Glass-plastic day and night confocal vehicle-mounted optical system and camera module applied by glass-plastic day and night confocal vehicle-mounted optical system

Abstract

The invention provides a glass-plastic day and night confocal vehicle-mounted optical system and a camera module applying the same, and the system mainly comprises seven lenses, the first lens has negative focal power, the object side surface is a convex surface, the image side surface is a concave surface, the second lens has negative focal power, the object side surface is a concave surface, the image side surface is a convex surface, the third lens has positive focal power, the side surface is a convex surface, and the fourth lens has positive focal power. The fourth lens has negative focal power, the object side surface is a convex surface and the image side surface is a concave surface, the fifth lens has positive focal power, the object side surface is a convex surface and the image side surface is a convex surface, the sixth lens has positive focal power, the object side surface is a convex surface and the image side surface is a convex surface, and the seventh lens has focal power, the object side surface is a convex surface and the image side surface is a concave surface. The glass-plastic day and night confocal vehicle-mounted lens has the advantages of high resolution, small size, high relative illumination, small distortion and the like, the uniformity of image illumination and the imaging definition are improved, the head size of the lens is smaller, the shooting view field range is wider, and the production cost of the glass-plastic day and night confocal vehicle-mounted lens is reduced.

Description

Technical Field

[0001] This application relates to the field of optical imaging, and particularly to a plastic-glass day-night confocal vehicle-mounted 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, the vehicle-mounted lens is related to the safety of vehicles using the intelligent driving system, and people have higher requirements for high pixel and high resolution of the lens. In addition, since the day-night confocal lens is generally installed in front of the driver's seat, in order to better hide the lens, miniaturization of the small front end is also particularly important.

[0003] In view of this, there is an urgent need to design a medium and long focal length lens that can simultaneously meet the requirements of small distortion, miniaturization, and infrared confocal to meet the market demand. Summary of the Invention

[0004] This application aims to provide a plastic-glass day-night confocal vehicle-mounted optical system, which has the advantages of high pixel and high resolution design, a compact structure, is convenient for processing and installation, and further improves the imaging effect of the equipment equipped with this system.

[0005] A plastic-glass day-night confocal vehicle-mounted optical system is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh 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, and its object side is convex; 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 focal power, its object side is convex, and its image side is concave; For the plastic-glass day-night confocal vehicle-mounted optical system as described above, the full field of view FOV of the optical system satisfies FOV ∈ [70°, 120°], and the total length of the optical system TTL ≤ 14.4 mm.

[0006] For the plastic and glass day and night confocal vehicle-mounted optical system described above, the optical system satisfies the following relationship: D1 / (Fno*Ymax) < 1.3; 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 plastic and glass day and night confocal vehicle-mounted optical system described above, the optical system satisfies the following relationships: -6.0 mm < f1 < -4.0mm; -20.0mm < f2 < -8.0mm; 4.0mm < f3 < 8.0mm; 2.0mm < f4 < 5.0mm; -5.0mm < f5 < -2.0mm; 4.0mm < f6 < 15.0mm; 20.0mm < |f7|; 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, and f7 is the effective focal length of the seventh lens.

[0008] For the plastic and glass day and night confocal vehicle-mounted optical system described above, the optical system satisfies the following relationships: -3.0 < f1 / f < -1.0; -8.0 < f2 / f < -2.5; 5.0 < f3 / f < 1.0; 0.5 < f4 / f < 2.0; -2.0 < f5 / f < -0.5; 0.5 < f6 / f < 3.0; 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, and f7 is the effective focal length of the seventh lens.

[0009] For the plastic and glass day and night confocal vehicle-mounted optical system described above, the optical system satisfies the following relationship: -5.0 < R13 / f < -0.5; where R13 is the object-side curvature of the seventh lens and f is the total focal length of the optical system.

[0010] For the plastic and glass day and night confocal vehicle-mounted optical system described above, the optical system satisfies the following relationship: 0.2 < R14 / f < 2.0; where R14 is the image-side curvature of the seventh lens and f is the total focal length of the optical system.

