Full-glass vehicle-mounted day and night confocal optical system and camera module applied by same

Abstract

The invention provides an all-glass vehicle-mounted day and night confocal optical system and a camera module using the same, the all-glass vehicle-mounted day and night confocal optical system is mainly composed of eight lenses, the first lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface, the second lens has negative focal power, the object side surface is a concave surface, and the image side surface is a convex surface; the third lens has positive focal power, the object side surface is a convex surface, the image side surface is a concave surface, the fourth lens has negative focal power, the object side surface is a convex surface, the image side surface is a concave surface, the fifth lens has positive focal power, the object side surface is a convex surface, the image side surface is a convex surface, and the fourth lens and the fifth lens form a bonding lens. The sixth lens has positive focal power, the object side face of the sixth lens is a convex face, the image side face of the sixth lens is a convex face, the seventh lens has negative focal power, the image side face of the seventh lens is a concave face, the eighth lens has focal power, and the image side face of the eighth lens is a concave face. And the picture illumination uniformity and the imaging definition are improved.

Description

Technical Field

[0001] This application relates to the field of optical imaging, in particular to a full-glass vehicle-mounted day-night confocal optical system and a camera module using the same. Background Art

[0002] In recent years, intelligent driving technology has been continuously developing, and vehicle-mounted applications have emerged in an endless stream. As a core key component of the intelligent driving system, vehicle-mounted lenses are related to the safety of vehicles using the intelligent driving system. With the improvement of people's requirements for the imaging quality of lenses, due to the fact that small-aperture lenses cannot fully meet the shooting requirements in low-illumination environments, large apertures have become the trend of photographic lens products. At present, a series of large-aperture lenses have appeared on the market, but there are few large-aperture medium and long focal length lenses, and even fewer lenses that can simultaneously meet large apertures and infrared confocal requirements. In view of this, it is urgent to design a medium and long focal length lens that can simultaneously meet large apertures and infrared confocal requirements to meet market needs. Summary of the Invention

[0003] This application aims to provide a full-glass vehicle-mounted day-night confocal optical system, which has the advantages of high pixel and high resolution design, is structurally compact, convenient for processing and installation, and further improves the imaging effect of the equipment equipped with this system.

[0004] A full-glass vehicle-mounted day-night confocal optical system is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens in sequence along the optical axis from the object plane to the image plane; The first lens has a negative optical power, its object side is convex, and its image side is concave; The second lens has a negative optical power, its object side is concave, and its image side is convex; The third lens has a positive optical power, its object side is convex, and its image side is concave; The fourth lens has a negative optical power, its object side is convex, and its image side is concave; The fifth lens has a positive optical power, its object side is convex, and its image side is convex; The fourth lens and the fifth lens form a cemented lens; The sixth lens has a positive optical power, its object side is convex, and its image side is convex; The seventh lens has a negative optical power, and its image side is concave; The eighth lens has an optical power, and its image side is concave.

[0005] For the full-glass vehicle-mounted day-night confocal optical system as described above, the full field of view angle FOV of the optical system ∈ [100°, 200°], and the total length of the optical system TTL ≤ 30 mm.

[0006] For the all-glass vehicle-mounted day-night confocal optical system as described above, the optical system satisfies the following relationship: D1 / (Fno*Ymax) < 1.0; where D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system.

[0007] For the all-glass vehicle-mounted day-night confocal optical system as described above, the optical system satisfies the following relationships: -12.5 mm < f1 < -5.0 mm; -50.0 mm < f2 < -25.0 mm; 5.0 mm < f3 < 35.0 mm; -20.0 mm < f4 < -5.0 mm; 2.0 mm < f5 < 15.0 mm; 5.0 mm < f6 < 15.0 mm; -5.0 mm < f7 < -5.0 mm; -95.0 mm < f8 < 30.0 mm; where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens.

[0008] For the all-glass vehicle-mounted day-night confocal optical system as described above, the optical system satisfies the following relationships: -5.0 < f1 / f < -1.0; -10.0 < f2 / f < -3.0; 1.0 < f3 / f < 5.0; -3.0 < f4 / f < -1.0; 0.5 < f5 / f < 1.5; 1.0 < f6 / f < 3.0; -3.0 < f7 / f < -0.5; -20.0 < f8 / f < 10.0; where f is the focal length of the entire optical system, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens.

