TWI709783B - 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, and a fifth lens, all of which are arranged in order from an object side to an image side along an optical axis. The first lens is a meniscus lens with negative refractive power. The second lens is a meniscus lens with positive refractive power. The third lens is with positive refractive power. The fourth lens is with positive refractive power. The fifth lens is with negative refractive power. The wide-angle lens assembly satisfies: 3<TTL/BFL<3.5; wherein TTL is an interval from an object side surface of the first lens to an image plane along the optical axis and BFL is an interval from an image side surface of the fifth lens to the image plane along the optical axis.

Description

Wide-angle lens (28)

The invention relates to a wide-angle lens.

The development trend of today's wide-angle lens, in addition to the continuous development towards miniaturization and 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. , A wide-angle lens with another new architecture is needed to meet the needs of miniaturization, large field of view, high resolution and resistance to environmental temperature changes.

In view of this, the main purpose of the present invention is to provide a wide-angle lens, which has a shorter overall lens length, larger field of view, higher resolution, 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, and a fifth lens. The first lens is a meniscus lens with negative refractive power. The second lens is a meniscus lens with positive refractive power. The third lens has positive refractive power. The fourth lens has positive refractive power. The fifth lens has negative refractive power. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are arranged in order from an object side to an image side along an optical axis. The wide-angle lens meets the following conditions: 3<TTL/BFL<3.5; among them, TTL is the first lens from one side to 10% A distance between the image plane and the optical axis, and the BFL is a distance between the image side surface of the fifth lens and the imaging plane on the optical axis.

The first lens includes a convex surface toward the object side and a concave surface toward the image side. The second lens includes a concave surface toward the object side and a convex surface toward the image side. The third lens includes a convex surface toward the object side and another convex surface toward the image side. The fourth lens includes a convex surface facing the object side and another convex surface facing the image side. The fifth lens includes a concave surface facing the object side and another concave surface facing the image side.

The wide-angle lens satisfies the following conditions: -3<f ₂ /f ₁ <-1; where f ₁ is an effective focal length of the first lens, and f ₂ is an effective focal length of the second lens.

The wide-angle lens satisfies the following conditions: 1<f ₂ /f ₄ <3; where f ₂ is an effective focal length of the second lens, and f ₄ is an effective focal length of the fourth lens.

The wide-angle lens satisfies the following conditions: 0.5<f ₁ /f ₅ <1.5; where f ₁ is an effective focal length of the first lens, and f ₅ is an effective focal length of the fifth lens.

The wide-angle lens satisfies the following conditions: 3<R ₁₁ /R ₁₂ <5;-11<R ₃₁ /R ₃₂ <-3; where R ₁₁ is the radius of curvature of one of the object sides of the first lens, and R ₁₂ is the first A curvature radius of an image side surface of the lens, R ₃₁ is a curvature radius of an object side surface of the third lens, and R ₃₂ is a curvature radius of an image side surface of the third lens.

The wide-angle lens satisfies the following conditions: 20<TTL/T ₁ <21.5; where T ₁ is a thickness of the first lens on the optical axis.

The wide-angle lens satisfies the following conditions: 8<TTL/T ₃ <10; among them, T ₃ is a thickness of the third lens on the optical axis.

The wide-angle lens satisfies the following conditions: 10<TTL/T ₄ <13; among them, T ₄ is a thickness of the fourth lens on the optical axis.

The wide-angle lens satisfies the following conditions: 72.08<TTL/AT ₃₄ <114.31;106.3<TTL/AT ₄₅ <115.7; Among them, AT ₃₄ is the air gap between the third lens and the fourth lens on the optical axis, and AT ₄₅ is the fourth An air gap between the lens and the fifth lens on the optical axis.

In order to make the above-mentioned objects, features, and advantages of the present invention more obvious and understandable, the following specifically describes preferred embodiments in conjunction with the accompanying drawings.

