Wide-angle lens assembly

Abstract

A wide-angle lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has refractive power. The second lens has refractive power and includes a convex surface facing an object side. The third lens has positive refractive power. The fourth lens has refractive power and includes a convex surface facing the object side. The fifth lens has positive refractive power and includes a convex surface facing the object side. The sixth lens has refractive power and includes a concave surface facing an image side. The number of lenses with refractive power does not exceed six. The first, second, third, fourth, fifth, and sixth lenses are arranged sequentially along an optical axis from the object side to the image side.

Description

[Technical Field]

[0001] This invention relates to a wide-angle lens. [Previous Technology]

[0002] The current development trend of wide-angle lenses is not only towards a larger field of view, but also requires miniaturization and high resolution to meet different application needs. Conventional wide-angle lenses can no longer meet the current needs, and a new architecture of wide-angle lenses is needed to simultaneously meet the requirements of a large field of view, miniaturization and high resolution. [Summary of the Invention]

[0003] In view of this, the main objective of the present invention is to provide a wide-angle lens with a large field of view, a short total length, and high resolution, while still having good optical performance.

[0004] This invention provides a wide-angle lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has refractive power. The second lens has refractive power and includes a convex surface facing an object side. The third lens has positive refractive power. The fourth lens has refractive power and includes a convex surface facing the object side. The fifth lens has positive refractive power and includes a convex surface facing the object side. The sixth 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, and the sixth lens are arranged sequentially along an optical axis from the object side to the image side. When the wide-angle lens of this invention satisfies the above features and no other additional conditions or features are required, the basic function of the wide-angle lens of this invention can be achieved.

[0005] The second lens is a biconvex lens with positive refractive power, and may further include another convex surface facing the image side.

[0006] This invention provides another wide-angle lens comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The first lens has refractive power. The second lens is a biconvex lens with positive refractive power and includes a convex surface facing an object side and another convex surface facing an image side. The third lens has positive refractive power. The fourth lens has refractive power and includes a convex surface facing the object side. The fifth lens has refractive power. 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 arranged sequentially along an optical axis from the object side to the image side. When the wide-angle lens of this invention satisfies the above features and no other additional conditions or features are required, the basic function of the wide-angle lens of this invention can be achieved.

[0007] The fifth lens has positive refractive power and includes a convex surface facing the object.

[0008] The first lens has negative refractive power, the fourth lens has negative refractive power, and the sixth lens has negative refractive power.

[0009] The first lens is a meniscus lens and includes a convex surface facing the object side and a concave surface facing the image side; the third lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side; the fourth lens is a meniscus lens and may further include a concave surface facing the image side; the fifth lens is a biconvex lens and may further include another convex surface facing the image side; and the sixth lens is a biconcave lens and may further include another concave surface facing the object side.

[0010] It may further include an aperture disposed between the second lens and the third lens.

