Wide-angle lens

Abstract

A wide-angle lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has refractive power and comprises a concave surface facing an image side. The second lens has refractive power. The third lens has positive refractive power and comprises a convex surface facing the image side. The fourth lens element has refractive power. The fifth lens has negative refractive power and comprises a concave surface facing an object side. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are sequentially arranged from the object side to the image side along an optical axis.

Description

Technical Field

[0001] The present invention relates to a wide-angle lens. Background Art

[0002] The current development trend of wide-angle lenses, in addition to continuously moving towards a large field of view, also needs to have the characteristics of miniaturization and high resolution with different application requirements. Existing wide-angle lenses can no longer meet the current needs, and a new architecture of wide-angle lens is required 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 object of the present invention is to provide a wide-angle lens with a shorter overall lens length but still having good optical performance.

[0004] The present invention provides a wide-angle lens including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has a refractive power, and the first lens includes a concave surface facing an image side. The second lens has a refractive power. The third lens has a positive refractive power, and the third lens includes a convex surface facing the image side. The fourth lens has a refractive power. The fifth lens has a negative refractive power, and the fifth lens includes a concave surface facing an object side. The first lens, the second lens, the third lens, the fourth lens, and the fifth lens are sequentially arranged along an optical axis from the object side to the image side. The wide-angle lens satisfies at least one of the following conditions: 16 ≤ f2 - Vd2 ≤ 43; 11.09 ≤ f2 / f ≤ 18.52; -23.7 ≤ (R51 + R52) / T5 ≤ -8.3; 16.5 ≤ TTL / T23 ≤ 29.7; 42.2 ≤ TTL / T45 ≤ 173.1; where f is the optical axis of the wide-angle lens, f2 is the optical axis of the second lens, Vd2 is the Abbe number of the second lens, R51 is the curvature radius of the object side surface of the fifth lens, R52 is the curvature radius of the image side surface of the fifth lens, T23 is the air spacing on the optical axis from the image side surface of the second lens to the object side surface of the third lens, T45 is the air spacing on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens, T5 is the spacing on the optical axis from the object side surface of the fifth lens to the image side surface of the fifth lens, and TTL is the spacing on the optical axis from the object side surface of the first lens to the imaging surface. When the wide-angle lens of the present invention satisfies the above characteristics and does not require other additional features or conditions, the basic functions of the wide-angle lens of the present invention can be achieved.

[0005] Among them, the first lens has a negative refractive power, the second lens has a positive refractive power, and the fourth lens has a positive refractive power.

[0006] Among them, the second lens is a meniscus lens and includes a convex surface facing the object side and a concave surface facing the image side.

[0007] The fourth lens is a biconvex lens, and includes a convex surface facing the object side and another convex surface facing the image side.

[0008] The first lens is a meniscus lens, and further includes a convex surface facing the object side.

[0009] The third lens is a meniscus lens, and further includes a concave surface facing the object side, and the fifth lens is a meniscus lens, and further includes a convex surface facing the image side.

[0010] The third lens is a biconvex lens, and further includes another convex surface facing the object side, and the fifth lens is a meniscus lens, and further includes a convex surface facing the image side.

[0011] The first lens is a biconcave lens, and further includes another concave surface facing the object side, the third lens is a biconvex lens, and further includes another convex surface facing the object side, and the fifth lens is a meniscus lens, and further includes a convex surface facing the image side.

[0012] Furthermore, an aperture is disposed between the second lens and the third lens.

[0013] The wide-angle lens satisfies at least one of the following conditions: -0.5mm -1 ≤(TTL / f) / R31≤1mm -1 ; -20≤(R11 - R31) / f2≤5.5; -1.6mm≤R11 / Vd2≤1.4mm; where f is the effective focal length of the wide-angle lens, f2 is the effective focal length of the second lens, Vd2 is the Abbe number of the second lens, R11 is the radius of curvature of the object side surface of the first lens, R31 is the radius of curvature of the object side surface of the third lens, and TTL is the distance between the object side surface of the first lens and the imaging surface on the optical axis.

[0014] The wide-angle lens of the present invention has a relatively large field of view, a relatively short overall lens length, and a relatively high resolution, but still has good optical performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specifically illustrates preferred embodiments in conjunction with the accompanying drawings.

