A glass-plastic day and night confocal vehicle-mounted optical system and an application camera module thereof

Abstract

The application provides a glass-plastic day and night confocal vehicle-mounted optical system and an application camera module thereof, which is mainly composed of seven lenses, wherein the first lens has negative focal power, the object side is a convex surface, and the image side is a concave surface; the second lens has negative focal power, the object side is a concave surface, and the image side is a convex surface; the third lens has positive focal power, and the side is a convex surface; the fourth lens has negative focal power, the object side is a convex surface, and the image side is a concave surface; the fifth lens has positive focal power, the object side is a convex surface, and the image side is a convex surface; the sixth lens has positive focal power, the object side is a convex surface, and the image side is a convex surface; and the seventh lens has focal power, the object side is a convex surface, and the image side is a concave surface. The application has the advantages of simple structure, high resolving power, small volume, high relative luminance, small distortion, improved picture luminance uniformity and imaging clarity, smaller head size of the lens, wider shooting field range, and reduced production cost of the glass-plastic day and night confocal vehicle-mounted lens.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical imaging, in particular to a glass-plastic day and night confocal vehicle-mounted optical system and an application thereof. BACKGROUND

[0002] In recent years, intelligent driving technology has been developing rapidly, and vehicle-mounted applications have been emerging in an endless stream. As a core and key component of the intelligent driving system, the vehicle-mounted lens is related to the safety of vehicles using the intelligent driving system. People have higher demands for high-pixel and high-resolution lenses. In addition, since the day and night confocal lens is generally arranged in front of the driver's seat, it is particularly important to miniaturize the small front end in order to better hide the lens.

[0003] Therefore, it is urgent to design a medium-long focal length lens that can simultaneously meet the requirements of small distortion, miniaturization and infrared confocal to meet market demand. SUMMARY

[0004] The present application aims to provide a glass-plastic day and night confocal vehicle-mounted optical system with the advantages of high pixel and high resolution design, compact structure, easy processing and installation, and further improved imaging effect of the equipment matched with the system.

[0005] A glass-plastic day and 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 from an object plane to an image plane along an optical axis.

[0006] The first lens has a negative focal power, and its object side surface is convex and its image side surface is concave.

[0007] The second lens has a negative focal power, and its object side surface is concave and its image side surface is convex.

[0008] The third lens has a positive focal power, and its object side surface is convex.

[0009] The fourth lens has a negative focal power, and its object side surface is convex and its image side surface is concave.

[0010] The fifth lens has a positive focal power, and its object side surface is convex and its image side surface is convex.

[0011] The fourth lens and the fifth lens constitute a bonded lens.

[0012] The sixth lens has a positive focal power, and its object side surface is convex and its image side surface is convex.

[0013] The seventh lens has a focal power, and its object side surface is convex and its image side surface is concave.

[0014] The glass-plastic day and night confocal vehicle-mounted optical system as described above, wherein a full field of view FOV of the optical system satisfies FOV ∈ [70°, 120°], and a total length TTL of the optical system satisfies TTL ≤ 14.4 mm.

[0015] The glass-plastic day and night confocal vehicle-mounted optical system as described above, wherein the optical system satisfies the following relationship: D1 / (Fno*Ymax) < 1.3; wherein D1 is a maximum effective diameter of the first lens, Fno is a system aperture, and Ymax is a maximum image circle radius of the system.

[0016] The glass-plastic day and night confocal vehicle-mounted optical system as described above, wherein the optical system satisfies the following relationship: -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|; wherein f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, f3 is an effective focal length of the third lens, f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, f6 is an effective focal length of the sixth lens, and f7 is an effective focal length of the seventh lens.

[0017] The glass-plastic day and night confocal vehicle-mounted optical system as described above, wherein 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; wherein f is a focal length of the entire optical system, f1 is an effective focal length of the first lens, f2 is an effective focal length of the second lens, f3 is an effective focal length of the third lens, f4 is an effective focal length of the fourth lens, f5 is an effective focal length of the fifth lens, f6 is an effective focal length of the sixth lens, and f7 is an effective focal length of the seventh lens.

