Wide-angle lens assembly

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

Description

Technical Field

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

[0002] The current development trend of wide-angle lenses is not only towards a larger field of view, but also requires large aperture, high resolution, resistance to environmental temperature changes, and the ability to capture both visible and infrared images to meet different application needs. Conventional wide-angle lenses can no longer meet current needs, and a new type of wide-angle lens architecture is required to simultaneously meet the requirements of a large field of view, large aperture, high resolution, resistance to environmental temperature changes, and the ability to capture both visible and infrared images. 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 small aperture value, high resolution, resistance to changes in ambient temperature, and the ability to operate simultaneously in the visible light and infrared light bands, while still possessing 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 includes a concave surface facing an image side. The second lens has refractive power. The third lens is a biconvex lens with positive refractive power and includes a convex surface facing an object side and another convex surface facing the image side. The fourth lens has positive refractive power and includes a convex surface facing the object side. The fifth lens has negative refractive power. The sixth lens has refractive power. The first, second, third, fourth, fifth, and sixth lenses are arranged sequentially along an optical axis from the object side to the image side. The wide-angle lens satisfies at least one of the following conditions: -1.55 f1 / f -1.2; 50.59 (R11+R12) / T1 91.89; 0.43 (R31+R32) / T3 4.05; -10.05 (R51+R52) / T5 0.51; 3.85mm T4+T5+T6 4.41mm;55.18 degrees / mm FOV / f 60.73 degrees / mm; where f1 is the effective focal length of one of the first lenses, f is the effective focal length of one of the wide-angle lenses, T1 is the distance on the optical axis from the object side to the image side of one of the first 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, and T5 is the distance on the optical axis from the object side to the image side of one of the fifth lenses. In this context, T6 is the distance between the object-side surface of the sixth lens and the image-side surface of the sixth lens along the optical axis; R11 is the radius of curvature of the object-side surface of the first lens; R12 is the radius of curvature of the image-side surface of the first lens; R31 is the radius of curvature of the object-side surface of the third lens; R32 is the radius of curvature of the image-side surface of the third lens; R51 is the radius of curvature of the object-side surface of the fifth lens; R52 is the radius of curvature of the image-side surface of the fifth lens; and FOV is the field of view of the wide-angle lens. When the wide-angle lens of this invention satisfies the above characteristics and requires no other additional conditions or features, the basic function of the wide-angle lens of this invention can be achieved.

[0005] The second lens has negative refractive power, and the sixth lens has positive refractive power.

[0006] The first lens is a meniscus lens and may further include a convex surface facing the object side; the second lens is a meniscus lens; the fourth lens is a biconvex lens and may further include a convex surface facing the image side; the fifth lens includes a concave surface facing the object side; and the sixth lens includes a convex surface facing the object side.

[0007] The second lens includes a convex surface facing the object side and a concave surface facing the image side; and the fifth lens is a biconcave lens, and may further include a concave surface facing the image side.

[0008] The sixth lens is a biconvex lens, and may further include a convex surface facing the image side.

[0009] The sixth lens is a meniscus lens and may further include a concave surface facing the image side.

[0010] The second lens includes a concave surface facing the object side and a convex surface facing the image side; and the fifth lens is a meniscus lens, and may further include a convex surface facing the image side.

[0011] The sixth lens is a meniscus lens and may further include a concave surface facing the image side.

[0012] The wide-angle lens of the present invention may further include an aperture disposed between the second lens and the third lens.

[0013] The wide-angle lens satisfies at least one of the following conditions: 1.1 f4 / f 1.6; 0.25 (T3+T4) / TTL 0.38; 0.005 (d23+d45) / TTL 0.04; 9.97 TTL / d12 11.71; 13.27 TTL / d56 26.79; 1.76 f / (d12+d23) 3.18; where f4 is the effective focal length of one of the fourth lenses, f is the effective focal length of the wide-angle lens, T3 is the distance from the object side of the third lens to the image side of the third lens on the optical axis, T4 is the distance from the object side of the fourth lens to the image side of the fourth lens on the optical axis, d12 is an air gap from the image side of the first lens to the object side of one of the second lenses on the optical axis, d23 is an air gap from the image side of one of the second lenses to the object side of the third lens on the optical axis, d45 is an air gap from the image side of the fourth lens to the object side of the fifth lens on the optical axis, d56 is an air gap from the image side of the fifth lens to the object side of the sixth lens on the optical axis, and TTL is the distance from the object side of the first lens to the imaging plane on the optical axis.

