Vehicle-mounted optical system and camera module applied by same

Abstract

The invention provides a vehicle-mounted optical system and a camera module applied to the vehicle-mounted optical system, the vehicle-mounted optical system is mainly composed of six lenses, the object plane side of the first lens is a convex surface, the image plane side is a concave surface, the focal power is negative, the object plane side of the second lens is a convex surface or a concave surface, the image plane side is a concave surface, the focal power is negative, the object plane side of the third lens is a convex surface or a concave surface, the image plane side is a concave surface, and the focal power is negative. The object plane side and the image plane side of the fourth lens are convex surfaces, the focal power of the fourth lens is positive, the object plane side and the image plane side of the fifth lens are convex surfaces, the focal power of the fifth lens is positive, the object plane side of the sixth lens is concave surfaces, the image plane side of the sixth lens is convex surfaces, and the focal power of the sixth lens is negative. The ultra-wide-angle high-definition optical system is simple in structure, the imaging quality of the optical system is improved by reasonably distributing the focal power of the lenses and optimizing the aberration of the lens, the ultra-wide-angle high-definition optical system has the characteristics of ultra-wide-angle, high-definition resolution and excellent temperature characteristic, and the ultra-wide-angle high-definition optical system has huge potential in the market.

Description

Technical Field

[0001] The present application relates to the field of optical imaging, and in particular to a vehicle-mounted optical system and a camera module used therein. Background Art

[0002] In recent years, with the continuous development of intelligent driving systems, vehicle-mounted surround view lenses have become one of the most popular applications of intelligent assisted driving systems, and the market size has gradually increased. However, the vehicle-mounted surround view lenses on the market currently have problems such as complex lens structure and poor imaging quality, which can no longer meet people's usage needs. Therefore, it is of great significance to design and manufacture high-pixel and stable imaging quality vehicle-mounted surround view lenses. Summary of the invention

[0003] In order to overcome the shortcomings of existing vehicle-mounted optical lenses, such as low pixels and small field of view, the present application provides a vehicle-mounted optical system and a camera module applied thereto, which uses a hybrid spherical and aspherical optical system and takes into account the characteristics of ultra-wide angle, high-definition resolution, and excellent temperature characteristics, and has great potential in the market.

[0004] A vehicle-mounted optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in sequence from an object plane to an image plane along an optical axis; The object side of the first lens is convex, the image side is concave, and its optical power is negative; The object side of the second lens is concave, the image side is concave, and its optical power is negative; The object side of the third lens is convex or concave, the image side is concave, and its optical power is positive; The object side and the image side of the fourth lens are both convex, and its optical power is positive; The object side and the image side of the fifth lens are both convex, and its optical power is positive; The object side of the sixth lens is concave, the image side is convex, and its optical power is negative.

[0005] Preferably, each lens of the optical system satisfies the following conditions: -7.1mm<f1<-5.2mm; -2.9mm<f2<-1.8mm; 7.1mm<f3<8.1mm; 3.8mm<f4<5.1mm; 1.5mm<f5<2.2mm; -3.6mm<f6<-2.4mm; Among them, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, and f6 is the focal length of the sixth lens.

[0006] Preferably, each lens of the optical system satisfies the following conditions: Nd1>1.7,Vd1<46.5; Nd2<1.6,Vd2>53.2; Nd3>1.6,Vd3<25; Nd4>1.5,Vd4<62; Nd5<1.6,Vd5>50.5; Nd6<1.7,Vd6<23.3; Among them, Nd1 is the refractive index of the first lens, and Vd1 is the Abbe number of the first lens; Nd2 is the refractive index of the second lens, and Vd2 is the Abbe number of the second lens; Nd3 is the refractive index of the third lens, and Vd3 is the Abbe number of the third lens; Nd4 is the refractive index of the fourth lens, and Vd4 is the Abbe number of the fourth lens; Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens; Nd6 is the refractive index of the sixth lens, and Vd6 is the Abbe number of the sixth lens.

[0007] Preferably, the maximum angle CRA of the full-field chief ray of the optical system incident on the image plane satisfies: CRA <16°.