[0018] The glass-plastic day and night confocal vehicle-mounted optical system as described above, wherein the optical system satisfies the following relationship: -5.0 < R13 / f < -0.5; wherein R13 is an object-side curvature of the seventh lens, and f is a total focal length of the optical system.

[0019] The glass-plastic day and night confocal vehicle-mounted optical system as described above, wherein the optical system satisfies the following relationship: 0.2 < R14 / f < 2.0; wherein R14 is an image-side curvature of the seventh lens, and f is a total focal length of the optical system.

[0020] The glass-plastic day and night confocal vehicle-mounted optical system as described above, wherein the optical system satisfies the following relationship: 1.0 < R1 / f < 2.0; wherein R1 is an object-side curvature of the first lens, and f is a total focal length of the optical system.

[0021] The glass-plastic day and night confocal vehicle-mounted optical system as described above satisfies the following relationship: -3.0 < R13 / R14 < -0.5; wherein 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.

[0022] The glass-plastic day and night confocal vehicle-mounted optical system as described above satisfies the following relationship: Nd3 < 1.95; wherein Nd3 is the refractive index of the third lens material.

[0023] The glass-plastic day and night confocal vehicle-mounted optical system as described above 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.

[0024] The glass-plastic day and night confocal vehicle-mounted optical system as described above 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.

[0025] The glass-plastic day and night confocal vehicle-mounted optical system as described above, the third lens is a spherical lens, and the diaphragm is located between the third lens and the fourth lens.

[0026] In another aspect, the embodiment of the present application also provides a camera module, which at least comprises an optical lens, and the optical lens is internally mounted with the glass-plastic day and night confocal vehicle-mounted optical system.

[0027] Compared with the prior art, the beneficial effects of the present application are as follows:

[0028] The present application provides a glass-plastic day and night confocal vehicle-mounted optical system and a camera module using the same, which is mainly composed of seven lenses. The system has the advantages of simple structure, high resolution, small size, high relative luminance, small distortion, and the like. The system improves the uniformity of picture luminance and the clarity of imaging, and the head size of the lens is smaller, so that the system can capture a wider field of view, and the production cost of the glass-plastic day and night confocal vehicle-mounted lens is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced.

[0030] Figure 1 is a structural schematic diagram of the optical system or the camera module of the embodiment 1 of the present application;

[0031] Figure 2 is a field curvature curve and a distortion curve of the optical system or the camera module of the embodiment 1 of the present application;

[0032] Figure 3 is a structural schematic diagram of the optical system or camera module of embodiment 2 of the present application;

[0033] Figure 4 is a field curvature curve and distortion curve of the optical system or camera module of embodiment 2 of the present application;

[0034] Figure 5 is a structural schematic diagram of the optical system or camera module of embodiment 3 of the present application;

[0035] Figure 6 is a field curvature curve and distortion curve of the optical system or camera module of embodiment 3 of the present application. DETAILED DESCRIPTION

[0036] As shown in Figures 1-6 The present application provides a vehicle-mounted 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 and a seventh lens in sequence from an object plane to an image plane along an optical axis; the first lens has a negative focal power, and its object side surface is a convex surface and its image side surface is a concave surface; the second lens has a negative focal power, and its object side surface is a concave surface and its image side surface is a convex surface; the third lens has a positive focal power, and its object side surface is a convex surface; the fourth lens has a positive focal power, and its object side surface is a convex surface and its image side surface is a convex surface; the fifth lens has a negative focal power, and its object side surface is a concave surface and its image side surface is a concave surface; the fourth lens and the fifth lens constitute a bonded lens; the sixth lens has a positive focal power, and its object side surface is a convex surface and its image side surface is a convex surface; and the seventh lens has a negative focal power, and its object side surface is a convex surface and its image side surface is a concave surface.