1, 2, 3: wide-angle lens

L11, L21, L31: the first lens

L12, L22, L32: second lens

ST1, ST2, ST3: aperture

L13, L23, L33: third lens

L14, L24, L34: fourth lens

L15, L25, L35: fifth lens

OF1, OF2, OF3: filter

CG1, CG2, CG3: protective glass

IMA1, IMA2, IMA3: imaging surface

OA1, OA2, OA3: Optical axis

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

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

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

S14, S24, S34: the side of the second lens image

S15, S25, S35: aperture surface

S16, S26, S36: third lens object side

S17, S27, S37: third lens image side

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

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

S110, S210, S310: fifth lens object side

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

S112, S212, S312: side of the filter object

S113, S213, S313: Filter image side

S114, S214, S314: Protect the side of the glass object

S115, S215, S315: Protect the side of the glass image

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

Figure 2A is a Longitudinal Aberration diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2B is a Field Curvature diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2C is a distortion (Distortion) diagram of the first embodiment of the wide-angle lens according to the present invention.

Figure 2D is a diagram of Through Focus Modulation Transfer Function (Through Focus Modulation Transfer Function) of the first embodiment of the wide-angle lens according to the present invention when the temperature is equal to -10°C, 20°C, and 70°C.

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 longitudinal aberration diagram of the second embodiment of the wide-angle lens according to the present invention.

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

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

FIG. 4D is a graph of the defocus modulation transfer function diagram of the second embodiment of the wide-angle lens according to the present invention when the temperature is equal to -10°C, 20°C, and 70°C, respectively.

FIG. 5 is a schematic diagram of the lens arrangement and optical path of the 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.

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

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

Fig. 6D is a graph of the defocus modulation transfer function diagram of the third embodiment of the wide-angle lens according to the present invention when the temperature is equal to -10°C, 20°C, and 70°C, respectively.

The present invention provides a wide-angle lens, including: a first lens with negative refractive power, the first lens is a meniscus lens; a second lens with positive refractive power, the second lens is a meniscus lens; a third lens with positive Refractive power; a fourth lens has positive refractive power; and a fifth lens has negative refractive power; wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are along an optical axis from one object side to one The image sides are arranged in order; the wide-angle lens meets the following conditions: 3<TTL/BFL<3.5; among them, TTL is the distance between one object side of the first lens and an imaging surface on the optical axis, and BFL is one of the fifth lenses A distance from the image side to the image surface on the optical axis.

Please refer to Table 1, Table 2, Table 4, Table 5, Table 7 and Table 8 below. 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. The relevant parameter table, Table 2, Table 5 and Table 8 are the relevant 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 the lens configuration and optical path of the first, second, and third embodiments of the wide-angle lens of the present invention. The first lenses L11, L21, L31 are meniscus lenses with negative refractive power and are 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, and L32 are meniscus lenses with positive refractive power and are made of plastic material. The object side surfaces S13, S23, S33 are concave surfaces, the image side surfaces S14, S24, and S34 are convex surfaces, and the object side surfaces S13, S23, S33 and the image side surface S14, S24, S34 are all aspherical surfaces.

The third lens L13, L23, L33 is a double convex lens with positive refractive power, made of glass material, its object side surface S16, S26, S36 is convex surface, the image side surface S17, S27, S37 is convex surface, the object side surface S16, S26, S36 and The image sides S17, S27, and S37 are all spherical surfaces.

The fourth lens L14, L24, L34 is a double convex lens with positive refractive power, made of plastic material, its object side S18, S28, S38 are convex, the image side S19, S29, S39 are convex, the object side S18, S28, S38 and The image sides S19, S29, and S39 are all aspherical surfaces.

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

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

3<TTL/BFL<3.5 (1)

-3<f ₂ /f ₁ <-1 (2)

1<f ₂ /f ₄ <3 (3)

0.5<f ₁ /f ₅ <1.5 (4)

3<R ₁₁ /R ₁₂ <5 (5)

-11<R ₃₁ /R ₃₂ <-3 (6)

20<TTL/T ₁ <21.5 (7)

8<TTL/T ₃ <10 (8)

10<TTL/T ₄ <13 (9)

72.08<TTL/AT ₃₄ <114.31 (10)

106.3<TTL/AT ₄₅ <115.7 (11)

