An optical lens group for automotive lenses

Abstract

The present invention provides an optical lens group for a vehicle-mounted lens, which includes six lenses. From the object side to the image side, they are successively: a first lens with a negative optical power, a second lens with a negative optical power, a third lens with a positive optical power, an aperture, a fourth lens with a positive optical power, a fifth lens with a positive optical power, and a sixth lens with a positive optical power. The optical lens group satisfies the following conditional expressions: -0.3 < f6 / TTL < 0.9; where f6 is the focal length of the sixth lens, and TTL is the total lens length of the optical lens group; 24 < TTL / AT56 < 115; where AT56 is the spatial interval between the fifth lens and the sixth lens; 3 < f6 / EFL < 9.1; where EFL is the effective focal length of the optical lens group. The front and rear lens distances can be adjusted to improve the imaging quality.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and particularly relates to an optical lens group for a vehicle-mounted lens. Background Art

[0002] A vehicle lens is an optical lens specifically applied to the automotive field. The vehicle lens provides clear image capture capabilities for various vision systems in the vehicle. For example, the vehicle lens in the reverse image system can accurately image the scene behind the vehicle, allowing the driver to clearly see whether there are obstacles or other situations behind; the lens used in the driving recorder can record the road conditions, traffic signs, and emergencies in front during driving, providing video evidence for accident determination, etc. According to the optical characteristics of the vehicle lens, it can be divided into wide-angle lenses and telephoto lenses. With the development of technology, the pixel of the vehicle lens is continuously increasing and developing towards ultra-high definition. Higher pixels can provide clearer and more delicate graphics, which helps to improve the accuracy and reliability of the vehicle vision system. In view of this situation, how to continuously improve the imaging quality is an urgent problem for engineers in the industry to solve. Summary of the Invention

[0003] In view of the above problems, the present invention provides an optical lens group for a vehicle-mounted lens, which can adjust the distance between the front and rear lenses and improve the imaging quality.

[0004] To achieve the above object, the present invention is solved by the following technical solutions: An optical lens group for a vehicle-mounted lens includes six lenses, which sequentially include from the object side to the image side: a first lens with a negative optical power, a second lens with a negative optical power, a third lens with a positive optical power, an aperture, a fourth lens with a positive optical power, a fifth lens with a positive optical power, and a sixth lens with a positive optical power;

[0005] The optical lens group satisfies the following conditional expressions:

[0006] 0 < f6 / TTL < 0.9; where f6 is the focal length of the sixth lens, and TTL is the total lens length of the optical lens group;

[0007] 24 < TTL / AT56 < 11; where AT56 is the spatial interval between the fifth lens and the sixth lens;

[0008] 3 < f6 / EFL < 9.1; where EFL is the effective focal length of the optical lens group.

[0009] Another solution provided by the present invention is an optical lens group for a vehicle-mounted lens, which includes six lenses, and they sequentially include from the object side to the image side:

[0010] A first lens with a negative focal power, a second lens with a negative focal power, a third lens with a positive focal power, an aperture, a fourth lens with a positive focal power, a fifth lens with a positive focal power, a sixth lens with a positive focal power;

[0011] The optical lens group satisfies the following conditional expressions:

[0012] 0.07 < (C3 - C4) / AT34 < 4.6; where C3 is the thickness of the third lens, C4 is the thickness of the fourth lens, and AT34 is the spatial interval between the third lens and the fourth lens;

[0013] 24 < TTL / AT56 < 115; where TTL is the total lens length of the optical lens group, and AT56 is the spatial interval between the fifth lens and the sixth lens;

[0014] 1.7 < Imgh / EFL < 2.1; where Imgh is the maximum image height of the imaging height of the optical lens group, and EFL is the effective focal length of the optical lens group.

[0015] Preferably, the object side near the optical axis of the first lens is a convex surface, and the image side near the optical axis of the first lens is a concave surface; the object side near the optical axis of the second lens is a convex surface, and the image side near the optical axis of the second lens is a concave surface; the object side near the optical axis of the third lens is a convex surface, and the image side near the optical axis of the third lens is a concave surface; the object side near the optical axis of the fourth lens is a flat surface, and the image side near the optical axis of the fourth lens is a convex surface; the object side near the optical axis of the fifth lens is a convex surface, and the image side near the optical axis of the fifth lens is a convex surface; the object side near the optical axis of the sixth lens is a concave surface, and the image side near the optical axis of the sixth lens is a convex surface.