[0008] Preferably, the curvature radius R1 of the object surface side of the first lens satisfies: 10<R1<14.

[0009] Preferably, the curvature radius R1 of the object surface side of the fifth lens satisfies: R1 > -1.35.

[0010] Preferably, the total optical length TTL of the optical system satisfies: TTL ≤ 16.95 mm.

[0011] Preferably, the fourth lens is a glass lens.

[0012] Preferably, the F number of the optical system is: 1.5≤F number≤1.9.

[0013] Preferably, the full field of view FOV of the optical system satisfies: 97.5°≤ FOV≤ 100.5°.

[0014] Preferably, the aperture is arranged between the third lens and the fourth lens.

[0015] Preferably, the fifth lens and the sixth lens are bonded together to form a combined lens.

[0016] On the other hand, an embodiment of the present application further provides a camera module, comprising at least an optical lens, wherein the above-mentioned vehicle-mounted optical system is installed in the optical lens.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a vehicle-mounted optical system and a camera module used therein, which are mainly composed of 6 lenses. The object surface side of the first lens is convex, the image surface side is concave, and the optical focal length is negative. The object surface side of the second lens is convex or concave, the image surface side is concave, and the optical focal length is negative. The object surface side of the third lens is convex or concave, the image surface side is concave, and the optical focal length is positive. The object surface side and the image surface side of the fourth lens are both convex, and the optical focal length is positive. The object surface side and the image surface side of the fifth lens are both convex, and the optical focal length is positive. The object surface side of the sixth lens is concave, the image surface side is convex, and the optical focal length is negative. The number of lenses is reasonable and the structure is simple. By reasonably allocating the optical focal length of the lenses, the lens aberrations are optimized, the imaging quality of the optical system is improved, and the characteristics of ultra-wide angle, high-definition resolution, and excellent temperature characteristics are taken into consideration. The system has great potential in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for describing the embodiments are briefly introduced below.

[0019] Figure 1 It is a structural schematic diagram of the optical system or camera module of Example 1 of the present application; Figure 2 is an astigmatism and distortion curve diagram of the optical system or camera module of Example 1 of the present application; Figure 3 is an MTF curve diagram of the optical system or camera module of Example 1 of the present application; Figure 4 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 2 of the present application; Figure 5 is an astigmatism and distortion curve diagram of the optical system or camera module of Example 2 of the present application; Figure 6 is an MTF curve diagram of the optical system or camera module of Example 2 of the present application; Figure 7 It is a structural schematic diagram of an optical system or a camera module according to Embodiment 3 of the present application; Figure 8 is an astigmatism and distortion curve diagram of the optical system or camera module of Example 3 of the present application; Fig. 9 It is the MTF curve diagram of the optical system or camera module of Example 3 of the present application. DETAILED DESCRIPTION

[0020] like Figure 1-9 As shown, the present application provides a vehicle-mounted optical system, which is composed of a first lens 1, a second lens 2, a third lens 3, an aperture 7, a fourth lens 4, a fifth lens 5, a sixth lens 6, and an infrared filter 8 in sequence along the optical axis from the object plane to the image plane 8.

[0021] The object side of the first lens is convex, the image side is concave, and its optical power is negative; The object side of the second lens is concave, the image side is concave, and its optical power is negative; The object side of the third lens is convex or concave, the image side is concave, and its optical power is positive; The object side and the image side of the fourth lens are both convex, and its optical power is positive; The object side and the image side of the fifth lens are both convex, and its optical power is positive; The object side of the sixth lens is concave, the image side is convex, and its optical power is negative; The fifth lens and the sixth lens are bonded together to form a combined lens.