Among them, TTL is in the first embodiment to the third embodiment, the object sides S11, S21, S31 of the first lenses L11, L21, L31 are respectively to the imaging planes IMA1, IMA2, IMA3 on the optical axis OA1, OA2, OA3 In the first embodiment to the third embodiment, the image side surface S111, S211, S311 of the fifth lens L15, L25, L35 are respectively to the imaging surface IMA1, IMA2, IMA3 on the optical axis OA1, OA2, OA3. A pitch, f ₁ is the effective focal length of the first lens L11, L21, L31 in the first embodiment to the third embodiment, f ₂ is the second lens L12, One of the effective focal lengths of L22 and L32, f ₄ is the effective focal length of one of the fourth lenses L14, L24, L34 in the first embodiment to the third embodiment, and f ₅ is the first embodiment to the third embodiment. One of the effective focal lengths of the five lenses L15, L25, L35, R ₁₁ is the radius of curvature of one of the object sides S11, S21, S31 of the first lens L11, L21, L31 in the first embodiment to the third embodiment, R ₁₂ is In the first embodiment to the third embodiment, the curvature radius of one of the image sides S12, S22, S32 of the first lens L11, L21, L31, R ₃₁ is the first embodiment to the third embodiment, the third lens L13 , L23, L33 is a radius of curvature of the object side surface S16, S26, S36, R ₃₂ is one of the curvatures of the image side surface S17, S27, S37 of the third lens L13, L23, L33 in the first to third embodiments Radius, T ₁ is the thickness of the first lens L11, L21, L31 on the optical axis OA1, OA2, OA3 in the first embodiment to the third embodiment, and T ₃ is the thickness in the first embodiment to the third embodiment , a third lens L13, L23, L33 on the optical axis OA1, OA2, OA3 one of the thickness, T ₄ is the embodiment to the third embodiment, the fourth lens L14, L24, L34 of the first embodiment to the optical axis OA1, OA2 , A thickness on OA3, AT ₃₄ is one of the third lens L13, L23, L33 to the fourth lens L14, L24, L34 on the optical axis OA1, OA2, OA3 in the first to third embodiments The air distance, AT ₄₅ is the air distance between the fourth lens L14, L24, L34 and the fifth lens L15, L25, L35 on the optical axis OA1, OA2, OA3 in the first embodiment to the third embodiment. The wide-angle lenses 1, 2, and 3 can effectively shorten the total length of the lens, effectively increase the field of view, effectively increase the resolution, effectively resist environmental temperature changes, and effectively correct aberrations.

The first embodiment of the wide-angle lens of the present invention will now be described in detail. Please refer to Figure 1, the wide-angle lens 1 includes a first lens L11, a second lens L12, an aperture ST1, a third lens L13, and a fourth lens in order from an object side to an image side along an optical axis OA1. Lens L14, a fifth lens L15, 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 [Implementation Mode] paragraphs 1 to 7, in which:

The object side S112 and the image side S113 of the filter OF1 are both flat surfaces;

The object side S114 and the image side S115 of the protective glass CG1 are both flat surfaces;

Utilizing the above-mentioned lens, aperture ST1, and a design that meets at least one of conditions (1) to (11), the wide-angle lens 1 can effectively shorten the total length of the lens, effectively increase the field of view, effectively increase the resolution, and effectively The environmental temperature changes, effectively correcting aberrations.

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

among them:

c: curvature;

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

k: conic coefficient;

A~E: Aspheric coefficient.

Table 2 is the related parameter table of the aspheric surface of the aspheric lens in Table 1, where k is the Conic Constant and A~E are the aspheric 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 (11). From Table 3, it can be seen that the wide-angle lens 1 of the first embodiment can all satisfy the conditions (1) to The requirement of condition (11).

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 -0.02 mm and 0.02 mm.

It can be seen from Fig. 2B that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.02mm and 0.08mm.

It can be seen from FIG. 2C that the distortion of the wide-angle lens 1 of the first embodiment is between -1% and 1%.

It can be seen from Fig. 2D that the wide-angle lens 1 of the first embodiment, when the temperature is equal to -10°C, 20°C, and 70°C, when the focus shift is between -0.03mm and 0.03mm, its modulation conversion The function value is between 0.0 and 0.83.

