Optical lens group for vehicle-mounted lens

Abstract

The invention provides an optical lens group for a vehicle-mounted lens, which comprises six lenses, the zoom lens sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, an aperture, a fourth lens with positive focal power, a fifth lens with positive focal power and a sixth lens with positive focal power from an object side to an image side, the optical lens group satisfies the following conditional expressions:-0.3 lt; f6 / TTLlt; 0.9, 0.9; wherein f6 is the focal length of the sixth lens, and TTL is the total lens length of the optical lens group; 24 lt; tTL / AT 56lt; 115; 115; wherein AT56 is the space interval between the fifth lens and the sixth lens; 3lt; f6 / EFLlt; 9.1, 9.1; wherein the EFL is the effective focal length of the optical lens group. The distance between front and rear lenses can be adjusted and the imaging quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical lenses, and particularly 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 for the dash cam can record the road conditions, traffic signs, and emergencies in front during driving, providing video evidence for accident determination and so on. According to the optical characteristics of the vehicle lens, it can be divided into a wide-angle lens and a telephoto lens. With the development of technology, the pixel of the vehicle lens is continuously improved and develops 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] -0.3 < 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;

[0007] 24 < TTL / AT56 < 115; 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 negative optical power, a second lens with negative optical power, a third lens with positive optical power, an aperture, a fourth lens with positive optical power, a fifth lens with positive optical power, a sixth lens with positive optical 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 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 is convex, and the image side near the optical axis of the second lens is concave; the object side near the optical axis of the third lens is convex, and the image side near the optical axis of the third lens is concave; the object side near the optical axis of the fourth lens is flat, and the image side near the optical axis of the fourth lens is convex; the object side near the optical axis of the fifth lens is convex, and the image side near the optical axis of the fifth lens is convex; the object side near the optical axis of the sixth lens is concave, and the image side near the optical axis of the sixth lens is convex.

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

[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 condition: 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 condition: -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 condition:

[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 condition:

[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;

[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 condition:

[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:

[0034] 1. Satisfy the conditional formula -0.3 < 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, avoiding any parameter being too large and不利于 the correction of the overall aberration of the optical lens group, or avoiding 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 front and rear group distances 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 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 of the relational formula, the refractive power of the third lens is too high, which is不利于 the balanced distribution of 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 conducive to adjusting the light-gathering ability and increasing the field of view angle;

[0043] 10. Satisfy the conditional formula 0.3 < R5 / f3 < 1.3, which is conducive to the correction of low-order aberrations;

[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 the 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 of Example 2.

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

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

[0060] Fig.10 This is the longitudinal chromatic aberration of the optical lens group of Example 2.

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

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

[0063] Fig.13 This is a field curvature diagram of the optical lens group of Example 3.

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

[0065] Fig.15 This is the longitudinal chromatic aberration of the optical lens group of Example 3.

[0066] The reference numerals are: a first lens 11 , a second lens 12 , a third lens 13 , a fourth lens 14 , a fifth lens 15 , a sixth lens 16 , an electronic photosensitive element 18 , a filter element 17 , and an aperture 10 . DETAILED DESCRIPTION

[0067] The present invention is further described in detail below in conjunction with examples and drawings, but the embodiments of the present invention are not limited thereto.

[0068] The present invention discloses that the present invention solves the problem through the following technical solution: an optical lens group for a vehicle-mounted lens, comprising six lenses, which sequentially comprise from the object side to the image side:

[0069] A first lens 11 with negative power, a second lens 12 with negative power, a third lens 13 with positive power, an aperture 10, a fourth lens 14 with positive power, a fifth lens 15 with positive power, and a sixth lens 16 with positive power; a filter element 17 that does not affect the focal length and an electronic photosensitive element 18 are arranged in sequence between the sixth lens 16 and the image side surface, and the electronic photosensitive element 18 is arranged on the image side surface;

[0070] The optical lens group satisfies the following conditional formula:

[0071] -0.3 < 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 expression allows for adjustable focal length and control of the system size.

[0072] 24 < TTL / AT56 < 115, where AT56 is the air space between the fifth lens 15 and the sixth lens 16. Meeting this conditional expression 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 expression 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, which includes six lenses, successively 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. A filter element 17 that does not affect the focal length and an electronic photosensitive element 18 are successively arranged between the sixth lens 16 and the image side, and the electronic photosensitive element 18 is arranged on the image side.

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

[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 air space between the third lens 13 and the fourth lens 14. Meeting this conditional expression allows for appropriate distance distribution between the lenses, which is beneficial for correcting the aberration of the optical lens group to improve the imaging quality.

