with positive refractive power, and includes a convex surface facing the object side and another convex surface facing the image side. The fifth lens is a biconcave lens with negative refractive power, and includes a concave surface facing the object side and another concave surface facing the image side. The sixth lens is a meniscus lens with refractive power, and includes a convex surface facing the object side and a concave surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side.

The present invention provides another wide-angle lens including a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens. The first lens has negative refractive power. The second lens has positive refractive power. The third lens has positive refractive power and includes a convex surface facing an object side. The fourth lens has positive refractive power. The fifth lens has negative refractive power and includes a concave surface facing an image side. The sixth lens has refractive power and includes a concave surface facing the image side. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side. The wide-angle lens satisfies the following conditions: 1.9<f ₃ /f<2.3; wherein, f ₃ is one of the effective focal lengths of the third lens, and f is one of the effective focal lengths of the wide-angle lens.

The sixth lens has positive refractive power.

The third lens may further include a concave surface facing the image side.

The third lens may further include another convex surface facing the image side.

Wherein the sixth lens has negative refractive power, and the third lens may further include another convex surface facing the image side.

The wide-angle lens of the present invention may further include a diaphragm disposed between the third lens and the fourth lens.

The wide-angle lens satisfies the following conditions: 1.9<f ₃ /f<2.3; wherein, f ₃ is one of the effective focal lengths of the third lens, and f is one of the effective focal lengths of the wide-angle lens.

The wide-angle lens satisfies the following conditions: CTE3>20×10 ^-6 /°C; wherein, CTE3 is a coefficient of thermal expansion (Coefficient of Thermal Expansion) of the third lens when the temperature is between -30°C and 70°C.

The wide-angle lens satisfies the following conditions: 2.1<TTL/IH<2.8; wherein, TTL is the distance between the object side of the first lens and an imaging surface on the optical axis, and IH is the maximum half-image height of the wide-angle lens on one of the imaging surfaces.

The wide-angle lens satisfies the following conditions: 0.3<Gap16/TTL<0.4; wherein, Gap16 is the sum of the air space between the image side of the first lens and the object side of the sixth lens on the optical axis, and TTL is the first lens. A distance on the optical axis between an object side surface and an imaging surface.

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

1, 2, 3: Wide-angle lens

L11, L21, L31: The first lens

L12, L22, L32: Second lens

L13, L23, L33: Third lens

L14, L24, L34: Fourth lens

L15, L25, L35: Fifth lens

L16, L26, L36: Sixth lens

ST1, ST2, ST3: Aperture

OA1, OA2, OA3: Optical axis

OF1, OF2, OF3: Filters

IMA1, IMA2, IMA3: Imaging plane

S11, S21, S31: the object side of the first lens

S12, S22, S32: the image side of the first lens

S13, S23, S33: the object side of the second lens

S14, S24, S34: second lens image side

S15, S25, S35: the object side of the third lens

S16, S26, S36: third lens image side

S17, S27, S37: Aperture surface

S18, S28, S38: the object side of the fourth lens

S19, S29, S39: image side of the fourth lens

S110, S210, S310: the object side of the fifth lens

S111, S211, S311: Image side of the fifth lens

S112, S212, S312: the object side of the sixth lens

S113, S213, S313: image side of sixth lens

S114, S214, S314: side of filter object

S115, S215, S315: Filter image side

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

FIG. 2A is a longitudinal aberration (Longitudinal Aberration) diagram of the first embodiment of the wide-angle lens according to the present invention.

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

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

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

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

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

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

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

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

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

FIG. 6C is a distortion diagram 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, and includes a convex surface facing an object side and a concave surface facing an image side; a second lens with positive refractive power, The second lens is a meniscus lens, and includes a concave surface facing the object side and a convex surface facing the image side; a third lens has positive refractive power, the third lens includes a convex surface facing the object side; a fourth lens has positive refractive power , the fourth lens is a biconvex lens, and includes a convex surface facing the object side and another convex surface facing the image side; a fifth lens has negative refractive power, the fifth lens is a biconcave lens, and includes a concave surface facing the object side and another The concave surface faces the image side; and a sixth lens has refractive power, the sixth lens is a meniscus lens, and includes a convex surface facing the object side and a concave surface facing the image side; wherein the first lens, the second lens, the third lens, The fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side.