[0022] The present invention provides a vehicle-mounted optical system and a camera module used therein, which are mainly composed of 6 lenses. The object surface side of the first lens is convex, the image surface side is concave, and the optical focal length is negative. The object surface side of the second lens is convex or concave, the image surface side is concave, and the optical focal length is negative. The object surface side of the third lens is convex or concave, the image surface side is concave, and the optical focal length is positive. The object surface side and the image surface side of the fourth lens are both convex, and the optical focal length is positive. The object surface side and the image surface side of the fifth lens are both convex, and the optical focal length is positive. The object surface side of the sixth lens is concave, the image surface side is convex, and the optical focal length is negative. The fifth lens and the sixth lens are bonded to each other to form a combined lens. The number of lenses is reasonable and the structure is simple. By reasonably allocating the optical focal length of the lenses, the lens aberration is optimized, the imaging quality of the optical system is improved, and the characteristics of ultra-wide angle, high-definition resolution, and excellent temperature characteristics are taken into consideration. The combined lens has great potential in the market.

[0023] Further, as a preferred embodiment of the present invention but not limiting, each lens of the optical system satisfies the following conditions, wherein f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, and f6 is the focal length of the sixth lens: -7.1mm<f1<-5.2mm. This design can make the first lens 1 have a large negative focal length, which is beneficial to reducing the astigmatism and field curvature of the optical system; -2.9mm<f2<-1.8mm, by constraining the ratio of the focal power of the second lens 2 to the effective focal length of the optical imaging system within a reasonable range, the spherical aberration of the system is fine-tuned and controlled, thereby effectively improving the imaging quality of the system; 7.1mm<f3<8.1 mm, by constraining the ratio of the focal power of the third lens 3 to the effective focal length of the optical imaging system within a reasonable range, the optical system has the advantages of ultra-wide angle, large aperture, small size and excellent temperature characteristics; 3.8mm<f4<5.1mm, by constraining the ratio of the focal power of the fourth lens 4 to the effective focal length of the optical imaging system within a reasonable range, the spherical aberration of the system is fine-tuned and controlled, thereby effectively improving the imaging quality of the system; 1.5mm<f5<2.2mm, by constraining the ratio of the focal power of the fifth lens 5 to the effective focal length of the optical imaging system within a reasonable range, the optical system has the advantages of ultra-wide angle, large aperture, small size and excellent temperature characteristics; -3.6mm<f6<-2.4mm, by constraining the ratio of the sixth lens 6 focal length to the effective focal length of the optical imaging system within a reasonable range, the configured vehicle-mounted surround view optical system has the advantages of ultra-wide angle, small aperture, large aperture and excellent temperature characteristics, compact structure, easy processing and installation, and at the same time, the configuration of large aperture can increase the amount of light entering the optical system and higher imaging quality.

[0024] Furthermore, the refractive index Nd1 and the Abbe number Vd1 of the first lens 1 satisfy: Nd1>1.7, Vd1<46.5. This design can effectively reduce chromatic aberration, optimize lens aberration, and thus effectively improve the imaging quality of the system. Furthermore, the refractive index Nd2 and the Abbe number Vd2 of the second lens 2 satisfy: Nd2<1.6, Vd2>53.2. This design can effectively reduce chromatic aberration, optimize lens aberration, and thus effectively improve the imaging quality of the system. Furthermore, the refractive index Nd3 and the Abbe number Vd3 of the third lens 3 satisfy: Nd3>1.6, Vd3<25. This design can effectively reduce chromatic aberration, optimize lens aberration, and thus effectively improve the imaging quality of the system. Furthermore, the refractive index Nd4 and the Abbe number Vd4 of the fourth lens 4 satisfy: Nd4>1.5, Vd4<62. This design can effectively reduce chromatic aberration, optimize lens aberration, and thus effectively improve the imaging quality of the system. Furthermore, the refractive index Nd5 and the Abbe number Vd5 of the fifth lens 5 satisfy: Nd5<1.6, Vd5>50.5. This design can effectively reduce chromatic aberration, optimize lens aberration, and thus effectively improve the imaging quality of the system. Furthermore, the refractive index Nd6 and the Abbe number Vd6 of the sixth lens 6 satisfy: Nd6<1.7, Vd6<23.3. This design can effectively reduce chromatic aberration, optimize lens aberration, and thus effectively improve the imaging quality of the system. Further, as a preferred embodiment of the present invention but not a limitation, the maximum angle CRA of the full-field chief light of the optical system incident on the image plane satisfies: CRA < 16°. This design can make the CRA of the lens more consistent with the CRA of the chip, thereby improving the photosensitivity efficiency of the chip.