[0011] The wide-angle lens satisfies at least one of the following conditions: 24mm²(R41-R51)×T342mm²; 0.1(f1+f5) / d3410.7; 5.01mm(f1-f6)×Vd420.31mm; 10mm(R22)² / f333mm; 3.9mm²(T1+T4+T5)×f311.5mm²; 9mm(f6)² / (R11+R22)19mm; 9.5mm-1R5² / R61 / d3427.2mm-1; 9R61 / ((f6 / f4)+R5 2) 12.2; 20mm-2Nd3 / (R31×d34)55mm-2; 152mm(T1+T2+T3+T4+T5+T6)2 / (R32+R42)274mm; where f1 is one of the effective focal lengths of the first lens, f3 is one of the effective focal lengths of the third lens, f4 is one of the effective focal lengths of the fourth lens, f5 is one of the effective focal lengths of the fifth lens, f6 is one of the effective focal lengths of the sixth lens, T1 is the distance from the object side to the image side of the first lens on the optical axis, and T2 is the distance from the object side to the image side of the second lens. T3 is the distance between the object side and the image side of the third lens on the optical axis; T4 is the distance between the object side and the image side of the fourth lens on the optical axis; T5 is the distance between the object side and the image side of the fifth lens on the optical axis; T6 is the distance between the object side and the image side of the sixth lens on the optical axis; R11 is the radius of curvature of the object side of the first lens; R22 is the radius of curvature of the image side of the second lens; R31 is the distance between the object side and the image side of the third lens on the optical axis; R4 is the distance between the object side and the image side of the fourth lens on the optical axis; T5 is the distance between the object side and the image side of the fifth lens on the optical axis; T6 is the distance between the object side and the image side of the sixth lens on the optical axis; R11 is the radius of curvature of the object side of the first lens; R22 is the radius of curvature of the image side of the second lens; R31 is the radius of curvature of the image side of the third lens; R4 is the distance between the object side and the image side of the fourth lens on the optical axis; R5 is the distance between the object side and the image side of the fifth lens on the optical axis; R6 is the distance between the object side and the image side of the sixth lens on the optical axis; R7 is the radius of curvature of the object side of the first lens; R8 is the radius of curvature of the image side of the second lens; R9 is the radius of curvature of the image side of the third lens; R11 is the radius of curvature of the object side of the first lens; R22 is the radius of curvature of the image side of the second lens; R31 ... R32 is the radius of curvature of the object side of the third lens, R41 is the radius of curvature of the object side of the fourth lens, R42 is the radius of curvature of the image side of the fourth lens, R51 is the radius of curvature of the object side of the fifth lens, R52 is the radius of curvature of the image side of the fifth lens, R61 is the radius of curvature of the object side of the sixth lens, d34 is the air gap on the optical axis between the image side of the third lens and the object side of the fourth lens, Vd4 is the Abbe coefficient of the fourth lens, and Nd3 is the refractive index of the third lens.

[0012] In order to make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. [Simplified Explanation of the Diagram]

[0013] Figures 1, 6, and 11 are schematic diagrams of lens configuration and optical path according to the first, second, and third embodiments of the wide-angle lens of the present invention, respectively.

[0013] Figures 2, 3, 4 and 5 are respectively the Longitudinal Aberration, Field Curvature, Distortion and Relative Illumination diagrams of the first embodiment of the wide-angle lens according to the present invention.

[0013] Figures 7, 8, 9, and 10 are respectively the longitudinal aberration diagram, field curvature diagram, distortion diagram, and relative illumination diagram of the second embodiment of the wide-angle lens according to the present invention.

[0013] Figures 12, 13, 14, and 15 are respectively the longitudinal aberration diagram, field curvature diagram, distortion diagram, and relative illumination diagram of the third embodiment of the wide-angle lens according to the present invention.

Implementation Method

[0014] This invention provides a wide-angle lens, comprising: a first lens having refractive power; a second lens having refractive power, the second lens including a convex surface facing an object side; a third lens having positive refractive power; a fourth lens having refractive power, the fourth lens including a convex surface facing the object side; a fifth lens having positive refractive power, the fifth lens including a convex surface facing the object side; and a sixth lens having refractive power, the sixth lens including a concave surface facing an image side; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged sequentially along an optical axis from the object side to the image side. When the wide-angle lens of this invention satisfies the above features, it is a preferred embodiment of this invention.

[0015] The present invention provides another wide-angle lens, comprising: a first lens having refractive power; a second lens being a biconvex lens having positive refractive power, and including a convex surface facing an object side and another convex surface facing an image side; a third lens having positive refractive power; a fourth lens having refractive power, and including a convex surface facing the object side; a fifth lens having refractive power; and a sixth lens having refractive power, the sixth lens including 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 arranged sequentially along an optical axis from the object side to the image side. When the wide-angle lens of the present invention satisfies the above features, it is a preferred embodiment of the present invention.

[0016] Please refer to Tables 1, 2, 4, 5, 7, and 8 below. Tables 1, 4, and 7 are the relevant parameter tables for each lens in the first to third embodiments of the wide-angle lens according to the present invention. Tables 2, 5, and 8 are the relevant parameter tables for the aspherical surface of the aspherical lens in Tables 1, 4, and 7. In the following embodiments, the aspherical surface concavity z of the aspherical lens is obtained by the following formula: z=ch2 / {1+[1-(k+1)c2h2]1 / 2}+Ah4+Bh6+Ch8+Dh10+Eh12+..., where: c is the curvature, h is the perpendicular distance from any point on the lens surface to the optical axis, k is the conic constant, and A~E are the aspherical coefficients, which are expressed in scientific notation, for example, 2E-03 represents 2×10-3.