Please refer to Table 1, Table 2, Table 4, Table 5, Table 7 and Table 8 below, where Table 1, Table 4 and Table 7 are the lenses of the first embodiment to the third embodiment of the wide-angle lens according to the present invention, respectively. Table 2, Table 5 and Table 8 are the relevant parameter tables of the aspheric surfaces of the aspheric lenses in Table 1, Table 4 and Table 7, respectively.

Figures 1, 3, and 5 are schematic diagrams of the lens configuration of the first, second, and third embodiments of the wide-angle lens of the present invention, respectively, wherein the first lenses L11, L21, L31 are meniscus lenses with negative refractive power, and the object sides S11, S21, S31 are convex surfaces, image side surfaces S12, S22, S32 are concave surfaces, and object side surfaces S11, S21, S31 and image side surfaces S12, S22, S32 are all aspheric surfaces.

The second lenses L12, L22, and L32 are meniscus lenses with positive refractive power. The object sides S13, S23, S33 are concave, the image sides S14, S24, S34 are convex, and the object sides S13, S23, S33 and the image sides S14, S24, S34 are all aspheric surfaces.

The third lenses L13, L23, L33 have positive refractive power, the object sides S15, S25, S35 are convex, and the object sides S15, S25, S35 and the image sides S16, S26, S36 are all aspheric surfaces.

The fourth lens L14, L24, and L34 are biconvex lenses with positive refractive power, the object sides S18, S28, S38 are convex, the image sides S19, S29, S39 are convex, the object sides S18, S28, S38 and the image sides S19, S29, S39 are all aspherical surfaces.

The fifth lens L15, L25, and L35 are biconcave lenses with negative refractive power. The object sides S110, S210, and S310 are concave, the image sides S111, S211, and S311 are concave, and the object sides S110, S210, and S310 are concave. S311 are all aspherical surfaces.

The sixth lens L16, L26, and L36 are meniscus lenses, the object sides S112, S212, S312 are convex, the image sides S113, S213, S313 are concave, the object sides S112, S212, S312 and the image sides S113, S213, S313 All are aspherical surfaces.

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

1.9<f ₃ /f<2.3 (1)

CTE3>20×10 ^-6 /℃ (2)

2.1<TTL/IH<2.8 (3)

0.3<Gap16/TTL<0.4 (4)

Wherein, f ₃ is one of the effective focal lengths of the third lenses L13, L23, L33 in the first to third embodiments, and f is one of the wide-angle lenses 1, 2, and 3 in the first to third embodiments Effective focal length, CTE3 is the thermal expansion coefficient of the third lenses L13, L23, L33 at temperatures between -30°C and 70°C in the first to third embodiments, TTL is the first to third embodiments In the example, the side surfaces S11, S21, and S31 of the first lenses L11, L21, and L31 are respectively a distance from an imaging plane IMA1, IMA2, and IMA3 on the optical axes OA1, OA2, and OA3. In the third embodiment, the wide-angle lenses 1, 2, and 3 are respectively at the maximum half-image height of one of the imaging planes IMA1, IMA2, and IMA3, and Gap16 is one of the image sides S12, S22, and S32 of the first lenses L11, L21, and L31 to the sixth One of the object sides S112, S212, S312 of the lenses L16, L26, and L36 is the sum of an air space on the optical axes OA1, OA2, and OA3. The wide-angle lenses 1, 2, and 3 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, effectively resist environmental temperature changes, effectively correct aberrations, and effectively correct chromatic aberration.

When the condition (1) is satisfied: 1.9<f ₃ /f<2.3, it can effectively resist environmental temperature changes and maintain high-resolution characteristics.

When the condition (2) is satisfied: CTE3>20×10 ^-6 /°C, it can effectively resist environmental temperature changes and maintain high-resolution characteristics.

When the condition (3) is satisfied: 2.1<TTL/IH<2.8, the total length of the wide-angle lens can be effectively shortened.