[0016] Figure 1 It is a lens configuration and optical path schematic diagram of a first embodiment of the wide-angle lens according to the present invention.

[0017] Figure 2 、 3, 4 are 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] Figure 5 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.

[0019] Figure 6 , 7 , 8 are the longitudinal aberration diagram, field curvature diagram, and distortion diagram of the second embodiment of the wide-angle lens according to the present invention.

[0020] Figure 9 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.

[0021] Figure 10 , 11 , 12 are the longitudinal aberration diagram, field curvature diagram, and distortion diagram of the third embodiment of the wide-angle lens according to the present invention.

[0022] Figure 13 is a schematic diagram of the lens configuration and optical path of the fourth embodiment of the wide-angle lens according to the present invention. Detailed implementation manners

[0023] The present invention provides a wide-angle lens, comprising: a first lens having a refractive power, the first lens including a concave surface facing an image side; a second lens having a refractive power; a third lens having a positive refractive power, the third lens including a convex surface facing the image side; a fourth lens having a refractive power; and a fifth lens having a negative refractive power, the fifth lens including a concave surface facing an object side; wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence 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: 16 ≤ f2 - Vd2 ≤ 43; 11.09 ≤ f2 / f ≤ 18.52; -23.7 ≤ (R51 + R52) / T5 ≤ -8.3; 16.5 ≤ TTL / T23 ≤ 29.7; 42.2 ≤ TTL / T45 ≤ 173.1; wherein, f is the optical axis of the wide-angle lens, f2 is the optical axis of the second lens, the unit of f2 is mm, Vd2 is the Abbe number of the second lens, R51 is the curvature radius of the object side surface of the fifth lens, R52 is the curvature radius of the image side surface of the fifth lens, T23 is the air spacing on the optical axis from the image side surface of the second lens to the object side surface of the third lens, T45 is the air spacing on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens, T5 is the spacing on the optical axis from the object side surface of the fifth lens to the image side surface of the fifth lens, and TTL is the spacing on the optical axis from the object side surface of the first lens to the imaging surface. 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.

[0024] Please refer to Table 1, Table 2, Table 4, Table 5, Table 7, Table 8, Table 10, and Table 11 below. Among them, Table 1, Table 4, Table 7, and Table 10 are the relevant parameter tables of each lens of the first to fourth embodiments of the wide-angle lens according to the present invention, and Table 2, Table 5, Table 8, and Table 11 are the relevant parameter tables of the aspherical surfaces of the aspherical lenses in Table 1, Table 4, Table 7, and Table 10, respectively. In the following embodiments, the aspherical surface depression z of the aspherical lens 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}, 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 to C are aspherical coefficients, and the aspherical coefficients can be expressed in scientific notation. For example, 2.00E-03 represents 2.00×10 -3 .

[0025] Figure 1 、 5 ​, 9, and 13 are respectively the lens configurations and optical path schematic diagrams of the first, second, third, and fourth embodiments of the wide-angle lens of the present invention. Among them, the first lenses L11, L21, L31, and L41 have negative refractive powers, and their image sides S12, S22, S32, and S42 are concave surfaces, and the object sides S11, S21, S31, and S41 and the image sides S12, S22, S32, and S42 are all spherical surfaces.

[0026] The second lenses L12, L22, L32, and L42 are meniscus lenses with positive refractive powers, their object sides S13, S23, S33, and S43 are convex surfaces, the image sides S14, S24, S34, and S44 are concave surfaces, and the object sides S13, S23, S33, and S43 and the image sides S14, S24, S34, and S44 are all aspherical surfaces.

[0027] The third lenses L13, L23, L33, and L43 have positive refractive powers, their image sides S17, S27, S37, and S47 are convex surfaces, and the object sides S16, S26, S36, and S46 and the image sides S17, S27, S37, and S47 are all spherical surfaces.

[0028] The fourth lenses L14, L24, L34, and L44 are biconvex lenses with positive refractive powers, their object sides S18, S28, S38, and S48 are convex surfaces, the image sides S19, S29, S39, and S49 are convex surfaces, and the object sides S18, S28, S38, and S48 and the image sides S19, S29, S39, and S49 are all aspherical surfaces.

[0029] The fifth lenses L15, L25, L35, and L45 are meniscus lenses with negative refractive powers, their object sides S110, S210, S310, and S410 are concave surfaces, the image sides S111, S211, S311, and S411 are convex surfaces, and the object sides S110, S210, S310, and S410 and the image sides S111, S211, S311, and S411 are all aspherical surfaces.