[0037] The present application provides a glass-plastic day and night confocal vehicle-mounted optical system and a camera module using the same, which is mainly composed of seven lenses. The system has the advantages of simple structure, high resolution, small size, high relative luminance and small distortion, improves the uniformity of picture luminance and the definition of imaging, and has a smaller head size, a wider field of view and a lower production cost.

[0038] Further, the optical system satisfies the following relationship: FOV [70°, 120°], wherein FOV is the maximum field of view of the optical system, and the design of the large field of view of the optical system effectively meets the actual needs of the large field of view of the optical system.

[0039] Further, the optical system satisfies the following relationship: D1 / (Fno*Ymax)<1.3, wherein 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 of the optical imaging system and the aperture size can achieve the purpose of limiting the optical effective diameter of the first lens, and thus ensure the miniaturization of the optical system.

[0040] Further, the optical system satisfies the following relationships: -6.0mm < 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|; wherein 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. Reasonable control of the effective focal length of each lens of the optical system can make the optical system satisfy a large field angle, limit the effective diameter of the components, control the overall size of the optical system, and adjust the light incidence angle, which is conducive to correcting the system aberration.

[0041] Further, 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; 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, and f6 is the effective focal length of the sixth lens. The limitation of the ratio of the effective focal length of each lens to the effective focal length of the optical system makes the optical system obtain a reasonable light deflection angle, effectively reduces the component tolerance sensitivity, and improves the system aberration.

[0042] Further, 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; 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. By controlling the curvature and ratio of the image side of the seventh lens and the object side of the seventh lens, the aberration generated by the front group of lenses can be obviously corrected, better resolution can be achieved, and high resolution can be achieved.

[0043] Further, the optical system satisfies the following relationships: 1.0 < R1 / f < 2.0; wherein R1 is the object side curvature of the first lens, and f is the total focal length of the optical system. By controlling the object side curvature of the first lens under the condition that the focal length is unchanged, the distortion of the lens can be effectively controlled, and smaller distortion can be achieved.

[0044] Further, the optical system satisfies the following relationship: Nd3 < 1.95; wherein, Nd3 is the third lens material refractive index; the lens material refractive index and the reasonable selection, help to make light more gently, effectively reduce the primary aberration and various high-order aberration generated by the optical system, help to realize high resolution.

[0045] Further, 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. By controlling the optical system focal length and image height within a certain range, it is beneficial to improve the resolution of the entire optical imaging system, and realize high resolution.

[0046] Further, the optical system satisfies the following relationship: TTL / f < 5.5; wherein, 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 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 fixed focal length.

[0047] Embodiment one,

[0048] The following refers to Figures 1 to 2 The optical imaging lens according to Embodiment 1 of the present application is described. Figure 1 The structure diagram of the optical imaging lens according to Embodiment 1 of the present application is shown.

[0049] 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, an STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, and an imaging surface S17.

[0050] The first lens E1 has a negative focal power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a negative focal power, the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive focal power, the object side surface S5 is a convex surface, and the image side surface S6 is a convex surface. The fourth lens E4 has a positive focal power, the object side surface S8 is a convex surface, and the image side surface S9 is a convex surface. The fifth lens E5 has a negative focal power, the object side surface S9 is a concave surface, and the image side surface S10 is a concave surface. The sixth lens E6 has a positive focal power, the object side surface S11 is a convex surface, and the image side surface S12 is a convex surface. The seventh lens E7 has a negative focal power, the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from the object sequentially passes through each surface S1 to S16 and is finally imaged on the imaging surface S17.

[0051] Table 1 shows the surface type, radius of curvature, thickness and material of each lens of the optical imaging lens of Example 1, wherein the units of the radius of curvature and the thickness are millimeter (mm).