[0011] For the plastic and glass day and night confocal vehicle-mounted optical system described above, the optical system satisfies the following relationship: 1.0 < R1 / f < 2.0; where R1 is the object-side curvature of the first lens and f is the total focal length of the optical system.

[0012] The above-mentioned glass-plastic day-night confocal vehicle-mounted optical system satisfies the following relationship: -3.0 < R13 / R14 < -0.5; where R13 is the object-side curvature of the second lens, R14 is the object-side curvature of the first lens, and f is the total focal length of the optical system.

[0013] The above-mentioned glass-plastic day-night confocal vehicle-mounted optical system satisfies the following relationship: Nd3 < 1.95; where Nd3 is the refractive index of the third lens material.

[0014] The above-mentioned glass-plastic day-night confocal vehicle-mounted optical system satisfies the following relationship: 1.2 < H / f < 2.5; where H is the image height of the optical system and f is the total focal length of the optical system.

[0015] The above-mentioned glass-plastic day-night confocal vehicle-mounted optical system satisfies the following relationship: TTL / f < 5.5; where f is the total focal length of the optical system and TTL is the total optical length of the optical system.

[0016] In the above-mentioned glass-plastic day-night confocal vehicle-mounted optical system, the third lens is a spherical lens, and the aperture stop is located between the third lens and the fourth lens.

[0017] 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 glass-plastic day-night confocal vehicle-mounted optical system is installed in the optical lens.

[0018] Compared with the prior art, the beneficial effects of the present application are as follows: The present invention provides a glass-plastic day-night confocal vehicle-mounted optical system and an imaging module using the same, which mainly consists of seven lenses. It has the advantages of simple structure, high resolution, small size, high relative illumination, and small distortion, improving the illumination uniformity and imaging clarity of the picture. 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 glass-plastic day-night confocal vehicle-mounted lens is reduced. Description of the Drawings

[0019] 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.

[0020] Figure 1 It is a schematic structural diagram of the optical system or the imaging module in Embodiment 1 of the present application; Figure 2 It 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 It is a schematic structural diagram of the optical system or the imaging module in Embodiment 2 of the present application; Figure 4It is the field curvature curve and distortion curve of the optical system or camera module in Embodiment 2 of the present application; Figure 5 It is the structural schematic diagram of the optical system or camera module in Embodiment 3 of the present application; Figure 6 It is the field curvature curve and distortion curve of the optical system or camera module in Embodiment 3 of the present application. Detailed implementation manners

[0021] As Figure 1-6 As shown, the present application provides a vehicle-mounted optical system, which is successively composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, and a seventh lens 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, and its object side is convex; the fourth lens has a positive optical power, its object side is convex, and its image side is convex; the fifth lens has a negative optical power, its object side is concave, and its image side is concave; 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, its object side is convex, and its image side is concave.

[0022] The present invention provides a glass-plastic day-night confocal vehicle-mounted optical system and a camera module using the same. It is mainly composed of 7 lenses, with a simple structure, and has the advantages of high resolution, small size, high relative illumination, and small distortion, improving the uniformity of the picture illumination and the imaging clarity. Moreover, the head size of the lens is smaller, the field of view that can be photographed is wider, and the production cost of the glass-plastic day-night confocal vehicle-mounted lens is reduced.

[0023] Further, the optical system satisfies the following relationship: FOV ∈ [70°, 120°], 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.

[0024] Further, the optical system satisfies the following relationship: D1 / (Fno*Ymax) < 1.3, where D1 is the maximum optical effective 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 optical effective diameter of the first lens, and thus ensure the requirement for the miniaturization of the optical system.

[0025] Furthermore, the optical system satisfies the following relationships: -6.0 mm < f1 < -4.0 mm; -20.0 mm < f2 < -8.0 mm; 4.0 mm < f3 < 8.0 mm; 2.0 mm < f4 < 5.0 mm; -5.0 mm < f5 < -2.0 mm; 4.0 mm < f6 < 15.0 mm; 20.0 mm < |f7|; 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, and f7 is the effective focal length of the seventh lens. By reasonably controlling the effective focal lengths of the lenses in the optical system, the optical system can 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 incident angle of light, which is beneficial to correcting the system aberration.