[0014] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Simple Explanation of the Diagram

[0015]

[0016] Figures 1, 5, and 9 are schematic diagrams of lens configurations according to the first, second, and third embodiments of the wide-angle lens of the present invention, respectively.

[0017] Figures 2, 3, and 4 are respectively the longitudinal aberration diagram, field curvature diagram, and distortion diagram of the first embodiment of the wide-angle lens according to the present invention.

[0018] Figures 6, 7, and 8 are respectively the longitudinal aberration diagram, field curvature diagram, and distortion diagram of the second embodiment of the wide-angle lens according to the present invention.

[0019] Figures 10, 11, and 12 are respectively the longitudinal aberration diagram, field curvature diagram, and distortion diagram of the third embodiment of the wide-angle lens according to the present invention. Implementation

[0020] This invention provides a wide-angle lens, comprising: a first lens having negative refractive power, the first lens including a concave surface facing an image side; a second lens having refractive power; a third lens being a biconvex lens having positive refractive power, and including a convex surface facing an object side and another convex surface facing the image side; a fourth lens having positive refractive power, the fourth lens including a convex surface facing the object side; a fifth lens having negative refractive power; and a sixth lens having refractive power; 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; wherein the wide-angle lens satisfies at least one of the following conditions: -1.55 f1 / f -1.2; 50.59 (R11+R12) / T1 91.89; 0.43 (R31+R32) / T3 4.05; -10.05 (R51+R52) / T5 0.51; 3.85mm T4+T5+T6 4.41mm;55.18 degrees / mm FOV / f 60.73 degrees / mm; where f1 is the effective focal length of one of the first lenses, f is the effective focal length of one of the wide-angle lenses, T1 is the distance on the optical axis from the object side to the image side of one of the first 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, and T5 is the distance on the optical axis from the object side to the image side of one of the fifth lenses. T6 is the distance on the optical axis between the object-side surface of the sixth lens and the image-side surface of the sixth lens; R11 is the radius of curvature of the object-side surface of the first lens; R12 is the radius of curvature of the image-side surface of the first lens; R31 is the radius of curvature of the object-side surface of the third lens; R32 is the radius of curvature of the image-side surface of the third lens; R51 is the radius of curvature of the object-side surface of the fifth lens; R52 is the radius of curvature of the image-side surface of the fifth lens; and FOV is the field of view of the wide-angle lens. When the wide-angle lens of the present invention satisfies the above features and at least one of the conditions, it is a preferred embodiment of the present invention.

[0021] 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.

[0022] Figures 1, 5, and 9 are schematic diagrams of the lens configurations of the first, second, and third embodiments of the wide-angle lens of the present invention, respectively. Among them, the first lenses L11, L21, and L31 are meniscus lenses with negative refractive power, and their object-side surfaces S11, S21, and S31 are convex surfaces, while their image-side surfaces S12, S22, and S32 are concave surfaces.

[0023] The second lens is a meniscus lens with negative refractive power, made of plastic material, and its object side surface S13, S23, S33 and image side surface S14, S24, S34 are all aspherical surfaces.

[0024] The third lenses L13, L23, and L33 are biconvex lenses with positive refractive power. They are made of plastic material, with the object side S16, S26, and S36 being convex surfaces and the image side S17, S27, and S37 being convex surfaces. The object side S16, S26, and S36 and the image side S17, S27, and S37 are all aspherical surfaces.

[0025] The fourth lenses L14, L24, and L34 are biconvex lenses with positive refractive power. They are made of plastic material, with the object side S18, S28, and S38 being convex surfaces and the image side S19, S29, and S39 being convex surfaces. The object side S18, S28, and S38 and the image side S19, S29, and S39 are all aspherical surfaces.

[0026] The fifth lenses L15, L25, and L35 have negative refractive power and are made of plastic. Their object-side surfaces S110, S210, and S310 are concave, and their image-side surfaces S111, S211, and S311 are aspherical.