[0030] In addition, the wide-angle lenses 1, 2, 3, and 4 satisfy at least one of the following conditions (1) to (8):

[0031] -0.5 mm -1 ≤ (TTL / f) / R31 ≤ 1 mm -1 ; (1)

[0032] -20 ≤ (R11 - R31) / f2 ≤ 5.5; (2)

[0033] -1.6 mm ≤ R11 / Vd2 ≤ 1.4 mm; (3)

[0034] 16 ≤ f2-Vd2 ≤ 43; (4)

[0035] 11.09 ≤ f2 / f ≤ 18.52; (5)

[0036] -23.7 ≤ (R51+R52) / T5 ≤ -8.3; (6)

[0037] 16.5 ≤ TTL / T23 ≤ 29.7; (7)

[0038] 42.2 ≤ TTL / T45 ≤ 173.1; (8)

[0039] Wherein, f is the optical axis of the wide-angle lenses 1, 2, 3, and 4 in the first to fourth embodiments; f2 is the optical axis of the second lenses L12, L22, L32, and L42 in the first to fourth embodiments; Vd2 is the Abbe number of the second lenses L12, L22, L32, and L42 in the first to fourth embodiments; R11 is the curvature radius of the object sides S11, S21, S31, and S41 of the first lenses L11, L21, L31, and L41 in the first to fourth embodiments; R31 is the curvature radius of the object sides S16, S26, S36, and S46 of the third lenses L13, L23, L33, and L43 in the first to fourth embodiments; R51 is the curvature radius of the object sides S110, S210, S310, and S410 of the fifth lenses L15, L25, L35, and L45 in the first to fourth embodiments; R52 is the curvature radius of the image sides S111, S211, S311, and S411 of the fifth lenses L15, L25, L35, and L45 in the first to fourth embodiments; T23 is the air spacing between the image sides S14, S24, S34, and S44 of the second lenses L12, L22, L32, and L42 and the object sides S16, S26, S36, and S46 of the third lenses L13, L23, L33, and L43 on the optical axes OA1, OA2, OA3, and OA4 in the first to fourth embodiments; T45 is the air spacing between the image sides S19, S29, S39, and S49 of the fourth lenses L14, L24, L34, and L44 and the object sides S110, S210, S310, and S410 of the fifth lenses L15, L25, L35, and L45 on the optical axes OA1, OA2, OA3, and OA4 in the first to fourth embodiments; T5 is the spacing between the object sides S110, S210, S310, and S410 and the image sides S111, S211, S311, and S411 of the fifth lenses L15, L25, L35, and L45 on the optical axes OA1, OA2, OA3, and OA4 in the first to fourth embodiments; TTL is the spacing between the object sides S11, S21, S31, and S41 of the first lenses L11, L21, L31, and L41 and the imaging surfaces IMA1, IMA2, IMA3, and IMA4 on the optical axes OA1, OA2, OA3, and OA4 in the first to fourth embodiments. This enables the wide-angle lenses 1, 2, 3, and 4 to effectively reduce the total lens length, effectively improve the resolution, and effectively correct the aberration.

[0040] When the condition (1) is satisfied: -0.5mm -1 ≤(TTL / f) / R31≤1mm -1, it can effectively correct field curvature and compensate for the deterioration of imaging quality caused by high-temperature environments. When condition (2) is satisfied: -20 ≤ (R11 - R31) / f2 ≤ 5.5, it can effectively increase the angle of light incident on the photosensitive component, thereby shortening the total lens length and increasing the peripheral image light quantity. When condition (3) is satisfied: -1.6 mm ≤ R11 / Vd2 ≤ 1.4 mm, it can effectively correct off-axis aberration and astigmatism. When condition (4) is satisfied: 16 ≤ f2 - Vd2 ≤ 43, it can effectively correct lateral and longitudinal chromatic aberrations, taking into account manufacturability and shortening the total lens length. When condition (5) is satisfied: 11.09 ≤ f2 / f ≤ 18.52, it can effectively take into account manufacturability and shorten the total lens length. When condition (6) is satisfied: -23.7 ≤ (R51 + R52) / T5 ≤ -8.3, it can effectively take into account manufacturability and shorten the total lens length. When condition (7) is satisfied: 16.5 ≤ TTL / T23 ≤ 29.7, it can effectively take into account manufacturability and shorten the total lens length. When condition (8) is satisfied: 42.2 ≤ TTL / T45 ≤ 173.1, it can effectively take into account manufacturability and shorten the total lens length.