[0009] For the all-glass vehicle-mounted day-night confocal optical system as described above, the optical system satisfies the following relationship: -5.0 < R3 / f < -0.01; where R3 is the object-side curvature of the second lens and f is the total focal length of the optical system.

[0010] For the all-glass vehicle-mounted day-night confocal optical system as described above, the optical system satisfies the following relationship: 0.1 < R1 / f < 12; where R1 is the object-side curvature of the first lens and f is the total focal length of the optical system.

[0011] For the all-glass vehicle-mounted day-night confocal optical system as described above, the optical system satisfies the following relationship: Nd3 < 1.95; where Nd3 is the refractive index of the material of the third lens.

[0012] The all-glass vehicle-mounted day-night confocal optical system as described above satisfies the following relationship: H / f < 1.5; where H is the image height of the optical system and f is the total focal length of the optical system.

[0013] The all-glass vehicle-mounted day-night confocal optical system as described above satisfies the following relationship: TTL / f < 5; where f is the total focal length of the optical system and TTL is the total optical length of the optical system.

[0014] For the all-glass vehicle-mounted day-night confocal optical system as described above, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, and the eighth lens are spherical lenses, and the aperture stop is located between the third lens and the fourth lens.

[0015] On the other hand, an embodiment of the present application further provides an imaging module, which at least includes an optical lens, and the above-mentioned all-glass vehicle-mounted day-night confocal optical system is installed in the optical lens.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: The present invention provides an all-glass vehicle-mounted day-night confocal optical system and an imaging module using the same. It mainly consists of 8 lenses, has a simple structure, and has advantages such as high resolution, large target surface, small volume, high relative illumination, and high-pixel imaging. It improves the uniformity of the picture illumination and the imaging clarity, and the head size of the lens is smaller, the field of view that can be photographed is wider, and the production cost of the day-night confocal vehicle-mounted lens is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments.

[0018] Figure 1 is a schematic structural diagram of the optical system or the imaging module in Embodiment 1 of the present application; Figure 2 is the field curvature curve and distortion curve of the optical system or the imaging module in Embodiment 1 of the present application; Figure 3 is a schematic structural diagram of the optical system or the imaging module in Embodiment 2 of the present application; Figure 4 is the field curvature curve and distortion curve of the optical system or the imaging module in Embodiment 2 of the present application; Figure 5 is a schematic structural diagram of the optical system or the imaging module in Embodiment 3 of the present application; Figure 6 is the field curvature curve and distortion curve of the optical system or the imaging module in Embodiment 3 of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] As shown Figure 1-6 in the figure, the present application provides a full-glass vehicle-mounted day-night confocal optical system, which is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens in sequence along the optical axis from the object plane to the image plane; the first lens has a negative focal power, its object side is convex, and its image side is concave; the second lens has a negative focal power, its object side is concave, and its image side is convex; the third lens has a positive focal power, its object side is convex, and its image side is concave; the fourth lens has a negative focal power, its object side is convex, and its image side is concave; the fifth lens has a positive focal power, its object side is convex, and its image side is convex; the fourth lens and the fifth lens form a cemented lens; the sixth lens has a positive focal power, its object side is convex, and its image side is convex; the seventh lens has a negative focal power, its image side is concave; the eighth lens has a focal power, its image side is concave.

[0020] The present invention provides a full-glass vehicle-mounted day-night confocal optical system and an imaging module using the same. The optical system is mainly composed of 8 lenses. It has the advantages of simple structure, high resolution, large target surface, small volume, high relative illumination, and high-pixel imaging, improving the illumination uniformity and imaging clarity of the image. Moreover, the head size of the lens is smaller, the field of view that can be captured is wider, and the production cost of the day-night confocal vehicle-mounted lens is reduced.

[0021] Furthermore, the optical system satisfies the following relationship: FOV ∈ [100°, 200°], where FOV is the maximum field of view angle of the optical system. The design of the large field of view angle of the optical system effectively meets the actual requirements of the large field of view of the optical system.

[0022] Furthermore, the optical system satisfies the following relationship: D1 / (Fno * Ymax) < 1.0, where D1 is the maximum effective optical diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system. The limitation of the maximum image circle and aperture size of the optical imaging system can achieve the purpose of limiting the effective optical diameter of the first lens and ensure the miniaturization requirement of the optical system.