[0027] The sixth lenses L16, L26, and L36 have positive refractive power and are made of plastic. Their object-side surfaces S112, S212, and S312 are convex, while the object-side surfaces S112, S212, and S312 and the image-side surfaces S113, S213, and S313 are all aspherical surfaces.

[0028] In addition, wide-angle lenses 1, 2, and 3 satisfy at least one of the following conditions (1) to (12):

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035]

[0036]

[0037]

[0038]

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050]

[0051]

[0052]

[0053] In the first to third embodiments, the important parameters are defined as follows: f1 is the effective focal length of one of the first lenses L11, L21, and L31; f4 is the effective focal length of one of the fourth lenses L14, L24, and L34; f is the effective focal length of one of the wide-angle lenses 1, 2, and 3; 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; T3 is the distance between the object-side surfaces S16, S26, and S36 of the third lenses L13, L23, and L33 and the image-side surfaces S17 and S27 of the third lenses L13, L23, and L33. S37 is a distance on the optical axes OA1, OA2, OA3; T4 is a distance from the object sides S18, S28, S38 of the fourth lenses L14, L24, L34 to the image sides S19, S29, S39 of the fourth lenses L14, L24, L34 on the optical axes OA1, OA2, 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 sixth lens... The image-side surfaces S113, S213, and S313 of lenses L16, L26, and L36 are spaced along optical axes OA1, OA2, and OA3. R11 is the radius of curvature of the object-side surfaces S11, S21, and S31 of the first lenses L11, L21, and L31. R12 is the radius of curvature of the image-side surfaces S12, S22, and S32 of the first lenses L11, L21, and L31. R31 is the radius of curvature of the object-side surfaces S16, S26, and S36 of the third lenses L13, L23, and L33. R32 is the radius of curvature of the image-side surfaces S17, S27, and S37 of the third lenses L13, L23, and L33. R51 is the radius of curvature of the object-side surface S113, S213, and S313 of the fifth lenses L15, L25, and L35. 110, S210, S310 are radii of curvature; R52 is a radius of curvature of the image sides S111, S211, S311 of the fifth lenses L15, L25, L35; d12 is an air gap on the optical axes OA1, OA2, OA3 from the image sides S12, S22, S32 of the first lenses L11, L21, L31 to the object sides S13, S23, S33 of the second lenses L12, L22, L32; d23 is an air gap on the optical axes OA1, OA2, OA3 from the image sides S14, S24, S34 of the second lenses L12, L22, L32 to the object sides S16, S26, S36 of the third lenses L13, L23, L33.d45 is the air gap between the image sides S19, S29, S39 of the fourth lenses L14, L24, L34 and the object sides S110, S210, S310 of the fifth lenses L15, L25, L35 on the optical axes OA1, OA2, OA3. d56 is the air gap between the image sides S111, S211, S311 of the fifth lenses L15, L25, L35 and the object sides S112, S212, S312 of the sixth lenses L16, L26, L36 on the optical axes OA1, OA2, OA3. TTL is the distance between the object sides S11, S21, S31 of the first lenses L11, L21, L31 and the imaging planes IMA1, IMA2, IMA3 on the optical axes OA1, OA2, OA3. FOV is the full field of view of wide-angle lenses 1, 2, and 3. This allows wide-angle lenses 1, 2, and 3 to effectively shorten the overall lens length, effectively increase the field of view, effectively resist changes in ambient temperature, and effectively correct aberrations.

[0054] When condition (1): -1.55 is met f1 / f -1.2, Condition (5): 50.59 (R11+R12) / T1 91.89、Condition (6): 0.43 (R31+R32) / T3 4.05, Condition (7): -10.05 (R51+R52) / T5 0.51, Condition (10): 3.85mm T4+T5+T6 4.41mm and condition (12): 55.18 degrees / mm FOV / f With a resolution of 60.73 degrees / mm, the overall length of the lens can be effectively shortened.