It is obvious that the longitudinal aberration, curvature of field, 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 the lens configuration and optical path 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, an aperture ST2, a third lens L23, a fourth lens L24, and a fifth lens in order from an object side to an image side along an optical axis OA2. Lens L25, 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 [Implementation Mode] paragraphs 1 to 7, in which:

The object side S212 and the image side S213 of the filter OF2 are both flat surfaces;

The protective glass CG2, the object side S214 and the image side S215 are both flat;

Using the above-mentioned lens, aperture ST2 and a design that meets at least one of the conditions (1) to (11), the wide-angle lens 2 can effectively shorten the total length of the lens, effectively increase the field of view, effectively increase the resolution, and effectively The environmental temperature changes, effectively correcting aberrations.

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

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

Table 5 is a table of related parameters of the aspheric surface of the aspheric lens in Table 4, where k is the Conic Constant and A~E are the aspheric coefficients.

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 (11). From Table 6, it can be seen that the wide-angle lens 2 of the second embodiment can all satisfy the conditions (1) to The requirement of condition (11).

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 wide-angle lens 2 of the second embodiment has a longitudinal aberration between -0.02 mm and 0.03 mm.

It can be seen from FIG. 4B that the field curvature of the wide-angle lens 2 of the second embodiment is between -0.08mm and 0.06mm.

It can be seen from FIG. 4C that the distortion of the wide-angle lens 2 of the second embodiment is between 0% and 1%.

It can be seen from Fig. 4D that the wide-angle lens 2 of the second embodiment, when the temperature is equal to -10°C, 20°C, and 70°C, when the focus shift is between -0.03mm and 0.03mm, its modulation conversion The function value is between 0.0 and 0.82.

It is obvious that the longitudinal aberration, curvature of field, 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, which 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. The wide-angle lens 3 includes a first lens L31, a second lens L32, an aperture ST3, a third lens L33, a fourth lens L34, and a fifth lens in order from an object side to an image side along an optical axis OA3. Lens L35, 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 [Implementation Mode] paragraphs 1 to 7, in which:

The object side S312 and the image side S313 of the filter OF3 are both flat surfaces;

The protective glass CG3, the object side S314 and the image side S315 are both flat;

Using the above-mentioned lens, aperture ST3 and a design that meets at least one of the conditions (1) to (11), the wide-angle lens 3 can effectively shorten the total length of the lens and effectively increase Field of view, effective increase in resolution, effective resistance to environmental temperature changes, effective correction of aberrations.

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

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

Table 8 is a table of related parameters of the aspheric surface of the aspheric lens in Table 7, where k is the conic constant and A~E 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 (11). From Table 9, it can be seen that the wide-angle lens 3 of the third embodiment can all satisfy the conditions (1) to The requirement of condition (11).

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 wide-angle lens 3 of the third embodiment has a longitudinal aberration between -0.02 mm and 0.02 mm.

It can be seen from FIG. 6B that the field curvature of the wide-angle lens 3 of the third embodiment is between -0.04mm and 0.08mm.

It can be seen from FIG. 6C that the distortion of the wide-angle lens 3 of the third embodiment is between 0% and 5.1%.

It can be seen from Fig. 6D that the wide-angle lens 3 of the third embodiment, when the temperature is equal to -10°C, 20°C, and 70°C, when the focus shift is between -0.03mm and 0.03mm, its modulation conversion The function value is between 0.0 and 0.82.

It is obvious that the longitudinal aberration, curvature of field, 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 in the above embodiments, it is not intended to limit the The invention, anyone familiar with the art, can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of protection of the invention shall be subject to the scope of the appended patent application.