[0041] Now, a first embodiment of the wide-angle lens of the present invention will be described in detail. Please refer to Figure 1 , the wide-angle lens 1 sequentially includes a first lens L11, a second lens L12, an aperture ST1, a third lens L13, a fourth lens L14, and a fifth lens L15 along the optical axis OA1 from an object side to an image side. During imaging, the light from the object side is finally imaged on the imaging surface IMA1. According to the first to seventh paragraphs of the [Detailed Implementation Manner], where: the first lens L11 is a meniscus lens, and its object side surface S11 is a convex surface; the third lens L13 is a meniscus lens, and its object side surface S16 is a concave surface; by using the above lenses, aperture ST1, and a design that satisfies at least one of condition (1) to condition (8), the wide-angle lens 1 can effectively reduce the total lens length, effectively improve the resolution, and effectively correct aberrations. When the wide-angle lens of the present invention only satisfies condition (1), condition (2), and the refractive surface shape characteristics in the independent claims, the basic operation requirements can be achieved.

[0042] Table 1 is Figure 1 a table of relevant parameters of each lens of the medium wide-angle lens 1 in

[0043] Table 1

[0044]

[0045]

[0046] Table 2 is a table of relevant parameters of the aspherical surfaces of the aspherical lenses in Table 1.

[0047] Table 2

[0048]

[0049] Table 3 shows the relevant parameter values of the wide-angle lens 1 of the first embodiment and the calculated values corresponding to the conditions (1) to (8). It can be seen from Table 3 that the wide-angle lens 1 of the first embodiment can meet the requirements of conditions (1) to (8).

[0050] Table 3

[0051]

[0052] In addition, the optical performance of the wide-angle lens 1 of the first embodiment can also meet the requirements. It can be seen that the longitudinal aberration of the wide-angle lens 1 of the first embodiment is between 0 mm and 0.02 mm. It can be seen that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.03 mm and 0.02 mm. It can be seen that the distortion of the wide-angle lens 1 of the first embodiment is between -2% and 0%. Obviously, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 1 of the first embodiment can all be effectively corrected, thereby obtaining better optical performance. Figure 2 It can be seen that the longitudinal aberration of the wide-angle lens 1 of the first embodiment is between 0 mm and 0.02 mm. It can be seen that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.03 mm and 0.02 mm. It can be seen that the distortion of the wide-angle lens 1 of the first embodiment is between -2% and 0%. Obviously, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 1 of the first embodiment can all be effectively corrected, thereby obtaining better optical performance. Figure 3 It can be seen that the field curvature of the wide-angle lens 1 of the first embodiment is between -0.03 mm and 0.02 mm. It can be seen that the distortion of the wide-angle lens 1 of the first embodiment is between -2% and 0%. Obviously, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 1 of the first embodiment can all be effectively corrected, thereby obtaining better optical performance. Figure 4 It can be seen that the distortion of the wide-angle lens 1 of the first embodiment is between -2% and 0%. Obviously, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 1 of the first embodiment can all be effectively corrected, thereby obtaining better optical performance.

[0053] Now, a second embodiment of the wide-angle lens of the present invention will be described in detail. Please refer to Figure 5 , the wide-angle lens 2 sequentially includes a first lens L21, a second lens L22, an aperture ST2, a third lens L23, a fourth lens L24, and a fifth lens L25 along the optical axis OA2 from an object side to an image side. When imaging, the light rays from the object side are finally imaged on the imaging surface IMA2. According to the first to seventh paragraphs of the [Detailed Description of the Invention], where: the first lens L21 is a meniscus lens, and its object side surface S21 is a convex surface; the third lens L23 is a biconvex lens, and its object side surface S26 is a convex surface; by using the above lenses, aperture ST2, and a design that satisfies at least one of the conditions (1) to (8), the wide-angle lens 2 effectively reduces the total lens length, effectively improves the resolution, and effectively corrects the aberration. When the wide-angle lens of the present invention only satisfies the conditions (3), (4), (5), and the refractive surface shape features in the independent claims, the basic actuation requirements can be achieved.