[0016] Preferably, the object side near the optical axis of the first lens is a convex surface, and the image side near the optical axis of the first lens is a concave surface; the object side near the optical axis of the second lens is a convex surface, and the image side near the optical axis of the second lens is a concave surface; the object side near the optical axis of the third lens is a convex surface, and the image side near the optical axis of the third lens is a convex surface; the object side near the optical axis of the fourth lens is a flat surface, and the image side near the optical axis of the fourth lens is a convex surface; the object side near the optical axis of the fifth lens is a convex surface, and the image side near the optical axis of the fifth lens is a convex surface; the object side near the optical axis of the sixth lens is a concave surface, and the image side near the optical axis of the sixth lens is a convex surface.

[0017] Preferably, the optical lens group satisfies the following condition: 9 < AT34 / AT45 < 32; where AT34 is the spatial interval between the third lens and the fourth lens, and AT45 is the spatial interval between the fourth lens and the fifth lens.

[0018] Preferably, the optical lens group satisfies the following conditions: 12 < Vd4 / Nd4 < 35; where Vd4 is the dispersion coefficient of the fourth lens and Nd4 is the refractive index of the fourth lens.

[0019] Preferably, the optical lens group satisfies the following conditions: -3.1 < f2 / EFL < -1.2; where f2 is the focal length of the second lens.

[0020] Preferably, the optical lens group satisfies the following conditions:

[0021] -17 < R1 / f1 < -3; where R1 is the curvature radius of the object side of the first lens and f1 is the focal length of the first lens.

[0022] 0.3 < R5 / f3 < 1.3; where R5 is the curvature radius of the object side of the third lens and f3 is the focal length of the third lens.

[0023] 2.1 < R9 / f5 < 4.1; where R9 is the curvature radius of the object side of the fifth lens and f5 is the focal length of the fifth lens.

[0024] Preferably, the optical lens group satisfies the following conditions:

[0025] -16 < (R1 - R2) / f1 < -2.5; where R1 is the curvature radius of the object side of the first lens, R2 is the curvature radius of the image side of the first lens, and f1 is the focal length of the first lens;

[0026] -0.18 < (R5 - R6) / f3 < 2.6; where R5 is the curvature radius of the object side of the third lens, R6 is the curvature radius of the image side of the third lens, and f3 is the focal length of the third lens; <着名的 [[ID=着名的

[0027] 2.7 < (R9 - R10) / f5 < 4.7; where R9 is the curvature radius of the object side of the fifth lens, R10 is the curvature radius of the image side of the fifth lens, and f5 is the focal length of the fifth lens;

[0028] Preferably, the optical lens group satisfies the following conditions:

[0029] 1.1 < (C1 + C2) / AT12 < 5; where C1 is the thickness of the first lens, C2 is the thickness of the second lens, and AT12 is the air gap between the first lens and the second lens;

[0030] 6 < (C5 + C6) / AT56 < 41; where C5 is the thickness of the fifth lens, C6 is the thickness of the sixth lens, and AT56 is the air gap between the fifth lens and the sixth lens;

[0031] 9 < TTL / AT12 < 39; where, AT12 is the air gap between the first lens and the second lens;

[0032] 4 < TTL / CT6 < 6.3; where, CT6 is the thickness of the sixth lens.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1. Satisfy the conditional formula 0 < f6 / TTL < 0.9, which can adjust the focal length and control the system size;

[0035] 2. Satisfy the conditional formula 24 < TTL / AT56 < 115, which can correct the spherical chromatic aberration;

[0036] 3. Satisfy the conditional formula 3 < f6 / EFL < 9.1, which helps to control the focal length of the sixth lens and the effective focal length of the overall optical imaging lens group, and maintain a certain ratio between the two;

[0037] 4. Satisfy the conditional formula 0.07 < (C3 - C4) / AT34 < 4.6, which makes the distance distribution between the lenses more appropriate, and is conducive to correcting the aberration of the optical lens group to improve the imaging quality;

[0038] 5. Satisfy the conditional formula 1.7 < Imgh / EFL < 2.1, which helps to maintain a certain appropriate value for the system focal length and various optical parameters, avoid any parameter being too large and unfavorable for correcting the overall aberration of the optical lens group, or avoid any parameter being too small and affecting the assembly or increasing the manufacturing difficulty;