[0017] Figures 1, 6, and 11 are schematic diagrams of lens configuration and optical path of the first, second, and third embodiments of the wide-angle lens of the present invention, respectively. Among them, the first lens L11, L21, and L31 are meniscus lenses with negative refractive power, made of plastic material, with the object-side surfaces S11, S21, and S31 being convex surfaces and the image-side surfaces S12, S22, and S32 being concave surfaces. The object-side surfaces S11, S21, and S31 and the image-side surfaces S12, S22, and S32 are all aspherical surfaces.

[0018] The second lenses L12, L22, and L32 are biconvex lenses with positive refractive power and are made of plastic. Their object-side surfaces S13, S23, and S33 are convex, and their image-side surfaces S14, S24, and S34 are convex. The object-side surfaces S13, S23, and S33 and the image-side surfaces S14, S24, and S34 are all aspherical surfaces.

[0019] The third lenses L13, L23, and L33 are biconvex lenses with positive refractive power. They are made of plastic material. Their object-side surfaces S16, S26, and S36 are convex surfaces, and their image-side surfaces S17, S27, and S37 are convex surfaces. The object-side surfaces S16, S26, and S36 and the image-side surfaces S17, S27, and S37 are all aspherical surfaces.

[0020] The fourth lenses L14, L24, and L34 are meniscus lenses with negative refractive power. They are made of plastic material. Their object-side surfaces S18, S28, and S38 are convex, and their image-side surfaces S19, S29, and S39 are concave. Both the object-side surfaces S18, S28, and S38 and the image-side surfaces S19, S29, and S39 are aspherical surfaces.

[0021] The fifth lenses L15, L25, and L35 are biconvex lenses with positive refractive power. They are made of plastic material. Their object-side surfaces S110, S210, and S310 are convex, and their image-side surfaces S111, S211, and S311 are convex. Both the object-side surfaces S110, S210, and S310 and the image-side surfaces S111, S211, and S311 are aspherical surfaces.

[0022] The sixth lenses L16, L26, and L36 are biconcave lenses with negative refractive power. They are made of plastic material. Their object-side surfaces S112, S212, and S312 are concave, and their image-side surfaces S113, S213, and S313 are concave. Both the object-side surfaces S112, S212, and S312 and the image-side surfaces S113, S213, and S313 are aspherical surfaces.

[0023] In addition, wide-angle lenses 1, 2, and 3 satisfy at least one of the following conditions (1) to (10):

[0024]

[0025]

[0026]

[0027]

[0028]

[0029]

[0030]

[0031]

[0032]

[0033] mm; (10)