When the condition (4) is satisfied: 0.3<Gap16/TTL<0.4, the total length of the wide-angle lens can be effectively shortened.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Referring to FIG. 1, the wide-angle lens 1 includes a first lens L11, a second lens L12, a third lens L13, an aperture ST1, a fourth lens L11, a second lens L12, a third lens L13, an aperture ST1, and a fourth lens in sequence from an object side to an image side along an optical axis OA1. Lens L14, a fifth lens L15, a sixth lens L16 and a filter OF1. During imaging, the light from the object side is finally imaged on an imaging plane IMA1. According to the first to eighth paragraphs of [Embodiment], wherein:

The third lens L13 is a meniscus lens, and its image side surface S16 is a concave surface;

The sixth lens L16 has positive refractive power;

The object side S114 and the image side S115 of the filter OF1 are both planes;

Utilizing the above-mentioned lens, aperture ST1 and the design that satisfies at least one of the conditions (1) to (4), the wide-angle lens 1 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, and effectively resist the Ambient temperature change, effective correction of aberration, effective correction of chromatic aberration.

Table 1 is a table of relevant parameters of each lens of the wide-angle lens 1 in Fig. 1 .

The aspheric surface concavity 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

in:

c: curvature;

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

k: cone coefficient;

A~F: Aspheric coefficients.

Table 2 is a table of relevant parameters of the aspheric surface of the aspheric lens in Table 1, where k is the Conic Constant, and A~F are the aspheric coefficients.

Table 3 shows the relevant parameter values of the wide-angle lens 1 of the first embodiment and their corresponding values For the calculated values of the conditions (1) to (4), it can be seen from Table 3 that the wide-angle lens 1 of the first embodiment can all meet the requirements of the conditions (1) to (4).

In addition, the optical performance of the wide-angle lens 1 of the first embodiment can also meet the requirements. It can be seen from FIG. 2A that the longitudinal aberration of the wide-angle lens 1 of the first embodiment is between -0.025mm and 0.035mm. It can be seen from FIG. 2B that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.04mm and 0.06mm. It can be seen from FIG. 2C that the distortion of the wide-angle lens 1 of the first embodiment is between -50% and 0%.

It is obvious that the longitudinal aberration, field curvature and distortion of the wide-angle lens 1 of the first embodiment can be effectively corrected, thereby obtaining better optical performance.

Please refer to FIG. 3. FIG. 3 is a schematic diagram of the lens configuration of the second embodiment of the wide-angle lens according to the present invention. The wide-angle lens 2 includes a first lens L21 , a second lens L22 , a third lens L23 , an aperture ST2 , a fourth lens L24 , a fifth lens L24 and a fifth lens in sequence along an optical axis OA2 from an object side to an image side. Lens L25, a sixth lens L26 and a filter OF2. During imaging, the light from the object side is finally imaged on an imaging plane IMA2. According to the first to eighth paragraphs of [Embodiment], wherein:

The third lens L23 is a biconvex lens, and its image side surface S26 is a convex surface;

The sixth lens L26 has negative refractive power;

The object side S214 and the image side S215 of the filter OF2 are both planes;

Using the above-mentioned lens, aperture ST2 and the design that satisfies at least one of the conditions (1) to (4), the wide-angle lens 2 can effectively shorten the total length of the lens, effectively reduce the light circle value, effective resolution enhancement, effective resistance to ambient temperature changes, effective correction of aberration, and effective correction of chromatic aberration.

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

The definition of the aspherical surface concavity z of the aspherical lens in Table 4 is the same as the definition of the aspherical surface concavity z of the aspherical lens in Table 1 in the first embodiment, and will not be repeated here.

Table 5 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 4. Among them, k is the cone coefficient (Conic Constant), and A~F is the aspheric coefficient.

Table 6 shows the relevant parameter values of the wide-angle lens 2 of the second embodiment and the calculated values of the corresponding conditions (1) to (4). It can be seen from Table 6 that the wide-angle lens 2 of the second embodiment can meet the conditions (1) to the requirements of condition (4).

In addition, the optical performance of the wide-angle lens 2 of the second embodiment can also meet the requirements. It can be seen from FIG. 4A that the longitudinal aberration of the wide-angle lens 2 of the second embodiment is between -0.06mm and 0.12mm. It can be seen from FIG. 4B that the field curvature of the wide-angle lens 2 of the second embodiment is between -0.6 mm and 0.1 mm. It can be seen from FIG. 4C that the distortion of the wide-angle lens 2 of the second embodiment is between -60% and 0%.