[0055] 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, along an optical axis OA1 from the object side to the image side, sequentially includes 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 protective glass CG1. During imaging, light rays from the object side are finally imaged onto an imaging plane IMA1. According to paragraphs 1 to 8 of the [Implementation Method], wherein: the object side S11 and the image side S12 of the first lens L11 are both spherical surfaces; the second lens L12 is a meniscus lens, the object side S13 is convex and the image side S14 is concave; the fifth lens L15 is a biconcave lens, the image side S111 is concave; the sixth lens L16 is a biconvex lens, the image side S113 is convex; the protective glass CG1 has both the object side S114 and the image side S115 as flat surfaces; by utilizing the above-mentioned lens, aperture ST1 and the design that satisfies at least one of conditions (1) to (12), the wide-angle lens 1 can effectively shorten the total length of the lens, effectively improve the field of view, effectively resist changes in ambient temperature, and effectively correct aberrations. When the wide-angle lens 1 of the present invention satisfies only the conditions (1) and the image side of the first lens is concave and has negative refractive power, the second lens has refractive power, the third lens is a biconvex lens and has positive refractive power, the object side of the fourth lens is convex and has positive refractive power, the fifth lens has negative refractive power, and the sixth lens has refractive power, the basic operation requirements can be achieved.

[0056] Table 1 shows the relevant parameters of each lens in wide-angle lens 1 in Figure 1.

[0057]

[0058]

[0059] Table 2 is a table of relevant parameters for the aspherical surface of the aspherical lens in Table 1.

[0060]

[0061] Table 3 shows the relevant parameter values ​​of the wide-angle lens 1 in the first embodiment and the calculated values ​​of the corresponding conditions (1) to (12). As can be seen from Table 3, the wide-angle lens 1 in the first embodiment can meet the requirements of conditions (1) to (12).

[0062]

[0063] 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 0.05mm. As shown in Figure 3, the field curvature of the wide-angle lens 1 in the first embodiment is between -0.1mm and 0.2mm. As shown in Figure 4, the distortion of the wide-angle lens 1 in the first embodiment is between -2.7% and 0%. Clearly, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 1 in the first embodiment can be effectively corrected, thereby achieving better optical performance.

[0064] The second embodiment of the wide-angle lens of the present invention will now be described in detail. Referring to Figure 5, the wide-angle lens 2, along an optical axis OA2 from the object side to the image side, sequentially includes 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 protective glass CG2. During imaging, light rays from the object side are finally imaged onto an imaging plane IMA2. According to paragraphs 1 to 8 of the [Implementation Method], the first lens L21 has a spherical surface on both its object side S21 and image side S22; the second lens L22 is a meniscus lens with a convex object side S23 and a concave image side S24; the fifth lens L25 is a biconcave lens with a concave image side S211; the sixth lens L26 is a meniscus lens with a concave image side S213; the protective glass CG2 has a flat object side S214 and an image side S215; by utilizing the above-mentioned lens, aperture ST2 and the design that satisfies at least one of conditions (1) to (12), the wide-angle lens 2 can effectively shorten the total length of the lens, effectively improve the field of view, effectively resist changes in ambient temperature, and effectively correct aberrations. When the wide-angle lens 2 of the present invention satisfies only conditions (5), (6), (7) or (10), and the first lens has a concave image side with negative refractive power, the second lens has refractive power, the third lens is a biconvex lens with positive refractive power, the fourth lens has a convex object side with positive refractive power, the fifth lens has negative refractive power, and the sixth lens has refractive power, the basic operation requirements can be met.

[0065] Table 4 shows the relevant parameters of each lens in wide-angle lens 2 in Figure 5.

[0066]

[0067]

[0068] Table 5 is a table of relevant parameters for the aspherical surface of the aspherical lens in Table 4.

[0069]

[0070] Table 6 shows the relevant parameter values ​​of the wide-angle lens 2 in the second embodiment and the calculated values ​​of the corresponding conditions (1) to (12). As can be seen from Table 6, the wide-angle lens 2 in the second embodiment can meet the requirements of conditions (1) to (12).

[0071]

[0072]

[0073] Furthermore, the optical performance of the wide-angle lens 2 in the second embodiment also meets the requirements. As shown in Figure 6, the longitudinal aberration of the wide-angle lens 2 in the second embodiment is between -0.01mm and 0.045mm. As shown in Figure 7, the field curvature of the wide-angle lens 2 in the second embodiment is between -0.2mm and 0.15mm. As shown in Figure 8, the distortion of the wide-angle lens 2 in the second embodiment is between -3.5% and 0.5%. Clearly, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 2 in the second embodiment can be effectively corrected, thereby achieving better optical performance.