[0034] The important parameters in the first to third embodiments are defined as follows: f1 is the effective focal length of one of the first lenses L11, L21, and L31; f3 is the effective focal length of one of the third lenses L13, L23, and L33; f4 is the effective focal length of one of the fourth lenses L14, L24, and L34; f5 is the effective focal length of one of the fifth lenses L15, L25, and L35; f6 is the effective focal length of one of the sixth lenses L16, L26, and L36; and T1 is the distance between the object-side surfaces S11, S21, and S31 of the first lenses L11, L21, and L31 and the image-side surfaces S12, S22, and S32 of the first lenses L11, L21, and L31 on the optical axes OA1, OA2, and OA3. T2 is the distance from the object-side surfaces S13, S23, S33 of the second lenses L12, L22, L32 to the image-side surfaces S14, S24, S34 of the second lenses L12, L22, L32 along the optical axes OA1, OA2, OA3. T3 is the distance from the object-side surfaces S16, S26, S36 of the third lenses L13, L23, L33 to the image-side surfaces S17, S27, S37 of the third lenses L13, L23, L33 along the optical axes OA1, OA2, OA3. T4 is the distance from the object-side surfaces S18, S28, S38 of the fourth lenses L14, L24, L34 to the image-side surfaces S19, S29, S39 of the fourth lenses L14, L24, L34 along the optical axes OA1, OA2, OA3. 2. A distance on OA3, T5 is a distance from the object sides S110, S210, S310 of the fifth lenses L15, L25, L35 to the image sides S111, S211, S311 of the fifth lenses L15, L25, L35 on the optical axes OA1, OA2, OA3, T6 is a distance from the object sides S112, S212, S312 of the sixth lenses L16, L26, L36 to the image sides S113, S213, S313 of the sixth lenses L16, L26, L36 on the optical axes OA1, OA2, OA3, R11 is a radius of curvature of the object sides S11, S21, S31 of the first lenses L11, L21, L31, R22 is a distance from the second lens to the image sides S11, S21, S31 of the first lenses L11, L21, L31, R22 is a distance from the image sides S11, S21, S31 of the second lenses L11, L21, L31, R22 is a distance from the image sides S11, S21, S31 of the first ... R31 is one of the radii of curvature of the image sides S14, S24, and S34 of the third lenses L13, L23, and L33; R32 is one of the radii of curvature of the image sides S17, S27, and S37 of the third lenses L13, L23, and L33; R41 is one of the radii of curvature of the image sides S18, S28, and S38 of the fourth lenses L14, L24, and L34; R42 is one of the radii of curvature of the image sides S19, S29, and S39 of the fourth lenses L14, L24, and L34; and R51 is one of the radii of curvature of the image sides S110, S210, and S310 of the fifth lenses L15, L25, and L35.R52 is the radius of curvature of the image-side surfaces S111, S211, and S311 of the fifth lenses L15, L25, and L35; R61 is the radius of curvature of the object-side surfaces S112, S212, and S312 of the sixth lenses L16, L26, and L36; d34 is the air gap between the image-side surfaces S17, S27, and S37 of the third lenses L13, L23, and L33 and the object-side surfaces S18, S28, and S38 of the fourth lenses L14, L24, and L34 on the optical axes OA1, OA2, and OA3; Vd4 is the Abbe coefficient of the fourth lens L14, L24, and L34; and Nd3 is the refractive index of the third lenses L13, L23, and L33. This allows wide-angle lenses 1, 2, and 3 to effectively improve the field of view, effectively shorten the overall lens length, effectively improve resolution, and effectively correct aberrations.

[0035] When condition (1) is met: 24mm²(R41-R51)×T342mm², aberrations can be effectively corrected and resolution improved. When condition (2) is met: 0.1(f1+f5) / d3410.7, aberrations can be effectively corrected and resolution improved. When condition (3) is met: 5.01mm(f1-f6)×Vd420.31mm, aberrations can be effectively corrected and resolution improved. When condition (4) is met: 10mm(R22)² / f333mm, the radius of curvature and air gap can be effectively controlled to correct aberrations. When condition (5) is met: 3.9mm²(T1+T4+T5)×f311.5mm², the thickness of the first lens, the fourth lens, and the fifth lens, as well as the effective focal length of the third lens, can be effectively controlled to correct off-axis aberrations. When condition (6) is met: 9mm(f6)² / (R11+R22)19mm, the thickness and effective focal length can be effectively controlled to correct off-axis aberration. When condition (7) is met: 9.5mm-1R52 / R61 / d3427.2mm-1, the thickness and effective focal length can be effectively controlled to correct off-axis aberration. When condition (8) is met: 9R61 / ((f6 / f4)+R52)12.2, chromatic aberration can be effectively corrected and resolution improved. When condition (9) is met: 20mm-2Nd3 / (R31×d34)55mm-2, the refractive power of the wide-angle lens can be effectively improved to control the field of view and help correct aberration. When condition (10) is met: 152mm(T1+T2+T3+T4+T5+T6)² / (R32+R42)274mm, aberration can be effectively corrected and resolution improved.

[0036] The first embodiment of the wide-angle lens of the present invention will now be described in detail. Referring to Figure 1, the wide-angle lens 1 includes, in sequence along an optical axis OA1 from the object side to the image side, a first lens L11, a second lens L12, an aperture ST1, a third lens L13, a fourth lens L14, a fifth lens L15, a sixth lens L16, and a filter OF1. During imaging, the light rays from the object side are finally imaged onto an imaging plane IMA1. According to paragraphs 1 to 9 of the [Embodiment], the object side S114 and the image side S115 of the filter OF1 are both planar; by utilizing the above-mentioned lens, aperture ST1, and the design that satisfies at least one of conditions (1) to (10), the wide-angle lens 1 can effectively improve the field of view, effectively shorten the total length of the lens, effectively improve the resolution, and effectively correct aberrations. When the wide-angle lens of the present invention satisfies only conditions (1), (2), (3), (4), (5), (6), (7), (8), (9), or (10), and the third and fifth lenses respectively have positive and positive refractive power, the object side of the second lens is convex, the object side of the fourth lens is convex, the object side of the fifth lens is convex, and the image side of the sixth lens is concave, the basic operation requirements can be met.