[0026] Furthermore, the optical system satisfies the following relationships: -3.0 < f1 / f < -1.0; -8.0 < f2 / f < -2.5; 5.0 < f3 / f < 1.0; 0.5 < f4 / f < 2.0; -2.0 < f5 / f < -0.5; 0.5 < f6 / f < 3.0; 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, and f7 is the effective focal length of the seventh lens. By limiting the ratio of the effective focal lengths of each lens to the effective focal length of the optical system, the optical system can obtain a reasonable light deflection angle, effectively reduce the sensitivity of component tolerances, and improve the system aberration.

[0027] Furthermore, the optical system satisfies the following relationships: -5.0 < R13 / f < -0.5; 0.2 < R14 / f < 2.0; -3.0 < R13 / R14 < -0.5; where R13 is the object-side curvature of the seventh lens and R14 is the image-side curvature of the seventh lens, and f is the total focal length of the optical system. By controlling the curvature and ratio of the image side and object side of the seventh lens, the aberration generated by the front group of lenses can be significantly corrected, achieving better resolution ability and high resolution.

[0028] Furthermore, the optical system satisfies the following relationship: 1.0 < R1 / f < 2.0; where R1 is the object-side curvature of the first lens and f is the total focal length of the optical system. Without changing the focal length, by controlling the object-side curvature of the first lens, the distortion of the lens can be effectively controlled, achieving smaller distortion.

[0029] Furthermore, 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 refractive index of the lens material helps to make the light rays smoother, effectively reducing the primary aberration and various higher-order aberrations generated by the optical system, which is beneficial to achieving high resolution.

[0030] Furthermore, the optical system satisfies the following relationship: 1.2 < H / f < 2.5; 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.

[0031] Furthermore, the optical system satisfies the following relationship: TTL / f < 5.5; where TTL is the total optical length of the optical system and f is the total focal length of the optical system. The limitation of the ratio of the total optical length of the optical system 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.

[0032] Embodiment 1 The following refers to Figures 1 to 2 Describe the optical imaging lens according to Embodiment 1 of the present application. Figure 1 The structural schematic diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0033] As Figure 1 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, a STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an imaging surface S17.

[0034] 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 convex. The fourth lens E4 has a positive optical power, its object side surface S8 is convex, and its image side surface S9 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is concave, and its image side surface S10 is concave. 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 negative optical power, its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0035] Table 1 shows the surface type, radius of curvature, thickness, and material of each lens of the optical imaging lens of Embodiment 1. Here, the units of the radius of curvature and thickness are both millimeters (mm).

[0036] Table 1

[0037] In Table 1, for the first lens E1, the second lens E2, the fourth lens E4, the fifth lens E5, the sixth lens E6, and the seventh lens E7, both the object side and the image side are aspherical surfaces. The surface profiles of the aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0038] where x is the distance from a 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 high-order term coefficients A4, A6, A8, A10, A12, A14, and A16 of each aspherical surface that can be used in the first embodiment.

[0039] Table 2

[0040] Figure 2 Shows the field curvature curve and distortion curve of the optical imaging lens of Embodiment 1. The optical imaging lens given in Embodiment 1 can achieve good imaging quality.

[0041] 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.

[0042] 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, and an imaging surface S17.

[0043] The first lens E1 has a negative optical power, its object side S1 is convex, and its image side S2 is concave. The second lens E2 has a negative optical power, its object side S3 is concave, and its image side S4 is convex. The third lens E3 has a positive optical power, its object side S5 is convex, and its image side S6 is concave. The fourth lens E4 has a positive optical power, its object side S8 is convex, and its image side S9 is convex. The fifth lens E5 has a negative optical power, its object side S9 is concave, and its image side S10 is concave. The sixth lens E6 has a positive optical power, its object side S11 is convex, and its image side S12 is convex. The seventh lens E7 has a negative optical power, its object side S13 is convex, and its image side S14 is concave. The filter E8 has an object side S15 and an image side S16. The light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0044] Table 3 shows the surface types, radii of curvature, thicknesses, and materials of the lenses of the optical imaging lens according to Embodiment 2, where the units of the radii of curvature and thicknesses are both millimeters (mm).