[0039] 6. Satisfy the conditional formula 9 < AT34 / AT45 < 32, which can adjust the distance between the front and rear groups and improve the imaging quality;

[0040] 7. Satisfy the conditional formula 12 < Vd4 / Nd4 < 35, which can make the material selection more flexible and also make the achromatic aberration performance better;

[0041] 8. Satisfy the conditional formula -3.1 < f2 / EFL < -1.2, which can make the second lens have an appropriate negative refractive power; if f2 / EFL is lower than the lower limit value of the relational formula, the refractive power of the second lens is too low, which is likely to shorten the back focal length of the optical lens group; if f2 / EFL is higher than the upper limit value of the relational formula, the refractive power of the third lens is too high, which is not conducive to evenly distributing the negative refractive power at the front end of the optical lens group;

[0042] 9. Satisfy the conditional formula -17 < R1 / f1 < -3, which is beneficial to adjusting the light-gathering ability and increasing the field angle;

[0043] 10. Satisfy the conditional formula 0.3 < R5 / f3 < 1.3, which is beneficial to correcting the low-order aberration;

[0044] 11. Meeting the conditional expression 2.1 < R9 / f5 < 4.1 helps to correct higher-order aberrations and astigmatism;

[0045] 12. Meeting the conditional expression -16 < (R1 - R2) / f1 < -2.5 can control the lens surface shape of the first lens and helps to correct imaging aberrations;

[0046] 13. Meeting the conditional expression -0.18 < (R5 - R6) / f3 < 2.6 can control the lens surface shape of the third lens and helps to correct imaging aberrations;

[0047] 14. Meeting the conditional expression 2.7 < (R9 - R10) / f5 < 4.7 can control the lens surface shape of the fifth lens and helps to correct imaging aberrations;

[0048] 15. Meeting the conditional expressions 1.1 < (C1 + C2) / AT12 < 5 and 6 < (C5 + C6) / AT56 < 41 makes the spacing distribution between lenses more appropriate, which is beneficial to correcting the aberrations of the optical lens group and improving the imaging quality of the optical lens group;

[0049] 16. Meeting the conditional expression 9 < TTL / AT12 < 39 can control the spacing between the first lens and the second lens, which is beneficial to the miniaturization of the optical lens group;

[0050] 17. Meeting the conditional expression 4 < TTL / CT6 < 6.3. By controlling the ratio relationship between the central thickness and the total length of the sixth lens, increasing the thickness of the sixth lens can share the optical power of the first lens, which is beneficial to compressing the head aperture and making the overall structure of the optical lens group more compact. When exceeding the upper limit of the relational expression, the central thickness of the sixth lens is too small, which is not conducive to the aperture compression of the first lens and is not conducive to the assembly of the optical lens. Description of the Drawings

[0051] Figure 1 It is a schematic structural diagram of the optical lens group of Example 1.

[0052] Figure 2 It is a spherical aberration diagram of the optical lens group of Example 1.

[0053] Figure 3 It is a field curvature diagram of the optical lens group of Example 1.

[0054] Figure 4 It is a distortion diagram of the optical lens group of Example 1.

[0055] Figure 5 It is the longitudinal chromatic aberration of the optical lens group of Example 1.

[0056] Figure 6 It is a schematic structural diagram of the optical lens group of Example 2.

[0057] Figure 7 Spherical aberration diagram of the optical lens group in Example 2.

[0058] Figure 8 This is a field curve diagram of the optical lens group in Example 2.

[0059] Figure 9 This is a distortion diagram of the optical lens group in Example 2.

[0060] Figure 10 This refers to the longitudinal chromatic aberration of the optical lens group in Example 2.

[0061] Figure 11 This is a schematic diagram of the optical lens assembly in Example 3.

[0062] Figure 12 This is a spherical aberration diagram of the optical lens group in Example 3.

[0063] Figure 13 This is a field curve diagram of the optical lens group in Example 3.

[0064] Figure 14 This is a distortion diagram of the optical lens group in Example 3.

[0065] Figure 15 This refers to the longitudinal chromatic aberration of the optical lens group in Example 3.