[0037] Table 1 is a table of relevant parameters of each lens of the wide-angle lens 1 in Figure 1.

[0037]

[0038] Table 2 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 1.

[0038]

[0039] 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 (10). As can be seen from Table 3, the wide-angle lens 1 of the first embodiment can meet the requirements of conditions (1) to (10).

[0039]

[0040] Furthermore, the optical performance of the wide-angle lens 1 in the first embodiment also meets the requirements. As shown in Figure 2, the longitudinal aberration of the wide-angle lens 1 in the first embodiment is between -0.01mm and 0.12mm. As shown in Figure 3, the field curvature of the wide-angle lens 1 in the first embodiment is between -0.02mm and 0.25mm. As shown in Figure 4, the distortion of the wide-angle lens 1 in the first embodiment is between -8% and 2%. As shown in Figure 5, the relative illumination of the wide-angle lens 1 in the first embodiment is between 0.21 and 1.0. It is evident that the longitudinal aberration, field curvature, and distortion of the wide-angle lens 1 in the first embodiment can be effectively corrected, thereby obtaining better optical performance.

[0041] The second embodiment of the wide-angle lens of the present invention will now be described in detail. Referring to Figure 6, the wide-angle lens 2 includes, in sequence along an optical axis OA2 from the object side to the image side, a first lens L21, a second lens L22, an aperture ST2, a third lens L23, a fourth lens L24, a fifth lens L25, a sixth lens L26, and a filter OF2. During imaging, the light from the object side is finally imaged onto an imaging plane IMA2. According to the first to ninth paragraphs of

Embodiment

[0042] Table 4 is a table of relevant parameters for each lens of wide-angle lens 2 in Figure 6.

[0042]

[0043] Table 5 is a table of relevant parameters of the aspherical surface of the aspherical lens in Table 4.

[0043]

[0043]

[0044] 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 (10). As can be seen from Table 6, the wide-angle lens 2 of the second embodiment can meet the requirements of conditions (1) to (10).

[0044]

[0045] Furthermore, the optical performance of the wide-angle lens 2 in the second embodiment also meets the requirements. As shown in Figure 7, the longitudinal aberration of the wide-angle lens 2 in the second embodiment is between -0.01mm and 0.14mm. As shown in Figure 8, the field curvature of the wide-angle lens 2 in the second embodiment is between -0.01mm and 0.14mm. As shown in Figure 9, the distortion of the wide-angle lens 2 in the second embodiment is between -5% and 5%. As shown in Figure 10, the relative illumination of the wide-angle lens 2 in the second embodiment is between 0.32 and 1.0. It is evident that the longitudinal aberration, field curvature, and distortion of the wide-angle lens 2 in the second embodiment can be effectively corrected, thereby obtaining better optical performance.

[0046] The third embodiment of the wide-angle lens of the present invention will now be described in detail. Referring to Figure 11, the wide-angle lens 3 includes, in sequence along an optical axis OA3 from the object side to the image side, a first lens L31, a second lens L32, an aperture ST3, a third lens L33, a fourth lens L34, a fifth lens L35, a sixth lens L36, and a filter OF3. During imaging, the light from the object side is finally imaged onto an imaging plane IMA3. According to the first to ninth paragraphs of

Embodiment

[0047] Table 7 is a table of relevant parameters for each lens of wide-angle lens 3 in Figure 11.

[0047]

[0048] Table 8 is a table of relevant parameters for the aspherical surface of the aspherical lens in Table 7.

[0048]

[0048]

[0049] 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 (10). As can be seen from Table 9, the wide-angle lens 3 of the third embodiment can meet the requirements of conditions (1) to (10).

[0049]

[0050] Furthermore, the optical performance of the wide-angle lens 3 in the third embodiment also meets the requirements. As shown in Figure 12, the longitudinal aberration of the wide-angle lens 3 in the third embodiment is between -0.01mm and 0.12mm. As shown in Figure 13, the field curvature of the wide-angle lens 3 in the third embodiment is between -0.01mm and 0.14mm. As shown in Figure 14, the distortion of the wide-angle lens 3 in the third embodiment is between -5% and 5%. As shown in Figure 15, the relative illumination of the wide-angle lens 3 in the third embodiment is between 0.32 and 1.0. It is evident that the longitudinal aberration, field curvature, and distortion of the wide-angle lens 3 in the third embodiment can be effectively corrected, thereby obtaining better optical performance.