[0025] Further, as a preferred embodiment of the present invention but not limitation, the curvature radius R1 of the object side of the first lens satisfies: 10 < R1 < 14. By controlling the object side of the first lens 1, the total deflection angle of the object side of the first lens 1 at the edge field of view can be reasonably controlled within a reasonable range.

[0026] Further, as a preferred embodiment of the present invention but not limitation, the curvature radius R1 of the object side of the sixth lens satisfies: R1 > -1.35. By limiting the curvature radius of the object side of the sixth lens 6, the shape of the sixth lens 6 can be effectively constrained, thereby effectively improving the imaging quality of the system.

[0027] Further, as a preferred embodiment of the present invention but not limitation, the total optical length TTL of the optical system satisfies: TTL ≤ 16.95 mm. This design can reduce the total optical length and effectively miniaturize the lens.

[0028] Further, as a preferred embodiment of the present invention but not limiting, the fourth lens is a glass lens, and this design can improve the performance under high and low temperature conditions; Further, as a preferred embodiment of the present invention but not limiting, the F number and FOV of the optical system satisfy: 1.5≤F number≤1.9, 97.5°≤FOV≤100.5°, and the configuration of a large aperture can increase the amount of light entering the optical system and higher imaging quality, and the ultra-wide angle meets the needs of users; Further, as a preferred embodiment of the present invention but not a limitation, the refractive index Nd5 and the Abbe number Vd5 of the fifth lens, and the refractive index Nd6 and the Abbe number Vd6 of the sixth lens, satisfy: Nd5<1.6, Vd5>50.5; Nd6<1.7, Vd6<23.3; this design increases the difference between the refractive index and the Abbe number of the lens, which can effectively reduce chromatic aberration.

[0029] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 1-3 As shown, in this embodiment 1, the focal length f1 of the first lens 1 is -6.59 mm, the focal length f2 of the second lens 2 is -2.46 mm, the focal length f3 of the third lens 3 is 7.66 mm, the focal length f4 of the fourth lens 4 is 4.40 mm, the focal length f5 of the fifth lens 5 is 1.84 mm, the focal length f6 of the sixth lens 6 is -3.03 mm, the total optical length TTL is 16.95 mm, and the surface type, curvature radius, thickness and material parameters of each lens are shown in Table 1: Table 1: Basic parameters of the optical system of Example 1

[0030] In the above Table 1, along the optical axis from the object plane to the image plane 9, OBJ is the object plane; S1 and S2 correspond to the two surfaces of the first lens 1; S3 and S4 correspond to the two surfaces of the second lens 2; S5 and S6 correspond to the two surfaces of the third lens 3; S8 and S9 correspond to the two surfaces of the fourth lens 4; S9 and S10 correspond to the two surfaces of the fifth lens 5; S11 and S12 correspond to the two surfaces of the sixth lens 6; STO is the position of the aperture 7; S11 and S12 correspond to the two surfaces of the filter 8; IMA corresponds to the image plane 9.

[0031] Further, in Table 1, the object side and image side of any one of the second lens 2, the third lens 3, the fifth lens 5, and the sixth lens 6 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical formula:

[0032] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 2 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface that can be used in Example 1.

[0033] Table 2: Aspheric surface related values ​​of the lens surface of Example 1

[0034] Figure 2 The astigmatism and distortion curves of the optical imaging lens of Example 1 are shown, where astigmatism represents the meridional image curvature and the sagittal image curvature, and distortion represents the distortion magnitude values ​​corresponding to different image heights; Figure 3 The MTF curve of the optical imaging lens of Example 1 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view at different spatial frequencies. Figure 2 and Figure 3 It can be seen that the optical imaging system provided in Example 1 can achieve good imaging quality and has higher imaging quality.