[0066] The attached figures are labeled as follows: first lens 11, second lens 12, third lens 13, fourth lens 14, fifth lens 15, sixth lens 16, electronic photosensitive element 18, filter element 17, and aperture 10. Detailed Implementation

[0067] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0068] This invention discloses a solution achieved through the following technical method: an optical lens assembly for a vehicle-mounted lens, comprising six lenses, which, from the object side to the image side, sequentially include:

[0069] The system includes a first lens 11 with negative optical power, a second lens 12 with negative optical power, a third lens 13 with positive optical power, an aperture 10, a fourth lens 14 with positive optical power, a fifth lens 15 with positive optical power, and a sixth lens 16 with positive optical power. Between the sixth lens 16 and the image-side surface, a filter element 17 that does not affect the focal length and an electronic photosensitive element 18 are sequentially arranged, with the electronic photosensitive element 18 disposed on the image-side surface.

[0070] The optical lens group satisfies the following condition:

[0071] 0 < f6 / TTL < 0.9; where f6 is the focal length of the sixth lens 16 and TTL is the total lens length of the optical lens group; meeting this conditional formula allows for adjustable focal length and control of the system size;

[0072] 24 < TTL / AT56 < 115; where AT56 is the space between the fifth lens 15 and the sixth lens 16; meeting this conditional formula allows for correction of spherical chromatic aberration;

[0073] 3 < f6 / EFL < 9.1; where EFL is the effective focal length of the optical lens group; meeting this conditional formula helps to control the ratio between the focal length of the sixth lens and the effective focal length of the overall optical imaging lens group;

[0074] Another solution provided by the present invention is an optical lens group for a vehicle-mounted lens, including six lenses, which sequentially include from the object side to the image side:

[0075] A first lens 11 with negative optical power, a second lens 12 with negative optical power, a third lens 13 with positive optical power, an aperture 10, a fourth lens 14 with positive optical power, a fifth lens 15 with positive optical power, and a sixth lens 16 with positive optical power; between the sixth lens 16 and the image side, a filter element 17 that does not affect the focal length and an electronic photosensitive element 18 are sequentially arranged, and the electronic photosensitive element 18 is arranged on the image side;

[0076] The optical lens group meets the following conditional formula:

[0077] 0.07 < (C3 - C4) / AT34 < 4.6; where C3 is the thickness of the third lens 13, C4 is the thickness of the fourth lens 14, and AT34 is the space between the third lens 13 and the fourth lens 14; meeting this conditional formula allows for a more appropriate distance distribution between the lenses, which is beneficial for correcting the aberration of the optical lens group to improve imaging quality;

[0078] 24 < TTL / AT56 < 115; where TTL is the total lens length of the optical lens group and AT56 is the space between the fifth lens 15 and the sixth lens 16; meeting this conditional formula allows for adjustment of the front and rear group distances and improvement of imaging quality;

[0079] 1.7 < Imgh / EFL < 2.1; where Imgh is the maximum image height of the imaging height of the optical lens group and EFL is the effective focal length of the optical lens group. Meeting this conditional formula helps to maintain a certain appropriate value for the system focal length and optical parameters, avoiding any parameter being too large and不利于 correcting the aberration of the overall optical lens group, or avoiding any parameter being too small and affecting assembly or increasing manufacturing difficulties.

[0080] Preferably, the object side near the optical axis of the first lens 11 is convex, and the image side near the optical axis of the first lens is concave; the object side near the optical axis of the second lens 12 is convex, and the image side near the optical axis of the second lens 12 is concave; the object side near the optical axis of the third lens 13 is convex, and the image side near the optical axis of the third lens 13 is convex; the object side near the optical axis of the fourth lens 14 is flat, and the image side near the optical axis of the fourth lens 14 is convex; the object side near the optical axis of the fifth lens 15 is convex, and the image side near the optical axis of the fifth lens 15 is convex; the object side near the optical axis of the sixth lens 16 is concave, and the image side near the optical axis of the sixth lens 16 is convex.

[0081] Preferably, the object side near the optical axis of the first lens 11 is convex, and the image side near the optical axis of the first lens is concave; the object side near the optical axis of the second lens 12 is convex, and the image side near the optical axis of the second lens 12 is concave; the object side near the optical axis of the third lens 13 is convex, and the image side near the optical axis of the third lens 13 is convex; the object side near the optical axis of the fourth lens 14 is flat, and the image side near the optical axis of the fourth lens 14 is convex; the object side near the optical axis of the fifth lens 15 is convex, and the image side near the optical axis of the fifth lens 15 is convex; the object side near the optical axis of the sixth lens 16 is concave, and the image side near the optical axis of the sixth lens 16 is convex.