[0054] Table 4 is Figure 5 the relevant parameter table of each lens of the wide-angle lens 2 in

[0055] Table 4

[0056]

[0057] Table 5 is the relevant parameter table of the aspherical surfaces of the aspherical lenses in Table 4.

[0058] Table 5

[0059]

[0060] Table VI shows the relevant parameter values of the wide-angle lens 2 of the second embodiment and the calculated values for the corresponding conditions (1) to (8). From Table VI, it can be seen that the wide-angle lens 2 of the second embodiment can meet the requirements of conditions (1) to (8).

[0061] Table VI

[0062]

[0063] In addition, the optical performance of the wide-angle lens 2 of the second embodiment can also meet the requirements. From Figure 6 it can be seen that the longitudinal aberration of the wide-angle lens 2 of the second embodiment is between 0 mm and 0.03 mm. From Figure 7 it can be seen that the field curvature of the wide-angle lens 2 of the second embodiment is between -0.04 mm and 0.015 mm. From Figure 8 it can be seen that the distortion of the wide-angle lens 2 of the second embodiment is between -4% and 0%. Obviously, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 2 of the second embodiment can all be effectively corrected, thereby obtaining better optical performance.

[0064] Now, a detailed description of the third embodiment of the wide-angle lens of the present invention will be given. Please refer to Figure 9 , the wide-angle lens 3 sequentially includes a first lens L31, a second lens L32, an aperture ST3, a third lens L33, a fourth lens L34, and a fifth lens L35 along the optical axis OA3 from an object side to an image side. When imaging, the light rays from the object side are finally imaged on the imaging surface IMA3. According to the first to seventh paragraphs of the [Specific Embodiments], where: the first lens L31 is a meniscus lens, and its object side surface S31 is a convex surface; the third lens L33 is a meniscus lens, and its object side surface S36 is a concave surface; by using the above lenses, aperture ST3, and a design that satisfies at least one of the conditions (1) to (8), the wide-angle lens 3 effectively reduces the total lens length, effectively improves the resolution, and effectively corrects the aberration. When the wide-angle lens of the present invention only satisfies condition (6) and the refractive surface shape feature in the independent claim, it can meet the requirements of basic operation.

[0065] Table VII is Figure 9 the relevant parameter table of each lens of the wide-angle lens 3 in

[0066] Table VII

[0067]

[0068]

[0069] Table VIII is the relevant parameter table of the aspherical surfaces of the aspherical lenses in Table VII.

[0070] Table VIII

[0071]

[0072] Table IX shows the relevant parameter values of the wide-angle lens 3 of the third embodiment and the calculated values for the corresponding conditions (1) to (8). From Table IX, it can be seen that the wide-angle lens 3 of the third embodiment can meet the requirements of conditions (1) to (8).

[0073] Table IX

[0074]

[0075] 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 Figure 10 that the longitudinal aberration of the wide-angle lens 3 of the third embodiment is between -0.005 mm and 0.025 mm. It can be seen from Figure 11 that the field curvature of the wide-angle lens 3 of the third embodiment is between -0.035 mm and 0.01 mm. It can be seen from Figure 12 that the distortion of the wide-angle lens 3 of the third embodiment is between -1% and 0%. Obviously, the longitudinal aberration, field curvature, and distortion of the wide-angle lens 3 of the third embodiment can all be effectively corrected, thereby obtaining better optical performance.

[0076] Now, a detailed description will be given of the fourth embodiment of the wide-angle lens of the present invention. Please refer to Figure 13 , the wide-angle lens 4 sequentially includes a first lens L41, a second lens L42, an aperture ST4, a third lens L43, a fourth lens L44, and a fifth lens L45 along the optical axis OA4 from an object side to an image side. When imaging, the light rays from the object side are finally imaged on the imaging surface IMA4. According to the first to seventh paragraphs of the [Detailed Description of the Invention], wherein: the first lens L41 is a meniscus lens, and its object side surface S41 is a concave surface; the third lens L43 is a biconvex lens, and its object side surface S46 is a convex surface; by using the above lenses, aperture ST4, and a design that satisfies at least one of the conditions (1) to (8), the wide-angle lens 4 effectively reduces the total lens length, effectively improves the resolution, and effectively corrects the aberration. When the wide-angle lens of the present invention only satisfies conditions (7), (8), and the refractive surface shape characteristics in the independent claims, the basic operation requirements can be achieved.