[0035] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 4-6As shown, in this embodiment 2, the focal length f1 of the first lens 1 is -6.25mm, the focal length f2 of the second lens 2 is -2.66mm, the focal length f3 of the third lens 3 is 7.36mm, the focal length f4 of the fourth lens 4 is 4.21mm, the focal length f5 of the fifth lens 5 is 1.84mm, the focal length f6 of the sixth lens 6 is -2.93mm, the total optical length TTL is 16.95mm, and the surface type, curvature radius, thickness and material parameters of each lens are shown in Table 3: Table 3: Basic parameters of the optical system of Example 2

[0036] In the above Table 3, along the optical axis from the object plane to the image plane 9, OBJ is the object plane; S1 and S2 correspond to the two surfaces of the first lens 1; S3 and S4 correspond to the two surfaces of the second lens 2; S5 and S6 correspond to the two surfaces of the third lens 3; S8 and S9 correspond to the two surfaces of the fourth lens 4; S9 and S10 correspond to the two surfaces of the fifth lens 5; S11 and S12 correspond to the two surfaces of the sixth lens 6; STO is the position of the aperture 7; S13 and S14 correspond to the two surfaces of the filter 8; IMA corresponds to the image plane 9.

[0037] Further, in Table 3, the object side surface and the image side surface of any one of the second lens 2, the third lens 3, the fifth lens 5, and the sixth lens 6 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0038] Wherein, x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface shape formula. Table 4 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspherical surface that can be used in Example 2.

[0039] Table 4: Aspheric surface related values ​​of lens surface in Example 2

[0040] Figure 5 The astigmatism and distortion curves of the optical imaging lens of Example 2 are shown, where astigmatism represents the meridional image curvature and the sagittal image curvature, and distortion represents the distortion magnitude values ​​corresponding to different image heights; Figure 6 The MTF curve of the optical imaging lens of Example 2 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view at different spatial frequencies. Figure 5 and Figure 6It can be seen that the optical imaging system provided in Example 2 can achieve good imaging quality and has higher imaging quality.

[0041] Specifically, as a preferred embodiment of the present invention but not limiting, Figure 7-9 As shown, in this embodiment 3, the focal length f1 of the first lens 1 is -6.44 mm, the focal length f2 of the second lens 2 is -2.46 mm, the focal length f3 of the third lens 3 is 7.47 mm, the focal length f4 of the fourth lens 4 is 4.72 mm, the focal length f5 of the fifth lens 5 is 1.84 mm, the focal length f6 of the sixth lens 6 is -2.93 mm, the total optical length TTL is 16.95 mm, and the surface type, curvature radius, thickness and material parameters of each lens are shown in Table 5: Table 5: Basic parameters of the optical system of Example 3

[0042] In the above Table 5, along the optical axis from the object plane to the image plane 9, OBJ is the object plane; S1 and S2 correspond to the two surfaces of the first lens 1; S3 and S4 correspond to the two surfaces of the second lens 2; S5 and S6 correspond to the two surfaces of the third lens 3; S8 and S9 correspond to the two surfaces of the fourth lens 4; S9 and S10 correspond to the two surfaces of the fifth lens 5; S11 and S12 correspond to the two surfaces of the sixth lens 6; STO is the position of the aperture 7; S13 and S14 correspond to the two surfaces of the filter 8; IMA corresponds to the image plane 9.

[0043] Further, in Table 5, the object side and image side of any one of the second lens 2, the third lens 3, the fifth lens 5, and the sixth lens 6 are aspherical surfaces, and the surface shape of each aspherical lens can be defined by but not limited to the following aspherical formula:

[0044] Wherein, x is the distance from the corresponding point on the aspheric surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspheric surface to the optical axis, c is the curvature of the vertex of the aspheric surface, k is the cone coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface shape formula. Table 6 shows the cone coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 of each aspheric surface that can be used in Example 3.

[0045] Table 6: Aspheric surface related values ​​of lens surface in Example 3

[0046] Figure 8The astigmatism and distortion curves of the optical imaging lens of Example 3 are shown, where astigmatism represents the meridional image curvature and the sagittal image curvature, and distortion represents the distortion magnitude values ​​corresponding to different image heights; Fig. 9 The MTF curve of the optical imaging lens of Example 3 is shown, which represents the MTF values ​​in the meridian direction and sagittal direction of different fields of view at different spatial frequencies. Figure 8 and Fig. 9 It can be seen that the optical imaging system provided in Example 3 can achieve good imaging quality and has higher imaging quality.