[0074] The third embodiment of the wide-angle lens of the present invention will now be described in detail. Referring to Figure 9, the wide-angle lens 3, along an optical axis OA3 from the object side to the image side, sequentially includes 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 protective glass CG3. During imaging, light rays from the object side are finally imaged onto an imaging plane IMA3. According to paragraphs 1 to 8 of the [Implementation Method], the first lens L31 has an aspherical surface for both its object side S31 and image side S32; the second lens L32 is a meniscus lens with a concave object side S33 and a convex image side S34; the fifth lens L35 is a meniscus lens with a convex image side S311; the sixth lens L36 is a meniscus lens with a concave image side S313; the protective glass CG3 has a flat object side S314 and an image side S315; by utilizing the above-mentioned lens, aperture ST3 and the design that satisfies at least one of conditions (1) to (12), the wide-angle lens 3 can effectively shorten the total length of the lens, effectively improve the field of view, effectively resist changes in ambient temperature, and effectively correct aberrations. When the wide-angle lens 3 of the present invention satisfies only the conditions (12) and the first lens has a concave side with negative refractive power, the second lens has refractive power, the third lens is a biconvex lens with positive refractive power, the fourth lens has a convex side with positive refractive power, the fifth lens has negative refractive power, and the sixth lens has refractive power, the basic operation requirements can be achieved.

[0075] Table 7 shows the relevant parameters of each lens in wide-angle lens 3 in Figure 9.

[0076]

[0077] Table 8 is a table of relevant parameters for the aspherical surface of the aspherical lens in Table 7.

[0078]

[0079]

[0080] Table 9 shows the relevant parameter values ​​of the wide-angle lens 3 in the third embodiment and the calculated values ​​of the corresponding conditions (1) to (12). As can be seen from Table 9, the wide-angle lens 3 in the third embodiment can meet the requirements of conditions (1) to (12).

[0081]

[0082] Furthermore, the optical performance of the wide-angle lens 3 in the third embodiment also meets the requirements. As shown in Figure 10, the longitudinal aberration of the wide-angle lens 3 in the third embodiment is between -0.05mm and 0.02mm. As shown in Figure 11, the field curvature of the wide-angle lens 3 in the third embodiment is between -0.1mm and 0.1mm. As shown in Figure 12, the distortion of the wide-angle lens 3 in the third embodiment is between -12% and 0%. Clearly, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 3 in the third embodiment can be effectively corrected, thereby achieving better optical performance.

[0083] The aforementioned wide-angle lenses 1, 2, and 3, when used in the visible light band, have the same imaging surface position as when used in the infrared light band, and can maintain image clarity at high or low temperatures without image quality degradation due to temperature changes.

[0084] 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 refinements 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.

[0085]