[0082] Preferably, the optical lens group satisfies the following condition: 9 < AT34 / AT45 < 32; where AT34 is the spatial interval between the third lens 13 and the fourth lens 14, and AT45 is the spatial interval between the fourth lens 14 and the fifth lens 15. Meeting this conditional formula can adjust the front and rear group distances and improve the imaging quality.

[0083] Preferably, the optical lens group satisfies the following condition: 12 < Vd4 / Nd4 < 35; where Vd4 is the dispersion coefficient of the fourth lens 14 and Nd4 is the refractive index of the fourth lens 14. Meeting this conditional formula can make the material selection more flexible and also result in better achromatic aberration performance.

[0084] Preferably, the optical lens group satisfies the following condition: -3.1 < f2 / EFL < -1.2; where f2 is the focal length of the second lens 12.

[0085] Preferably, the optical lens group satisfies the following condition: Meeting this conditional formula can endow the second lens with appropriate negative refractive power; if fz / EFL is lower than the lower limit of the relational expression, the refractive power of the second lens is too low, which is likely to shorten the back focal length of the optical lens group; if fz / EFL is higher than the upper limit of the relational expression, the refractive power of the third lens is too high, which is not conducive to evenly distributing the negative refractive power at the front end of the optical lens group.

[0086] -17 < R1 / f1 < -3; where, R1 is the curvature radius on the object side of the first lens 11, and f1 is the focal length of the first lens 11. Meeting this conditional formula is conducive to adjusting the light-gathering ability and increasing the field angle.

[0087] 0.3 < R5 / f3 < 1.3; where, R5 is the curvature radius on the object side of the third lens 13, and f3 is the focal length of the third lens 13. Meeting this conditional formula is conducive to correcting low-order aberrations.

[0088] 2.1 < R9 / f5 < 4.1; where, R9 is the curvature radius on the object side of the fifth lens 15, and f5 is the focal length of the fifth lens 15. Meeting this conditional formula helps to correct high-order aberrations and astigmatism.

[0089] Preferably, the optical lens group satisfies the following conditions:

[0090] -16 < (R1 - R2) / f1 < -2.5; where, R1 is the curvature radius on the object side of the first lens 11, R2 is the curvature radius on the image side of the first lens 11, and f1 is the focal length of the first lens 11; Meeting this conditional formula can control the lens surface shape of the first lens and helps to correct imaging aberrations.

[0091] -0.18 < (R5 - R6) / f3 < 2.6; where, R5 is the curvature radius on the object side of the third lens 13, R6 is the curvature radius on the image side of the third lens 13, and f3 is the focal length of the third lens 13; Meeting this conditional formula can control the lens surface shape of the third lens and helps to correct imaging aberrations.

[0092] 2.7 < (R9 - R10) / f5 < 4.7; where, R9 is the curvature radius on the object side of the fifth lens 15, R10 is the curvature radius on the image side of the fifth lens 15, and f5 is the focal length of the fifth lens 15; Meeting this conditional formula can control the lens surface shape of the fifth lens and helps to correct imaging aberrations.

[0093] Preferably, the optical lens group satisfies the following conditions:

[0094] 1.1 < (C1 + C2) / AT12 < 5; where, C1 is the thickness of the first lens 11, C2 is the thickness of the second lens 12, and AT12 is the air gap between the first lens 11 and the second lens 12.

[0095] 6 < (C5 + C6) / AT56 < 41; where, C5 is the thickness of the fifth lens 15, C6 is the thickness of the sixth lens, and AT56 is the air gap between the fifth lens and the sixth lens 16.

[0096] Meeting these two conditional formulas makes the lens spacing distribution more appropriate, which is conducive to correcting the aberrations of the optical lens group to improve the imaging quality of the optical lens group.

[0097] 9 < TTL / AT12 < 39; where AT12 is the air gap between the first lens 11 and the second lens 12. Meeting this conditional expression can control the distance between the first lens and the second lens, which is beneficial to the miniaturization of the optical lens group.