[0023] Further, the optical system satisfies the following relationships: -12.5 mm < f1 < -5.0 mm; -50.0 mm < f2 < -25.0 mm; 5.0 mm < f3 < 35.0 mm; -20.0 mm < f4 < -5.0 mm; 2.0 mm < f5 < 15.0 mm; 5.0 mm < f6 < 15.0 mm; -5.0 mm < f7 < -5.0 mm; -95.0 mm < f8 < 30.0 mm; where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens. Reasonable control of the effective focal lengths of the lenses in the optical system can enable the optical system to satisfy a large field of view angle while restricting the effective diameter of the components, controlling the size of the overall optical system, and adjusting the light incident angle, which is beneficial to correcting the system aberration.

[0024] Further, the optical system satisfies the following relationships: -5.0 < f1 / f < -1.0; -10.0 < f2 / f < -3.0; 1.0 < f3 / f < 5.0; -3.0 < f4 / f < -1.0; 0.5 < f5 / f < 1.5; 1.0 < f6 / f < 3.0; -3.0 < f7 / f < -0.5; -20.0 < f8 / f < 10.0; where f is the focal length of the entire optical system, where f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens. The limitation of the ratio of the effective focal lengths of each lens to the effective focal length of the optical system enables the optical system to obtain a reasonable light deflection angle, effectively reduces the sensitivity of the component tolerances, and improves the system aberration.

[0025] Further, the optical system satisfies the following relationships: -5.0 < R3 / f < -0.01; 0.1 < R1 / f < 12; where R3 is the object-side curvature of the second lens and R1 is the object-side curvature of the first lens, and f is the total focal length of the optical system. By controlling the curvatures of the object sides of the first lens and the second lens, the distortion of the entire optical imaging lens within a small angle range can be significantly increased to meet the special distortion requirements of the vehicle-mounted imaging system.

[0026] Further, the optical system satisfies the following relationship: Nd3 < 1.95; where Nd3 is the refractive index of the third lens material; the reasonable selection of the lens material refractive index helps to make the light more gentle, effectively reduces the primary aberration and various higher-order aberrations generated by the optical system, and is beneficial to achieving high resolution.

[0027] Further, the optical system satisfies the following relationship: H / f < 1.5; where H is the image height of the optical system and f is the total focal length of the optical system. By controlling the focal length and image height of the optical system within a certain range, it is beneficial to improve the resolution of the entire optical imaging system and achieve high resolution.

[0028] Further, the optical system satisfies the following relationship: TTL / f < 5; where TTL is the overall optical length of the optical system and f is the total focal length of the optical system. The limitation of the ratio of the overall optical length to the effective focal length of the optical system can effectively limit the length of the lens under the condition of a fixed focal length.

[0029] Example 1 The following is a reference Figures 1 to 2 to describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 FIG. shows a schematic structural diagram of the optical imaging lens according to Embodiment 1 of the present application.

[0030] As Figure 1 shown, the optical imaging lens according to an exemplary embodiment of the present application sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and an imaging surface S19.

[0031] The first lens E1 has a negative optical power, its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has a negative optical power, its object side surface S3 is concave, and its image side surface S4 is convex. The third lens E3 has a positive optical power, its object side surface S5 is convex, and its image side surface S6 is concave. The fourth lens E4 has a negative optical power, its object side surface S8 is convex, and its image side surface S9 is concave. The fifth lens E5 has a positive optical power, its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has a positive optical power, its object side surface S11 is convex, and its image side surface S12 is convex. The seventh lens E7 has a positive optical power, its object side surface S13 is concave, and its image side surface S14 is concave. The eighth lens E8 has a positive optical power, its object side surface S15 is convex, and its image side surface S16 is concave. The filter E9 has an object side surface S17 and an image side surface S18. Light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0032] Table 1 shows the surface types, radii of curvature, thicknesses, and materials of the lenses of the optical imaging lens of Example 1, where the units of the radii of curvature and thicknesses are both millimeters (mm).

[0033] Table 1

[0034] In Table 1, the object side and the image side of the sixth lens E6 and the eighth lens E8 are both aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0035] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula. Table 2 gives the conic coefficients and the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the respective aspherical surfaces that can be used in the first embodiment.