[0047] Further, in Examples 1-3, the basic data are as follows: Table 7: Basic data of Examples 1-3

[0048] A camera module at least includes an optical lens, in which the above-mentioned vehicle-mounted optical system is installed. The vehicle-mounted lens of the present invention has the characteristics of ultra-wide angle, high-definition resolution, and excellent temperature characteristics, and has stronger competitiveness among lenses of the same type.

[0049] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the present invention is not limited to these descriptions. Any similarity or similarity with the method, structure, etc. of the present invention, or any technical deduction or replacement based on the concept of the present invention, shall be regarded as the protection scope of the present invention.

Claims

1. A vehicle-mounted optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens in sequence from the object plane to the image plane along the optical axis. Features: The object side of the first lens is convex, the image side is concave, and its optical power is negative; The object side of the second lens is concave, the image side is concave, and its optical power is negative; The object side of the third lens is convex or concave, the image side is concave, and its optical power is positive; The object side and the image side of the fourth lens are both convex, and its optical power is positive; The object side and the image side of the fifth lens are both convex, and its optical power is positive; The object side of the sixth lens is concave, the image side is convex, and its optical power is negative; The fifth lens and the sixth lens are bonded together to form a combined lens; -7.1 mm<f1<-5.2 mm; -2.9 mm<f2<-1.8 mm; 7.1 mm<f3<8.1 mm; 3.8 mm<f4<5.1 mm; 1.5 mm<f5<2.2 mm; -3.6 mm<f6<-2.4 mm; Among them, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, and f6 is the focal length of the sixth lens.

2. The vehicle-mounted optical system according to claim 1, Features: The curvature radius R1 of the object surface side of the first lens satisfies: 10 < R1 < 14; The curvature radius R1 of the object surface side of the sixth lens satisfies: R1 > -1.

35.

3. The vehicle-mounted optical system according to claim 1, Features: Each lens of the optical system meets the following conditions: Nd1>1.7,Vd1<46.5; Nd2<1.6,Vd2>53.2; Nd3>1.6,Vd3<25; Nd4>1.5,Vd4<62; Nd5<1.6,Vd5>50.5; Nd6<1.7,Vd6<23.3; Among them, Nd1 is the refractive index of the first lens, and Vd1 is the Abbe number of the first lens; Nd2 is the refractive index of the second lens, and Vd2 is the Abbe number of the second lens; Nd3 is the refractive index of the third lens, and Vd3 is the Abbe number of the third lens; Nd4 is the refractive index of the fourth lens, and Vd4 is the Abbe number of the fourth lens; Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens; Nd6 is the refractive index of the sixth lens, and Vd6 is the Abbe number of the sixth lens.

4. The vehicle-mounted optical system according to any one of claims 1 to 3, Features: The maximum angle CRA of the full-field chief ray incident on the image plane of the optical system satisfies: CRA < 16°.

5. The vehicle-mounted optical system according to any one of claims 1 to 3, Features: The full field of view FOV of the optical system satisfies: 97.5°≤ FOV≤ 100.5°.

6. The vehicle-mounted optical system according to any one of claims 1 to 3, Features: The total optical length TTL of the optical system satisfies: TTL ≤ 16.95 mm.

7. The vehicle-mounted optical system according to any one of claims 1 to 3, Features: The fourth lens is a glass lens.

8. The vehicle-mounted optical system according to any one of claims 1 to 3, Features: The F number of the optical system is: 1.5≤F number≤1.

9.

9. The vehicle-mounted optical system according to any one of claims 1 to 3, Features: The aperture is arranged between the third lens and the fourth lens.

10. A camera module, comprising at least an optical lens, Features: The optical lens is equipped with the vehicle-mounted optical system according to any one of claims 1 to 9.

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