[0098] 4 < TTL / CT6 < 6.3; where CT6 is the thickness of the sixth lens 16. Meeting this conditional expression, by controlling the ratio relationship between the central thickness of the sixth lens and the total length, increasing the thickness of the sixth lens can share the optical power of the first lens, which is beneficial to compressing the head aperture and making the overall structure of the optical lens group more compact. When exceeding the upper limit of the relational expression, the central thickness of the sixth lens is too small, which is not conducive to the aperture compression of the first lens and is not conducive to the assembly of the optical lens.

[0099] Example 1, as Figure 1-5 shown, the first lens 11 and the fourth lens 14 are made of glass materials, and the second lens 12, the third lens 13, the fifth lens 15, and the sixth lens 16 are all made of plastic materials; where the image side near the optical axis of the third lens 13 is a concave surface. An optical lens group for a six-piece vehicle-mounted lens provided in this example, the relevant parameters of each lens are shown in Table 1-1, and the aspherical parameters of each lens in this example are shown in Table 1-2.

[0100] Table 1-1

[0101]

[0102]

[0103] Table 1-2

[0104] 12a 12b 13a 13b 15a 15b 16a 16b K -7.15E-01 -1.41E+00 -2.19E-01 1.11E+00 -1.26E+01 -9.39E-01 -1.28E+00 -1.68E+00 A4 -4.64E-03 -1.78E-03 3.69E-03 3.85E-02 9.39E-03 2.54E-02 2.69E-02 3.59E-02 A6 -1.68E-03 1.35E-02 7.85E-03 -7.07E-03 -1.73E-03 -1.84E-03 -5.16E-03 -3.18E-03 A8 2.70E-04 -4.62E-03 -2.08E-03 5.47E-03 1.29E-04 -3.21E-04 -1.25E-04 7.42E-05 A10 -1.24E-05 4.64E-04 1.10E-04 -2.53E-03 -9.04E-05 -4.09E-05 8.15E-05 2.78E-06 A12 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A14 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0105] The aspherical curve equations of the above lenses are expressed as follows:

[0106]

[0107] where X: the distance between the point on the aspherical surface at a distance Y from the optical axis and the tangent plane of the aspherical surface and the optical axis; Y: the perpendicular distance between the point on the aspherical surface and the optical axis;

[0108] R: the radius of curvature of the lens at the near optical axis;

[0109] K: conic coefficient;

[0110] A i : the i-th order aspherical coefficient.

[0111] Example 2, as Figure 6-10As shown, the first lens 11 and the fourth lens 14 are made of glass, while the second lens 12, the third lens 13, the fifth lens 15, and the sixth lens 16 are all made of plastic. The third lens 13 has a convex surface near the optical axis on its image side. This embodiment provides a six-element optical lens group for automotive lenses. The relevant parameters of each lens are shown in Table 2-1, and the parameters of the aspherical surfaces of each lens in this embodiment are shown in Table 2-2.

[0112] Table 2-1

[0113]

[0114] Table 2-2

[0115] 22a 22b 23a 23b 25a 25b 26a 26b K 4.40E-02 -1.60E+00 8.06E-01 1.81E+01 4.48E+01 -1.38E+00 -2.27E+00 -1.99E+00 A4 -5.06E-03 -4.24E-03 2.08E-04 1.96E-02 -2.13E-02 3.98E-02 3.13E-02 4.31E-02 A6 -1.81E-03 1.24E-02 8.30E-03 3.53E-03 2.06E-03 -1.13E-02 -1.32E-02 -4.46E-03 A8 2.50E-04 -3.95E-03 -2.60E-03 -3.03E-03 1.90E-04 -2.16E-03 5.34E-04 -1.36E-04 A10 -1.08E-05 3.33E-04 2.08E-04 1.04E-03 -1.84E-04 4.63E-04 -7.47E-04 2.31E-05 A12 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A14 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0116] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0117]

[0118] Where X: the distance between the point on the aspherical surface that is Y away from the optical axis and the tangent plane between the aspherical surface and the optical axis;

[0119] Y: The perpendicular distance between a point on the aspherical surface and the optical axis;

[0120] R: Radius of curvature of the lens near the optical axis;

[0121] K: Conical coefficient;

[0122] A i : The i-th order aspherical coefficient.