[0086] 1, 2, 3: Wide-angle lens

[0087] L11, L21, L31: First lens

[0088] L12, L22, L32: Second lenses

[0089] ST1, ST2, ST3: Aperture

[0090] L13, L23, L33: Third lens

[0091] L14, L24, L34: Fourth lens

[0092] L15, L25, L35: Fifth lens

[0093] L16, L26, L36: Sixth lens

[0094] CG1, CG2, CG3: Protective Glass

[0095] IMA1, IMA2, IMA3: Imaging plane

[0096] OA1, OA2, OA3: Optical axis

[0097] S11, S21, S31: Side surface of the first lens

[0098] S12, S22, S32: Side view of the first lens

[0099] S13, S23, S33: Side surface of the second lens

[0100] S14, S24, S34: Side view of the second lens

[0101] S15, S25, S35: Aperture plane

[0102] S16, S26, S36: Side surface of the third lens

[0103] S17, S27, S37: Side view of the third lens image

[0104] S18, S28, S38: Side surface of the fourth lens

[0105] S19, S29, S39: Side view of the fourth lens

[0106] S110, S210, S310: Side surface of the fifth lens

[0107] S111, S211, S311: Side view of the fifth lens

[0108] S112, S212, S312: Side surface of the sixth lens

[0109] S113, S213, S313: Side view of the sixth lens image

[0110] S114, S214, S314: Protect the sides of glass objects

[0111] S115, S215, S315: Protective glass for the side image

Claims

1. A wide-angle lens, comprising: A first lens has negative refractive power, the first lens including a concave surface facing an image side; A second lens has refractive power; a third lens is a biconvex lens with positive refractive power, and includes a convex surface facing an object side and another convex surface facing the image side; a fourth lens has positive refractive power, the fourth lens including a convex surface facing the object side; a fifth lens has negative refractive power; and a sixth lens has refractive power; 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; wherein the wide-angle lens satisfies at least one of the following conditions: -1.55f1 / f-1.2; 50.59(R11+R12) / T191.89; 0.43(R31+R32) / T34.05; -10.05(R51+R52) / T50.51; 3.85mmT4+T5+T64.41mm; 55.18 degrees / mm FOV / f 60.73 degrees / mm; where f1 is the effective focal length of one of the first lenses, f is the effective focal length of one of the wide-angle lenses, T1 is the distance on the optical axis from the object side to the image side of one of the first 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 between the object-side surface of the sixth lens and the image-side surface of the sixth lens on the optical axis, R11 is the radius of curvature of the object-side surface of the first lens, R12 is the radius of curvature of the image-side surface of the first lens, R31 is the radius of curvature of the object-side surface of the third lens, R32 is the radius of curvature of the image-side surface of the third lens, R51 is the radius of curvature of the object-side surface of the fifth lens, R52 is the radius of curvature of the image-side surface of the fifth lens, and FOV is the field of view of the wide-angle lens.

2. The wide-angle lens as described in claim 1, wherein the second lens has negative refractive power and the sixth lens has positive refractive power.

3. The wide-angle lens as described in claim 2, wherein: The first lens is a meniscus lens and further includes a convex surface facing the object side; the second lens is a meniscus lens; the fourth lens is a biconvex lens and further includes a convex surface facing the image side; the fifth lens includes a concave surface facing the object side; and the sixth lens includes a convex surface facing the object side.

4. The wide-angle lens as described in claim 3, wherein: The second lens includes a convex surface facing the object side and a concave surface facing the image side; and the fifth lens is a biconcave lens, and further includes a concave surface facing the image side.

5. The wide-angle lens as described in claim 4, wherein the sixth lens is a biconvex lens and further includes a convex surface facing the image side.

6. The wide-angle lens as described in claim 4, wherein the sixth lens is a meniscus lens and further includes a concave surface facing the image side.

7. The wide-angle lens as described in claim 3, wherein: The second lens includes a concave surface facing the object side and a convex surface facing the image side; and the fifth lens is a meniscus lens, and further includes a convex surface facing the image side.

8. The wide-angle lens as described in claim 7, wherein the sixth lens is a meniscus lens and further includes a concave surface facing the image side.

9. The wide-angle lens as described in claim 1, further comprising an aperture disposed between the second lens and the third lens.

10. A wide-angle lens as described in any one of claims 1 to 9 of the patent application, wherein the wide-angle lens satisfies at least one of the following conditions: 1.1 f / 4 / f / 1.6; 0.25(T3+T4) / TTL0.38; 0.005(d23+d45) / TTL0.04; 9.97TTL / d1211.71; 13.27TTL / d5626.79; 1.76 f / (d12+d23)3.18; wherein, f4 is the effective focal length of one of the fourth lenses, f is the effective focal length of the wide-angle lens, T3 is the distance on the optical axis from the object side of the third lens to the image side of the third lens, T4 is the distance on the optical axis from the object side of the fourth lens to the image side of the fourth lens, d12 is an air gap on the optical axis from the image side of the first lens to the object side of one of the second lenses, d23 is an air gap on the optical axis from the image side of one of the second lenses to the object side of the third lens, d45 is an air gap on the optical axis from the image side of the fourth lens to the object side of the fifth lens, d56 is an air gap on the optical axis from the image side of the fifth lens to the object side of the sixth lens, and TTL is the distance on the optical axis from the object side of the first lens to the imaging plane.

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