[0036] Table 2

[0037] Figure 2 Shows the field curvature curve and the distortion curve of the optical imaging lens of Embodiment 1. The optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0038] Embodiment Two The following refers to Figures 3 to 4 Describe the optical imaging lens according to Embodiment 2 of the present application. Figure 3 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 2 of the present application.

[0039] As Figure 3 Shown, the optical imaging lens according to the exemplary embodiment of the present application sequentially includes, along the optical axis from the object side to the image side: a first lens E1, a second lens E2, a third lens E3, STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and an imaging surface S19.

[0040] The first lens E1 has a negative focal power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative focal power, its object side S3 is concave, and its image side S4 is convex. The third lens E3 has a positive focal power, its object side S4 is convex, and its image side S5 is concave. The fourth lens E4 has a negative focal power, its object side S8 is convex, and its image side S9 is concave. The fifth lens E5 has a positive focal power, its object side S9 is convex, and its image side S10 is convex. The sixth lens E6 has a positive focal power, its object side S11 is convex, and its image side S12 is convex. The seventh lens E7 has a positive focal power, its object side S13 is convex, and its image side S14 is concave. The eighth lens E8 has a positive focal power, its object side S15 is convex, and its image side S16 is concave. The filter E9 has an object side S17 and an image side S18. The light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0041] Table 3 shows the surface types, radii of curvature, thicknesses, and materials of the lenses of the optical imaging lens of Example 2, where the units of the radius of curvature and the thickness are both millimeters (mm).

[0042] Table 3

[0043] In Table 3, the object sides and image sides of the sixth lens E6 and the eighth lens E8 are both aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0044] where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula. Table 4 gives the conic coefficients and the high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces that can be used in the second embodiment.

[0045] Table 4

[0046] Figure 4 Shows the field curvature curve and distortion curve of the optical imaging lens of Example 2. The optical imaging lens given in Example 2 can achieve good imaging quality.

[0047] Example Three The following refers to Figures 5 to 6 Describe the optical imaging lens according to Embodiment 3 of the present application. Figure 5 Shows a schematic structural diagram of the optical imaging lens according to Embodiment 3 of the present application.

[0048] As shown Figure 5 in the figure, the optical imaging lens according to an exemplary embodiment of the present application sequentially includes, from the object side to the image side along the optical axis: a first lens E1, a second lens E2, a third lens E3, a STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, an eighth lens E8, and an imaging surface S19.

[0049] The first lens E1 has a negative focal power, its object surface S1 is convex, and its image surface S2 is concave. The second lens E2 has a negative focal power, its object surface S3 is concave, and its image surface S4 is convex. The third lens E3 has a positive focal power, its object surface S5 is convex, and its image surface S6 is concave. The fourth lens E4 has a negative focal power, its object surface S8 is convex, and its image surface S9 is concave. The fifth lens E5 has a positive focal power, its object surface S9 is convex, and its image surface S10 is convex. The sixth lens E6 has a positive focal power, its object surface S11 is convex, and its image surface S12 is convex. The seventh lens E7 has a positive focal power, its object surface S13 is convex, and its image surface S14 is concave. The eighth lens E8 has a negative focal power, its object surface S15 is concave, and its image surface S16 is concave. The filter E9 has an object surface S17 and an image surface S18. The light from the object sequentially passes through the surfaces S1 to S18 and finally forms an image on the imaging surface S19.

[0050] Table 5 shows the surface types, radii of curvature, thicknesses, and materials of the lenses of the optical imaging lens of Example 3, where the units of the radii of curvature and thicknesses are both millimeters (mm).

[0051] Table 5

[0052] In Table 5, the object surfaces and image surfaces of the sixth lens E6 and the eighth lens E8 are both aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0053] where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the surface vertex, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the aspherical vertex, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high-order term in the aspherical surface profile formula. Table 6 gives the conic coefficients and high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of the aspherical surfaces that can be used in the third embodiment.

[0054] Table 6

[0055] In Examples 1-3, the basic data are as follows: Table 7

[0056] In Examples 1-3, each conditional expression satisfies the conditions in the following table: Table 8

[0057] An imaging module includes at least an optical lens, and the above-mentioned all-glass vehicle-mounted day-night confocal optical system is installed in the optical lens. It has a simple structure and has the advantages of high resolution, large target surface, small volume, high relative illumination, and high-pixel imaging, etc. It improves the uniformity of the picture illumination and the imaging clarity, and the head size of the lens is smaller, the field of view that can be photographed is wider, and the production cost of the day-night confocal vehicle-mounted lens is reduced.