[0123] Example 3, as Figure 11-15 As shown, the first lens 11 and the fourth lens 14 are made of glass, while the second lens 12, the third lens 13, the fifth lens 15, and the sixth lens 16 are all made of plastic. The third lens 13 has a convex surface near the optical axis on its image side. This embodiment provides a six-element optical lens group for automotive lenses. The relevant parameters of each lens are shown in Table 3-1, and the parameters of the aspherical surfaces of each lens in this embodiment are shown in Table 3-2.

[0124] Table 3-1

[0125]

[0126] Table 3-2

[0127] 32a 32b 33a 33b 35a 35b 36a 36b K -7.86E-02 -1.86E+00 -1.38E+01 -2.35E+00 3.94E+01 -9.76E-01 -2.26E+00 -2.28E+00 A4 -5.05E-03 -2.68E-03 -3.40E-03 2.46E-02 -3.62E-03 3.40E-02 3.34E-02 4.40E-02 A6 -1.79E-03 1.29E-02 7.01E-03 -2.00E-02 1.11E-03 -7.95E-03 -1.60E-02 -4.39E-03 A8 2.62E-04 -4.10E-03 -2.83E-03 2.71E-02 -3.74E-04 -1.30E-03 3.85E-04 -1.20E-04 A10 -9.25E-06 2.31E-04 2.42E-04 -1.03E-02 8.44E-05 3.52E-04 -2.42E-05 3.63E-05 A12 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A14 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0128] The equations for the aspherical surfaces of the above lenses are expressed as follows:

[0129]

[0130] Where X: the distance between the point on the aspherical surface that is Y away from the optical axis and the tangent plane between the aspherical surface and the optical axis;

[0131] Y: The perpendicular distance between a point on the aspherical surface and the optical axis;

[0132] R: Radius of curvature of the lens near the optical axis;

[0133] K: Conical coefficient;

[0134] A i : The i-th order aspherical coefficient.

[0135] The above embodiments illustrate only three implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An optical lens assembly for a vehicle-mounted camera, characterized in that, It consists of six lenses, which successively include from the object side to the image side: The first lens (11) with negative focal power, the second lens (12) with negative focal power, the third lens (13) with positive focal power, the aperture (10), the fourth lens (14) with positive focal power, the fifth lens (15) with positive focal power, and the sixth lens (16) with positive focal power; The optical lens group satisfies the following conditional expressions: 0.37 < f6 / TTL < 0.9; where f6 is the focal length of the sixth lens (16), and TTL is the total lens length of the optical lens group; 24 < TTL / AT56 < 115; where AT56 is the space interval between the fifth lens (15) and the sixth lens (16); 3 < f6 / EFL < 9.1; where EFL is the effective focal length of the optical lens group; 1.1 < (C1 + C2) / AT12 < 5; where C1 is the thickness of the first lens (11), C2 is the thickness of the second lens (12), and AT12 is the air interval between the first lens (11) and the second lens (12); 6 < (C5 + C6) / AT56 < 41; where C 5 is the thickness of the fifth lens (15), C6 is the thickness of the sixth lens (16), and AT56 is the air interval between the fifth lens (15) and the sixth lens (16); 9 < TTL / AT12 < 39; where AT12 is the air interval between the first lens (11) and the second lens (12); 2. An optical lens assembly for a vehicle-mounted lens, characterized in that, 4 < TTL / CT6 < 6.3; where CT6 is the thickness of the sixth lens (16). It consists of six lenses, which successively include from the object side to the image side: The first lens (11) with negative focal power, the second lens (12) with negative focal power, the third lens (13) with positive focal power, the aperture (10), the fourth lens (14) with positive focal power, the fifth lens (15) with positive focal power, and the sixth lens (16) with positive focal power; The optical lens group satisfies the following conditional expressions: 0.07 < (C3 - C4) / AT34 < 4.6; where C3 is the thickness of the third lens (13), C4 is the thickness of the fourth lens (14), and AT34 is the space interval between the third lens (13) and the fourth lens (14); 24 < TTL / AT56 < 115; where TTL is the total lens length of the optical lens group, and AT56 is the space interval between the fifth lens (15) and the sixth lens (16); 1.7 < Imgh / EFL < 2.1; where Imgh is the maximum image height of the imaging height of the optical lens group, and EFL is the effective focal length of the optical lens group; 1.1 < (C1 + C2) / AT12 < 5; where C1 is the thickness of the first lens (11), C2 is the thickness of the second lens (12), and AT12 is the air interval between the first lens (11) and the second lens (12); 6 < (C5 + C6) / AT56 < 41; where, C5 is the thickness of the fifth lens (15), C6 is the thickness of the sixth lens (16), and AT56 is the air gap between the fifth lens (15) and the sixth lens (16); 9 < TTL / AT12 < 39; where, AT12 is the air gap between the first lens (11) and the second lens (12); 4 < TTL / CT6 < 6.3; where, CT6 is the thickness of the sixth lens (16).