[0045] Table 3

[0046] In Table 3, the object sides and image sides of the first lens E1, the second lens E2, the fourth lens E4, the fifth lens E5, the sixth lens E6, and the seventh lens E7 are all aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0047] 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.

[0048] Table 4

[0049] Figure 4 Shows the field curvature curve and distortion curve of the optical imaging lens according to Embodiment 2. The optical imaging lens given in Embodiment 2 can achieve good imaging quality.

[0050] Embodiment 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.

[0051] As shown Figure 5 in FIG. 1, 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, an STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an imaging surface S17.

[0052] 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 positive optical power, its object side surface S8 is convex, and its image side surface S9 is convex. The fifth lens E5 has a negative optical power, its object side surface S9 is concave, and its image side surface S10 is concave. 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 convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through the surfaces S1 to S16 and finally forms an image on the imaging surface S17.

[0053] 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).

[0054] Table 5

[0055] In Table 5, the object side surfaces and image side surfaces of the first lens E1, the second lens E2, the fourth lens E4, the fifth lens E5, the sixth lens E6, and the seventh lens E7 are all aspherical surfaces, and the surface profiles of the aspherical lenses can be defined by, but are not limited to, the following aspherical formula:

[0056] 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.

[0057] Table 6

[0058] In Examples 1-3, the basic data is as follows: Table 7

[0059] In Examples 1-3, each conditional expression satisfies the conditions in the following table: Table 8

[0060] A camera module includes at least an optical lens, in which the above-mentioned plastic and glass day-night confocal vehicle-mounted optical system is installed. It has a simple structure, and has advantages such as high resolution, small size, high relative illumination, and small distortion, improves the uniformity of picture illumination and imaging clarity, and has a smaller head size of the lens, can shoot a wider field of view, and reduces the production cost of the plastic and glass day-night confocal vehicle-mounted lens.

[0061] 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 make several technical deductions or replacements under the premise of the inventive concept of the present invention, should be regarded as the protection scope of the present invention.

Claims

1. A glass-plastic day-night confocal vehicle-mounted optical system, which is composed of a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh 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, and its object side surface is convex; The fourth lens has positive refractive power, its object side surface is convex, and its image side surface is convex; The fifth lens has negative optical power, its object side surface is concave, and its image side surface is concave; 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 optical power, its object side surface is convex, and its image side surface is concave; The optical system satisfies the following relationship: -6.0 mm< f1 < -4.0 mm; -20.0mm < f2 <-8.0mm; 4.0mm < f3 < 8.0mm; 2.0mm < f4 <5.0mm; -5.0mm < f5 < -2.0mm; 4.0mm < f6 < 15.0mm; 20.0mm < |f7|; 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, and f7 is the effective focal length of the seventh lens.

2. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: -3.0 < f1 / f < -1.0; -8.0 < f2 / f < -2.5; 5.0 < f3 / f < 1.0; 0.5 < f4 / f < 2.0; -2.0 < f5 / f < -0.5; 0.5 < f6 / f < 3.0; 5.0 < |f7 / f| 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, and f7 is the effective focal length of the seventh lens.

3. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The full field of view FOV∈[70°, 120°] of the optical system, and the total length TTL of the optical system ≤ 14.4 mm.

4. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: D1 / (Fno*Ymax) < 1.3; 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 glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: -5.0 < R13 / f < -0.5; 0.2 < R14 / f < 2.0; -3.0 < R13 / R14 < -0.5; Wherein, R13 is the object-side curvature of the seventh lens, R14 is the image-side curvature of the seventh lens, and f is the total focal length of the optical system.

6. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 1.0 < R1 / f < 2.0; Wherein, R1 is the object curvature of the first lens, and f is the total focal length of the optical system.

7. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: Nd3 < 1.95, where Nd3 is the refractive index of the third lens material; and / or The third lens is a spherical lens.

8. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: 1.2 < H / f < 2.5; Wherein, H is the image height of the optical system, and f is the total focal length of the optical system.

9. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: The optical system satisfies the following relationship: TTL / f < 5.5; Wherein, f is the total focal length of the optical system, and TTL is the total optical length of the optical system.

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

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