Longitudinal aberration, field curvature, and distortion of the wide-angle lens 2 of the second embodiment can be effectively corrected to obtain better optical performance.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of a lens configuration of a third embodiment of the 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, an aperture ST3, a fourth lens L34, a fifth lens L34, a fifth lens Lens L35, a sixth lens L36 and a filter OF3. During imaging, the light from the object side is finally imaged on an imaging plane IMA3. According to the first to eighth paragraphs of [Embodiment], wherein:

The third lens L33 is a biconvex lens, and its image side surface S36 is a convex surface;

The sixth lens L36 has positive refractive power;

The object side S314 and the image side S315 of the filter OF3 are both planes;

Using the above-mentioned lens, aperture ST3 and the design that satisfies at least one of the conditions (1) to (4), the wide-angle lens 3 can effectively shorten the total length of the lens, effectively reduce the aperture value, effectively improve the resolution, and effectively resist the Ambient temperature change, effective correction of aberration, effective correction of chromatic aberration.

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

The definition of the aspherical surface concavity z of the aspherical lens in Table 7 is the same as the definition of the aspherical surface concavity z of the aspherical lens in Table 1 in the first embodiment, and will not be repeated here.

Table 8 is a table of relevant parameters of the aspheric surface of the aspheric lens in Table 7, where k is the Conic Constant, and A~F are the aspheric coefficients.

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 (4). It can be seen from Table 9 that the wide-angle lens 3 of the third embodiment can all satisfy the conditions (1) to (4). the requirements of condition (4).

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 longitudinal aberration of the wide-angle lens 3 of the third embodiment is between -0.035mm and 0.015mm. It can be seen from FIG. 6B that the field curvature of the wide-angle lens 3 of the third embodiment is between -0.1 mm and 0.25 mm. It can be seen from FIG. 6C that the distortion of the wide-angle lens 3 of the third embodiment is between -60% and 0%.

It is obvious that the longitudinal aberration, field curvature, and distortion of the wide-angle lens 3 of the third embodiment can be effectively corrected, thereby obtaining better optical performance.

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

1: Wide-angle lens

L11: The first lens

L12: Second lens

L13: Third lens

L14: Fourth lens

L15: Fifth lens

L16: Sixth lens

ST1: Aperture

OA1: Optical axis

OF1: filter

IMA1: Imaging plane

S11: Object side of the first lens

S12: The first lens image side

S13: Object side of the second lens

S14: The second lens is like the side

S15: Object side of the third lens

S16: The third lens is like the side

S17: Aperture Surface

S18: Fourth lens object side

S19: Fourth lens like side

S110: Object side of fifth lens

S111: Fifth lens image side

S112: Object side of sixth lens

S113: The sixth lens image side

S114: Side of filter object

S115: Filter like side

Claims (13)