3. An optical lens assembly for a vehicle-mounted lens according to claim 1 or 2, characterized in that, The object side near the optical axis of the first lens (11) is convex, and the image side near the optical axis of the first lens is concave; the object side near the optical axis of the second lens (12) is convex, and the image side near the optical axis of the second lens (12) is concave; the object side near the optical axis of the third lens (13) is convex, and the image side near the optical axis of the third lens (13) is concave; the object side near the optical axis of the fourth lens (14) is flat, and the image side near the optical axis of the fourth lens (14) is convex; the object side near the optical axis of the fifth lens (15) is convex, and the image side near the optical axis of the fifth lens (15) is convex; the object side near the optical axis of the sixth lens (16) is concave, and the image side near the optical axis of the sixth lens (16) is convex.

4. An optical lens assembly for a vehicle-mounted lens according to claim 1 or 2, characterized in that, The object side near the optical axis of the first lens (11) is convex, and the image side near the optical axis of the first lens is concave; the object side near the optical axis of the second lens (12) is convex, and the image side near the optical axis of the second lens (12) is concave; the object side near the optical axis of the third lens (13) is convex, and the image side near the optical axis of the third lens (13) is convex; the object side near the optical axis of the fourth lens (14) is flat, and the image side near the optical axis of the fourth lens (14) is convex; the object side near the optical axis of the fifth lens (15) is convex, and the image side near the optical axis of the fifth lens (15) is convex; the object side near the optical axis of the sixth lens (16) is concave, and the image side near the optical axis of the sixth lens (16) is convex.

5. An optical lens assembly for a vehicle-mounted lens according to claim 1 or 2, characterized in that, The optical lens group satisfies the following condition: 9 < AT34 / AT45 < 32; where, AT34 is the space between the third lens (13) and the fourth lens (14), and AT45 is the space between the fourth lens (14) and the fifth lens (15).

6. An optical lens assembly for a vehicle-mounted lens according to claim 1 or 2, characterized in that, The optical lens group satisfies the following condition: 12 < Vd4 / Nd4 < 35; where, Vd4 is the dispersion coefficient of the fourth lens (14), and Nd4 is the refractive index of the fourth lens (14).

7. An optical lens assembly for a vehicle-mounted lens according to claim 1 or 2, characterized in that, The optical lens group satisfies the following condition: -3.1 < f2 / EFL < -1.2; where, f2 is the focal length of the second lens (12).

8. An optical lens assembly for a vehicle-mounted lens according to claim 1 or 2, characterized in that, The optical lens group satisfies the following conditions: -17 < R1 / f1 < -3; where, R1 is the curvature radius of the object side of the first lens (11), and f1 is the focal length of the first lens (11); 0.3 < R5 / f3 < 1.3; where, R5 is the radius of curvature of the object side of the third lens (13), and f3 is the focal length of the third lens (13); 2.1 < R9 / f5 < 4.1; where, R9 is the radius of curvature of the object side of the fifth lens (15), and f5 is the focal length of the fifth lens (15).

9. An optical lens assembly for a vehicle-mounted lens according to claim 1 or 2, characterized in that, The optical lens group satisfies the following conditions: -16 < (R1 - R2) / f1 < -2.5; where, R1 is the radius of curvature of the object side of the first lens (11), R2 is the radius of curvature of the image side of the first lens (11), and f1 is the focal length of the first lens (11); -0.18 < (R5 - R6) / f3 < 2.6; where, R5 is the radius of curvature of the object side of the third lens (13), R6 is the radius of curvature of the image side of the third lens (13), and f3 is the focal length of the third lens (13); 2.7 < (R9 - R10) / f5 < 4.7; where, R9 is the radius of curvature of the object side of the fifth lens (15), R10 is the radius of curvature of the image side of the fifth lens (15), and f5 is the focal length of the fifth lens (15).

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