1‧‧‧Wide-angle lens

L11‧‧‧First lens

L12‧‧‧Second lens

ST1‧‧‧Aperture

L13‧‧‧Third lens

L14‧‧‧Fourth lens

L15‧‧‧Fifth lens

OF1‧‧‧Filter

CG1‧‧‧Protection glass

IMA1‧‧‧Image surface

OA1‧‧‧Optical axis

S11‧‧‧Object side of the first lens

S12‧‧‧First lens image side

S13‧‧‧Object side of second lens

S14‧‧‧Second lens image side

S15‧‧‧Aperture surface

S16‧‧‧Third lens object side

S17‧‧‧Third lens image side

S18‧‧‧Fourth lens object side

S19‧‧‧Fourth lens image side

S110‧‧‧Fifth lens object side

S111‧‧‧Fifth lens image side

S112‧‧‧The side of the filter object

S113‧‧‧Filter image side

S114‧‧‧Protect the side of the glass object

S115‧‧‧Protect the side of the glass image

Claims (10)

A wide-angle lens comprising: a first lens with negative refractive power, the first lens being a meniscus lens; a second lens with positive refractive power, the second lens being a meniscus lens; a third lens with positive refractive power, the The third lens includes a convex surface facing an object side; a fourth lens has positive refractive power; and a fifth lens has negative refractive power; wherein the first lens, the second lens, the third lens, the fourth lens, and the The fifth lens is arranged in order from the object side to an image side along an optical axis; the wide-angle lens meets the following conditions: 3<TTL/BFL<3.5; where TTL is an object side of the first lens to an image A distance between the surface on the optical axis, and the BFL is a distance from an image side surface of the fifth lens to the imaging surface on the optical axis. The wide-angle lens described in claim 1, wherein: the first lens includes a convex surface facing the object side and a concave surface facing the image side; the second lens includes a concave surface facing the object side and a convex surface facing the image The third lens includes another convex surface facing the image side; the fourth lens includes a convex surface facing the object side and another convex surface facing the image side; and the fifth lens includes a concave surface facing the object side and another The concave surface faces the image side. For the wide-angle lens described in any one of claims 1 to 2 in the scope of the patent application, the wide-angle lens satisfies the following conditions: -3<f ₂ /f ₁ <-1; where f _{1 is} the first lens An effective focal length, f _{2 is} an effective focal length of the second lens. For the wide-angle lens described in any one of claims 1 to 2 in the scope of the patent application, the wide-angle lens meets the following conditions: 1<f ₂ /f ₄ <3; where f _{2 is} one of the second lenses effective Focal length, f _{4 is} an effective focal length of the fourth lens. For the wide-angle lens described in any one of claims 1 to 2 in the scope of the patent application, the wide-angle lens satisfies the following conditions: 0.5<f ₁ /f ₅ <1.5; where f _{1 is one of} the first lenses effective Focal length, f _{5 is} an effective focal length of the fifth lens. Such as the wide-angle lens described in any one of claims 1 to 2 of the scope of the patent application, wherein the wide-angle lens meets the following conditions: 3<R ₁₁ /R ₁₂ <5;-11<R ₃₁ /R ₃₂ <-3; Wherein, R _{11 is a} radius of curvature of an object side of the first lens, R _{12 is a} radius of curvature of an image side of the first lens, and R _{31 is a} radius of curvature of an object side of the third lens. R _{32 is a} curvature radius of an image side surface of the third lens. The wide-angle lens described in any one of claims 1 to 2 of the scope of patent application, wherein the wide-angle lens satisfies the following conditions: 20<TTL/T ₁ <21.5; where T _{1 is} the first lens on the optical axis The upper one thickness. The wide-angle lens described in any one of claims 1 to 2 of the scope of the patent application, wherein the wide-angle lens meets the following conditions: 8<TTL/T ₃ <10; where T _{3 is} the third lens on the optical axis The upper one thickness. For the wide-angle lens described in any one of claims 1 to 2 in the scope of the patent application, the wide-angle lens satisfies the following conditions: 10<TTL/T ₄ <13; where T _{4 is} the fourth lens on the optical axis The upper one thickness. For example, the wide-angle lens described in any one of items 1 to 2 of the scope of patent application, wherein the wide-angle lens meets the following conditions: 72.08<TTL/AT ₃₄ <114.31;106.3<TTL/AT ₄₅ <115.7; among them, AT ₃₄ Is an air distance between the third lens and the fourth lens on the optical axis, and AT _{45 is an} air distance between the fourth lens and the fifth lens on the optical axis.

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