A wide-angle lens, comprising: a first lens having negative refractive power, the first lens being a meniscus lens and comprising a convex surface facing an object side and a concave surface facing an image side; a second lens having positive refractive power, the second lens It is a meniscus lens and includes a concave surface facing the object side and a convex surface facing the image side; a third lens has positive refractive power, the third lens includes a convex surface facing the object side; a fourth lens has positive refractive power, the The fourth lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side; a fifth lens has negative refractive power, the fifth lens is a biconcave lens and includes a concave surface facing the object side and another concave surface facing the image side; and a sixth lens having refractive power, the sixth lens is a meniscus lens and includes a convex surface facing the object side and a concave surface facing the image side; wherein the first lens, the second lens, the The third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side. A wide-angle lens, comprising: a first lens with negative refractive power; a second lens with positive refractive power; a third lens with positive refractive power, the third lens comprising a convex surface facing an object side and a concave surface facing an image side; a first lens Four lenses have positive refractive power; a fifth lens has negative refractive power, the fifth lens includes a concave surface facing the image side; and a sixth lens has refractive power, the sixth lens includes a concave surface facing the image side; wherein the first lens The lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side; wherein the wide-angle lens satisfies the following conditions: 1.9<f ₃ /f<2.3; wherein, f _{3 is} an effective focal length of the third lens, and f is an effective focal length of the wide-angle lens. A wide-angle lens, comprising: a first lens with negative refractive power; a second lens with positive refractive power; a third lens with positive refractive power, the third lens comprising a convex surface facing an object side; a fourth lens with positive refractive power; The fifth lens has negative refractive power, and the fifth lens includes a concave surface facing an image side; and a sixth lens has negative refractive power, and the sixth lens includes a concave surface facing the image side; wherein the first lens, the second lens , the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side; wherein the wide-angle lens satisfies the following conditions: 1.9<f ₃ /f <2.3; wherein, f _{3 is} an effective focal length of the third lens, and f is an effective focal length of the wide-angle lens. A wide-angle lens, comprising: a first lens with negative refractive power; a second lens with positive refractive power; a third lens with positive refractive power, the third lens comprising a convex surface facing an object side; a fourth lens with positive refractive power; The fifth lens has negative refractive power, and the fifth lens includes a concave surface facing an image side; and a sixth lens has refractive power, and the sixth lens includes a concave surface facing the image side; wherein the first lens, the second lens, The third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side; wherein the wide-angle lens satisfies the following conditions: CTE3>20×10 ^-6 /°C; wherein, CTE3 is a thermal expansion coefficient of the third lens when the temperature is between -30°C and 70°C. A wide-angle lens, comprising: a first lens with negative refractive power; a second lens with positive refractive power; a third lens with positive refractive power, the third lens comprising a convex surface facing an object side; a fourth lens with positive refractive power; The fifth lens has negative refractive power, and the fifth lens includes a concave surface facing an image side; and a sixth lens has negative refractive power, and the sixth lens includes a concave surface facing the image side; wherein the first lens, the second lens , the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side; wherein the wide-angle lens satisfies the following conditions: 2.1<TTL/IH< 2.8; wherein, TTL is a distance between an object side of the first lens and an imaging plane on the optical axis, and IH is a maximum half-image height of the wide-angle lens on the imaging plane. A wide-angle lens comprising: A first lens has a negative refractive power; a second lens has a positive refractive power; a third lens has a positive refractive power, the third lens includes a convex surface facing an object side; a fourth lens has a positive refractive power; a fifth lens has a negative refractive power refractive power, the fifth lens includes a concave surface facing an image side; and a sixth lens has refractive power, the sixth lens includes a concave surface facing the image side; wherein the first lens, the second lens, the third lens, The fourth lens, the fifth lens and the sixth lens are sequentially arranged along an optical axis from the object side to the image side; wherein the wide-angle lens satisfies the following conditions: 0.3<Gap16/TTL<0.4; wherein, TTL is A distance on the optical axis from an object side of the first lens to an imaging surface, Gap16 is the total air gap on the optical axis from an image side of the first lens to an object side of the sixth lens on the optical axis combine. The wide-angle lens described in item 1 or item 2 or item 4 or item 6 of the claimed scope, wherein the sixth lens element has negative refractive power. The wide-angle lens described in item 1 or item 3 or item 4 or item 5 or item 6 of the claimed scope, wherein the third lens further includes a concave surface facing the image side. The wide-angle lens described in item 1 or item 3 or item 4 or item 5 or item 6 of the claimed scope, wherein the third lens further includes another convex surface facing the image side. The wide-angle lens described in item 1 or item 3 or item 4 or item 6 of the scope of the application, wherein the third lens further includes another convex surface facing the image side, and the wide-angle lens satisfies the following conditions: 2.1<TTL/IH <2.8; Wherein, TTL is a distance between an object side of the first lens and an imaging surface on the optical axis, and IH is a maximum half-image height of the wide-angle lens on the imaging surface. The wide-angle lens described in item 1 or item 4 or item 5 or item 6 of the scope of the patent application further comprises an aperture set between the third lens and the fourth lens, wherein the wide-angle lens satisfies the following conditions: 1.9<f ₃ /f<2.3; wherein, f _{3 is} an effective focal length of the third lens, and f is an effective focal length of the wide-angle lens. The wide-angle lens described in item 1 or item 2 or item 3 or item 5 or item 6 of the scope of the application, wherein the wide-angle lens satisfies the following conditions: CTE3>20×10 ^-6 /℃; wherein, CTE3 is the The third lens has a thermal expansion coefficient when the temperature is between -30°C and 70°C. The wide-angle lens described in item 1 or item 2 or item 3 or item 4 or item 5 of the scope of application, wherein the wide-angle lens satisfies the following conditions: 0.3<Gap16/TTL<0.4; wherein, TTL is the first A distance on the optical axis from an object side of the lens to an imaging surface, Gap16 is the sum of an air gap on the optical axis from an image side of the first lens to an object side of the sixth lens.

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