[0058] As described above, one or more implementation manners are provided in combination with specific contents, and it is not determined that the specific implementation of the present invention is only limited to these descriptions. All those that are similar or identical to the method and structure of the present invention, or those that make several technical deductions or substitutions under the premise of the inventive concept of the present invention, should be regarded as the protection scope of the present invention.

Claims

1. An all-glass vehicle-mounted day and night confocal optical system, which is composed of a first lens, a second lens, a third lens, an aperture, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens in sequence from the object plane to the image plane along the optical axis, characterized in that: The first lens has negative optical power, its object side surface is convex, and its image side surface is concave; The second lens has negative optical power, its object side surface is concave, and its image side surface is convex; The third lens has positive refractive power, its object side surface is convex, and its image side surface is concave; The fourth lens has negative optical power, its object side surface is convex, and its image side surface is concave; The fifth lens has positive refractive power, its object side surface is convex, and its image side surface is convex; The fourth lens and the fifth lens constitute a cemented lens; The sixth lens has positive refractive power, its object side surface is convex, and its image side surface is convex; The seventh lens has negative optical power, and its image side surface is concave; The eighth lens has optical power, and its image side surface is concave; The optical system satisfies the following relationship: -12.5mm < f1 < -5.0mm; -50.0mm < f2 <-25.0mm; 5.0mm < f3 < 35.0mm; -20.0mm < f4 <-5.0mm; 2.0mm < f5 < 15.0mm; 5.0mm < f6 < 15.0mm; -5.0mm < f7 < -5.0mm; -95.0mm < f8 < 30.0mm; Among them, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens.

2. The all-glass vehicle-mounted day and night confocal optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: -5.0< f1 / f < -1.0; -10.0< f2 / f < -3.0; 1.0< f3 / f < 5.0; -3.0 < f4 / f < -1.0; 0.5< f5 / f < 1.5; 1.0< f6 / f < 3.0; -3.0< f7 / f < -0.5; -20.0< f8 / f < 10.0; Wherein, f is the focal length of the entire optical system, f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, f3 is the effective focal length of the third lens, f4 is the effective focal length of the fourth lens, f5 is the effective focal length of the fifth lens, f6 is the effective focal length of the sixth lens, f7 is the effective focal length of the seventh lens, and f8 is the effective focal length of the eighth lens.

3. The all-glass vehicle-mounted day and night confocal optical system according to claim 1 or 2, characterized in that: The full field of view FOV∈[100°, 200°] of the optical system, and the total length TTL of the optical system ≤30 mm.

4. The all-glass vehicle-mounted day and night confocal optical system according to claim 1 or 2, characterized in that: The optical system satisfies the following relationship: D1 / (Fno*Ymax) <1.0; Wherein, D1 is the maximum effective diameter of the first lens, Fno is the system aperture, and Ymax is the maximum image circle radius of the system.

5. The all-glass vehicle-mounted day and night confocal optical system according to claim 1 or 2, characterized in that: The optical system satisfies the following relationship: -5.0 <R3 / f<-0.01; 0.1 <R1 / f<12; Wherein, R3 is the object curvature of the second lens, R1 is the object curvature of the first lens, and f is the total focal length of the optical system.

6. The all-glass vehicle-mounted day and night confocal optical system according to claim 1 or 2, characterized in that: The optical system satisfies the following relationship: Nd3<1.95; Wherein, Nd3 is the refractive index of the third lens material.

7. The all-glass vehicle-mounted day and night confocal optical system according to claim 1 or 2, characterized in that: The optical system satisfies the following relationship: H / f < 1.5; Wherein, H is the image height of the optical system, and f is the total focal length of the optical system.

8. The all-glass vehicle-mounted day and night confocal optical system according to claim 1 or 2, characterized in that: The optical system satisfies the following relationship: TTL / f < 5.0; Wherein, f is the total focal length of the optical system, and TTL is the total optical length of the optical system.

9. The all-glass vehicle-mounted day and night confocal optical system according to claim 1 or 2, characterized in that: The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are spherical lenses.

10. A camera module, comprising at least an optical lens, characterized in that: The optical lens is equipped with the all-glass vehicle-mounted day and night confocal optical system described in any one of claims 1 to 9.

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