[0052] Table 1

[0053]

[0054] In Table 1, the object side surface and the image side surface 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 aspherical surfaces, and the aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0055]

[0056] wherein x is the distance from the corresponding point on the aspherical surface to the tangent plane at 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 at the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th high order term in the aspherical surface formula. Table 2 shows the conic coefficient and the high order term coefficients A4, A6, A8, A10, A12, A14 and A16 of the aspherical surfaces used in Example 1.

[0057] Table 2

[0058]

[0059] Figure 2 The field curvature curve and the distortion curve of the optical imaging lens of Example 1 are shown. The optical imaging lens of Example 1 can achieve good imaging quality.

[0060] Example Two,

[0061] The following refers to Figures 3 to 4 The optical imaging lens according to Example 2 of the present application is described. Figure 3 The structure diagram of the optical imaging lens according to Example 2 of the present application is shown.

[0062] As Figure 3 shown, the optical imaging lens according to the exemplary embodiments 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, an STO, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7 and an imaging surface S17.

[0063] The first lens E1 has negative refractive power, the object side surface S1 is convex, and the image side surface S2 is concave. The second lens E2 has negative refractive power, the object side surface S3 is concave, and the image side surface S4 is convex. The third lens E3 has positive refractive power, the object side surface S5 is convex, and the image side surface S6 is concave. The fourth lens E4 has positive refractive power, the object side surface S8 is convex, and the image side surface S9 is convex. The fifth lens E5 has negative refractive power, the object side surface S9 is concave, and the image side surface S10 is concave. The sixth lens E6 has positive refractive power, the object side surface S11 is convex, and the image side surface S12 is convex. The seventh lens E7 has negative refractive power, the object side surface S13 is convex, and the image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. Light from an object sequentially passes through the surfaces S1 to S16 and is finally imaged on an imaging surface S17.

[0064] Table 3 shows the surface type, the radius of curvature, the thickness and the material of each lens of the optical imaging lens of Example 2, wherein the units of the radius of curvature and the thickness are millimeter (mm).

[0065] Table 3

[0066]

[0067] In Table 3, the object side surface and the image side surface 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 aspherical surfaces, and the aspherical surface can be defined by, but not limited to, the following aspherical surface formula:

[0068]

[0069] wherein x is the distance from the corresponding point on the aspherical surface to the tangent plane at 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 at the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the ith high order term in the aspherical surface formula. Table 4 shows the conic coefficient and the high order term coefficients A4, A6, A8, A10, A12, A14 and A16 of each aspherical surface that can be used in Example 2.

[0070] Table 4

[0071]

[0072] Figure 4 The field curvature curve and the distortion curve of the optical imaging lens of Example 2 are shown. The optical imaging lens of Example 2 can achieve good imaging quality.

[0073] Example Three,

[0074] The following refers to Figures 5 to 6An optical imaging lens according to Embodiment 3 of the present application is described. Figure 5 A structural diagram of an optical imaging lens according to Embodiment 3 of the present application is shown.

[0075] As shown in Figure 5 An optical imaging lens according to an exemplary embodiment of the present application includes, in order 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.

[0076] The first lens E1 has a negative focal power, the object side surface S1 is a convex surface, and the image side surface S2 is a concave surface. The second lens E2 has a negative focal power, the object side surface S3 is a concave surface, and the image side surface S4 is a convex surface. The third lens E3 has a positive focal power, the object side surface S5 is a convex surface, and the image side surface S6 is a concave surface. The fourth lens E4 has a positive focal power, the object side surface S8 is a convex surface, and the image side surface S9 is a convex surface. The fifth lens E5 has a negative focal power, the object side surface S9 is a concave surface, and the image side surface S10 is a concave surface. The sixth lens E6 has a positive focal power, the object side surface S11 is a convex surface, and the image side surface S12 is a convex surface. The seventh lens E7 has a positive focal power, the object side surface S13 is a convex surface, and the image side surface S14 is a concave surface. The filter E8 has an object side surface S15 and an image side surface S16. Light from an object passes through the surfaces S1 to S16 in order and is finally imaged on the imaging surface S17.