[0077] Table X is Figure 13 the relevant parameter table of each lens of the wide-angle lens 4 in

[0078] Table X

[0079]

[0080] Table XI is the relevant parameter table of the aspherical surfaces of the aspherical lenses in Table X.

[0081] Table XI

[0082]

[0083] Table XII shows the relevant parameter values of the wide-angle lens 4 of the fourth embodiment and the calculated values for the corresponding conditions (1) to (8). As can be seen from Table XII, the wide-angle lens 4 of the fourth embodiment can meet the requirements of conditions (1) to (8).

[0084] Table XII

[0085]

[0086] Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. Any person skilled in this art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to that defined by the appended claims.

Claims

1. A wide-angle lens, characterized in that, Comprising: The first lens has a refractive power, and the first lens includes a concave surface facing an image side; The second lens has a refractive power; The third lens has a positive refractive power, and the third lens includes a convex surface facing the image side; The fourth lens has a refractive power; and The fifth lens has a negative refractive power, and the fifth lens includes a concave surface facing an object side; Wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in sequence along the optical axis from the object side to the image side; Wherein the wide-angle lens satisfies at least one of the following conditions: 16 ≤ f2 - Vd2 ≤ 43; 11.09 ≤ f2 / f ≤ 18.52; -23.7 ≤ (R51 + R52) / T5 ≤ -8.3; 16.5 ≤ TTL / T23 ≤ 29.7; 42.2 ≤ TTL / T45 ≤ 173.1; Wherein, f is the effective focal length of the wide-angle lens, f2 is the optical axis of the second lens, Vd2 is the Abbe number of the second lens, R51 is the curvature radius of the object side surface of the fifth lens, R52 is the curvature radius of the image side surface of the fifth lens, T23 is the air spacing on the optical axis from the image side surface of the second lens to the object side surface of the third lens, T45 is the air spacing on the optical axis from the image side surface of the fourth lens to the object side surface of the fifth lens, T5 is the spacing on the optical axis from the object side surface of the fifth lens to the image side surface of the fifth lens, and TTL is the spacing on the optical axis from the object side surface of the first lens to the imaging surface.

2. The wide-angle lens according to claim 1, wherein: The first lens has a negative refractive power; The second lens has a positive refractive power; and The fourth lens has a positive refractive power.

3. The wide-angle lens according to claim 2, characterized in that, The second lens is a meniscus lens and includes a convex surface facing the object side and a concave surface facing the image side.

4. The wide-angle lens according to claim 3, wherein The fourth lens is a biconvex lens and includes a convex surface facing the object side and another convex surface facing the image side.

5. The wide-angle lens according to claim 4, wherein The first lens is a meniscus lens and further includes a convex surface facing the object side.

6. The wide-angle lens according to claim 5, wherein The third lens is a meniscus lens and further includes a concave surface facing the object side; and The fifth lens is a meniscus lens and further includes a convex surface facing the image side.

7. The wide-angle lens according to claim 5, wherein The third lens is a biconvex lens and further includes another convex surface facing the object side; and The fifth lens is a meniscus lens and further includes a convex surface facing the image side.

8. The wide-angle lens according to claim 4, wherein: The first lens is a biconcave lens and further includes another concave surface facing the object side; The third lens is a biconvex lens and further includes another convex surface facing the object side; and The fifth lens is a meniscus lens and further includes a convex surface facing the image side.

9. The wide-angle lens according to claim 1, characterized in that Further includes a diaphragm disposed between the second lens and the third lens.

10. The wide-angle lens according to any one of claims 1 to 9, characterized in that, The wide-angle lens satisfies at least one of the following conditions: -0.5 mm -1 ≤ (TTL / f) / R31 ≤ 1 mm -1 ; -20 ≤ (R11 - R31) / f2 ≤ 5.5; -1.6 mm ≤ R11 / Vd2 ≤ 1.4 mm; Wherein, f is the effective focal length of the wide-angle lens, f2 is the effective focal length of the second lens, Vd2 is the Abbe number of the second lens, R11 is the curvature radius of the object side of the first lens, R31 is the curvature radius of the object side of the third lens, and TTL is the distance between the object side of the first lens and the imaging surface on the optical axis.

Images