[0078] 24 < TTL / AT56 < 115, where TTL is the total lens length of the optical lens group and AT56 is the air space between the fifth lens 15 and the sixth lens 16. Meeting this conditional expression allows for adjustment of the front and rear group distances and improvement of the 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 expression helps to maintain appropriate values for the system focal length and various optical parameters, avoiding excessive values of any parameter that may be不利 to the correction of the overall aberration of the optical lens group, or avoiding过小 values of any parameter that may affect assembly or increase manufacturing difficulties.

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

[0081] Preferably, the object side of the first lens 11 near the optical axis is convex, and the image side of the first lens near the optical axis is concave; the object side of the second lens 12 near the optical axis is convex, and the image side of the second lens 12 near the optical axis is concave; the object side of the third lens 13 near the optical axis is convex, and the image side of the third lens 13 near the optical axis is convex; the object side of the fourth lens 14 near the optical axis is flat, and the image side of the fourth lens 14 near the optical axis is convex; the object side of the fifth lens 15 near the optical axis is convex, and the image side of the fifth lens 15 near the optical axis is convex; the object side of the sixth lens 16 near the optical axis is concave, and the image side of the sixth lens 16 near the optical axis 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 equation 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 equation can provide flexibility in material selection 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 equation can make the second lens have an appropriate negative refractive power; if f2 / EFL is lower than the lower limit value 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 f2 / EFL is higher than the upper limit value 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 radius of curvature of the object side of the first lens 11, and f1 is the focal length of the first lens 11. Meeting this conditional expression is conducive to adjusting the light-gathering ability and increasing the field of view angle.

[0087] 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. Meeting this conditional expression is conducive to correcting low-order aberrations.

[0088] 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. Meeting this conditional expression 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 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; Meeting this conditional expression 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 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; Meeting this conditional expression 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 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; Meeting this conditional expression 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 16, and AT56 is the air gap between the fifth lens 15 and the sixth lens 16.

[0096] Meeting these two conditional expressions 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 equation 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 equation, by controlling the ratio of the central thickness of the sixth lens to 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; among them, 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 aspheric 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 aspheric curve equations of the above lenses are expressed as follows:

[0106]

[0107] Among them, X: the distance between the point on the aspheric surface at a distance Y from the optical axis and the tangent plane of the aspheric surface and the optical axis; Y: the perpendicular distance between the point on the aspheric surface and the optical axis;

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

[0109] K: conic coefficient;

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

[0111] Example 2, as Figure 6-10As shown, the first lens 11 and the fourth lens 14 are made of glass, and the second lens 12, the third lens 13, the fifth lens 15, and the sixth lens 16 are all made of plastic; wherein the image side of the third lens 13 near the optical axis is convex. This embodiment provides a six-piece optical lens group for a vehicle-mounted lens, and 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 curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0117]

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

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

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

[0121] K: cone coefficient;

[0122] A i : i-th order aspheric coefficient.

[0123] Embodiment 3, as Figure 11-15 As shown, the first lens 11 and the fourth lens 14 are made of glass, and the second lens 12, the third lens 13, the fifth lens 15, and the sixth lens 16 are all made of plastic; wherein the image side of the third lens 13 near the optical axis is convex. This embodiment provides a six-piece optical lens group for a vehicle-mounted lens, and 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 curve equations of the aspheric surfaces of the above lenses are expressed as follows:

[0129]

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

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

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

[0133] K: cone coefficient;

[0134] A i : i-th order aspheric coefficient.

[0135] The above embodiments only express three implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. An optical lens assembly for a vehicle-mounted lens, characterized in that: It includes six lenses, which successively include from the object side to the image side: The first lens (11) with negative optical power, the second lens (12) with negative optical power, the third lens (13) with positive optical power, the aperture (10), the fourth lens (14) with positive optical power, the fifth lens (15) with positive optical power, and the sixth lens (16) with 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 (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.

2. An optical lens assembly for a vehicle-mounted lens, characterized in that: It includes six lenses, which successively include from the object side to the image side: The first lens (11) with negative optical power, the second lens (12) with negative optical power, the third lens (13) with positive optical power, the aperture (10), the fourth lens (14) with positive optical power, the fifth lens (15) with positive optical power, and the sixth lens (16) with positive optical 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.

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

5. The 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 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).

6. The 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. The 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. The 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: -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 curvature radius 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 curvature radius of the object side of the fifth lens (15), and f5 is the focal length of the fifth lens (15).

9. The 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: -16 < (R1 - R2) / f1 < -2.5; where R1 is the curvature radius of the object side of the first lens (11), R2 is the curvature radius 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 curvature radius of the object side of the third lens (13), R6 is the curvature radius 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 curvature radius of the object side of the fifth lens (15), R10 is the curvature radius of the image side of the fifth lens (15), and f5 is the focal length of the fifth lens (15).

10. The 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: 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); 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).

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