[0077] Table 5 shows the surface type, the radius of curvature, the thickness, and the material of each lens of the optical imaging lens of Embodiment 3, wherein the units of the radius of curvature and the thickness are millimeters (mm).

[0078] Table 5

[0079]

[0080] In Table 5, the object side surface and the image side surface 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 aspherical surfaces, and the aspherical surface can be defined by, but is not limited to, the following aspherical surface formula:

[0081]

[0082] wherein x is the distance from a corresponding point on the aspherical surface to a 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 conic coefficient, and Ai is the coefficient corresponding to the i-th high order term in the aspherical surface formula. Table 6 shows the conic coefficient and the high order term coefficients A4, A6, A8, A10, A12, A14, and A16 of each aspherical surface that can be used in Embodiment 3.

[0083] Table 6

[0084]

[0085] In Examples 1-3, the base data is as follows:

[0086] Table 7

[0087]

[0088] In Examples 1-3, each conditional expression satisfies the conditions of the following table:

[0089] Table 8

[0090]

[0091] A camera module at least includes an optical lens, and the optical lens is installed with the above-mentioned glass-plastic day and night confocal vehicle optical system, which has the advantages of simple structure, high resolution, small volume, high relative luminance and small distortion, improves the uniformity of picture luminance and the clarity of imaging, and the head size of the lens is smaller, the field of view can be wider, and the production cost of the glass-plastic day and night confocal vehicle lens is reduced.

[0092] The above is one or more embodiments provided in combination with specific content, and it is not intended that the specific implementation of the present application is limited to these descriptions. Any approximation, similarity, or replacement of the method, structure, etc. of the present application, or any technical deduction or replacement made under the premise of the concept of the present application, should be considered as the protection scope of the present application.

Claims

1. A glass-plastic day and night confocal vehicle-mounted optical system, sequentially comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object plane to an image plane along an optical axis, characterized in that: the first lens has a negative focal power, and a convex object side surface and a concave image side surface; the second lens has a negative focal power, and a concave object side surface and a convex image side surface; the third lens has a positive focal power, and a convex object side surface; the fourth lens has a positive focal power, and a convex object side surface and a convex image side surface; the fifth lens has a negative focal power, and a concave object side surface and a concave image side surface; the fourth lens and the fifth lens form a bonded lens; the sixth lens has a positive focal power, and a convex object side surface and a convex image side surface; the seventh lens has a focal power, and a convex object side surface and a concave image side surface; the optical system satisfies the following relationships: D1 / (Fno*Ymax) < 1.3; -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|; wherein D1 is the maximum effective diameter of the first lens, Fno is the system aperture, Ymax is the maximum image circle radius of the 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. 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; 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. the full field of view FOV of the optical system is in the range of [70°, 120°], and the total length TTL of the optical system is less than or equal to 14.4 mm. 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; 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. the optical system satisfies the following relationships: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The glass-plastic day-night confocal vehicle-mounted optical system according to claim 1, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ 3. The glass-plastic all-day confocal vehicle-mounted optical system according to claim 1, characterized in that: ​ 4. The glass-plastic all-day confocal vehicle-mounted optical system according to claim 1, characterized in that: ​ ​ ​ ​ ​ 5. The glass-plastic all-day confocal vehicle-mounted optical system according to claim 1, characterized in that: ​ 1.0 < R1 / f < 2.0; wherein R1 is the object side curvature of the first lens, and f is the total focal length of the optical system.

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

7. The glass-plastic all-day confocal automotive 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.

8. The glass-plastic all-day confocal automotive 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.

9. An image capturing module comprising at least an optical lens, characterized in that: The optical lens is internally installed with the glass-plastic day and night confocal vehicle-mounted optical system according to any one of claims 1-8.

Images