[0051] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A wide-angle lens, comprising: A first lens has refractive power, the first lens including a convex surface facing an object side; A second lens has refractive power and includes a convex surface facing the object side; a third lens has positive refractive power; a fourth lens has refractive power and includes a convex surface facing the object side; a fifth lens has positive refractive power and includes a convex surface facing the object side; and a sixth lens is a biconcave lens with refractive power, including a concave surface facing an image side and another concave surface facing the object side; wherein the number of lenses with refractive power is not more than six; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged sequentially along an optical axis from the object side to the image side.

2. The wide-angle lens as described in claim 1, wherein the second lens is a biconvex lens with positive refractive power, and further includes another convex surface facing the image side.

3. A wide-angle lens, comprising: A first lens has refractive power, the first lens including a convex surface facing an object side; A second 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; a third lens has positive refractive power; a fourth lens has refractive power, the fourth lens including a convex surface facing the object side; a fifth lens has refractive power; and a sixth lens is a biconcave lens with refractive power, the sixth lens including a concave surface facing the image side and another concave surface facing the object side; wherein the number of lenses with refractive power is no more than six; wherein the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are arranged sequentially along an optical axis from the object side to the image side.

4. The wide-angle lens as described in claim 3, wherein the fifth lens has positive refractive power and includes a convex surface facing the object side.

5. A wide-angle lens as described in any one of claims 1 to 4 of the patent application, wherein the first lens has negative refractive power, the fourth lens has negative refractive power, and the sixth lens has negative refractive power.

6. The wide-angle lens as described in claim 5, wherein: The first lens is a meniscus lens and further includes a concave surface facing the image side; the third lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side; the fourth lens is a meniscus lens and further includes a concave surface facing the image side; and the fifth lens is a biconvex lens and further includes another convex surface facing the image side.

7. The wide-angle lens as described in claim 6, further comprising an aperture disposed between the second lens and the third lens.

8. A wide-angle lens as described in any one of claims 1 to 4 of the patent application, wherein the wide-angle lens satisfies at least one of the following conditions: 24mm² (R41-R51) × T342mm²; 0.1(f1+f5) / d341 0.7; 5.01mm(f1-f6) × Vd42 0.31mm; 10mm(R22)² / f333mm; 3.9mm² (T1+T4+T5)×f311.5mm2; 9mm(f6)2 / (R11+R22)19mm; 9.5mm-1R52 / R61 / d3427.2mm-1 ;20mm-2Nd3 / (R31×d34)55mm-2;152mm(T1+T2+T3+T4+T5+T6)2 / (R32+R42)274mm; among which, f1 is the effective focal length of one of the first lenses, f3 is the effective focal length of one of the third lenses, f5 is the effective focal length of one of the fifth lenses, f6 is the effective focal length of one of the sixth lenses, T1 is the distance on the optical axis from the object side to the image side of one of the first lenses, T2 is the distance on the optical axis from the object side to the image side of one of the second lenses, T3 is the distance on the optical axis from the object side to the image side of one of the third lenses, T4 is the distance on the optical axis from the object side to the image side of one of the fourth lenses, T5 is the distance on the optical axis from the object side to the image side of one of the fifth lenses, and T6 is the distance on the optical axis from the object side to the image side of one of the sixth lenses. A distance R11 is the radius of curvature of the object side of the first lens, R22 is the radius of curvature of the image side of the second lens, R31 is the radius of curvature of the object side of the third lens, R32 is the radius of curvature of the image side of the third lens, R41 is the radius of curvature of the object side of the fourth lens, R42 is the radius of curvature of the image side of the fourth lens, R51 is the radius of curvature of the object side of the fifth lens, R52 is the radius of curvature of the image side of the fifth lens, R61 is the radius of curvature of the object side of the sixth lens, d34 is the air gap between the image side of the third lens and the object side of the fourth lens on the optical axis, Vd4 is the Abbe coefficient of the fourth lens, and Nd3 is the refractive index of the third lens.

Images