All-glass vehicle-mounted day and night confocal optical system and application camera module thereof

Abstract

This invention provides an all-glass vehicle-mounted day and night confocal optical system and its application camera module, mainly composed of 8 lenses. The first lens has negative optical power, a convex object side, and a concave image side; the second lens has negative optical power, a concave object side, and a convex image side; the third lens has positive optical power, a convex object side, and a concave image side; the fourth lens has negative optical power, a convex object side, and a concave image side; the fifth lens has positive optical power, a convex object side, and a convex image side; the fourth and fifth lenses form a bonded lens; the sixth lens has positive optical power, a convex object side, and a convex image side; the seventh lens has negative optical power and a concave image side; and the eighth lens has optical power and a concave image side. The structure is simple and has advantages such as high resolution, large target area, small size, high relative illumination, and high pixel imaging, improving the uniformity of image illumination and image clarity.

Description

Technical Field

[0001] This application relates to the field of optical imaging, and in particular to an all-glass automotive day and night confocal optical system and its application camera module. Background Technology

[0002] In recent years, with the continuous development of intelligent driving technology and the proliferation of in-vehicle applications, automotive lenses, as core components of intelligent driving systems, are crucial to the safety of vehicles using such systems. As people's demands for lens image quality increase, large apertures have become a trend in photographic lens products because small aperture lenses cannot fully meet the shooting needs in low-light environments. Currently, a series of large aperture lenses have appeared on the market, but large aperture medium-telephoto lenses are relatively few, and lenses that can simultaneously satisfy large aperture and infrared confocal focus are even rarer. Therefore, there is an urgent need to design a medium-telephoto lens that can simultaneously satisfy large aperture and infrared confocal focus to meet market demand. Summary of the Invention

[0003] This application aims to provide an all-glass vehicle-mounted day and night confocal optical system with the advantages of high pixel count and high resolution design, compact structure, easy processing and installation, and further improves the imaging effect of the equipment used with the system.

[0004] A fully glass vehicle-mounted day and night confocal optical system comprises, along the optical axis from the object plane to the image plane, a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens.

[0005] The first lens has negative optical power, its object side is convex, and its image side is concave.

[0006] The second lens has negative optical power, its object side is concave, and its image side is convex.

[0007] The third lens has positive optical power, its object side is convex, and its image side is concave.

[0008] The fourth lens has negative optical power, its object side is convex, and its image side is concave.

[0009] The fifth lens has positive optical power, and its object side is convex, and its image side is convex.

[0010] The fourth lens and the fifth lens constitute an adhesive lens;

[0011] The sixth lens has positive optical power, and its object side is convex, and its image side is convex.

[0012] The seventh lens has negative optical power and its image-side surface is concave.

[0013] The eighth lens has a focal power, and its image side is concave.

[0014] For the all-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 optical system length TTL ≤ 30 mm.

[0015] 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.

[0016] For the all-glass vehicle-mounted day-night confocal optical system as described above, 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; 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.

[0017] For the all-glass vehicle-mounted day-night confocal optical system as described above, 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; 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.

[0018] 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.

[0019] The all-glass vehicle-mounted day-night confocal optical system as described above 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.

[0020] The all-glass vehicle-mounted day-night confocal optical system as described above satisfies the following relationship: Nd3 < 1.95; where Nd3 is the refractive index of the third lens material.

[0021] 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.

[0022] The all-glass vehicle-mounted day-night confocal optical system as described above satisfies the following relationship: TTL / f < 5;

[0023] where f is the total focal length of the optical system and TTL is the total optical length of the optical system.

[0024] 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.

[0025] On the other hand, the embodiment of the present application also provides an imaging module, which at least includes an optical lens, and the above all-glass vehicle-mounted day-night confocal optical system is installed in the optical lens.

[0026] Compared with the prior art, the beneficial effects of the present application are as follows:

[0027] The present invention provides an all-glass vehicle-mounted day-night confocal optical system and an imaging module to which it is applied, which is mainly composed of 8 lenses, has a simple structure, and has the advantages of high resolution, large target surface, small volume, high relative illumination, and high-pixel imaging, improves the illumination uniformity and imaging clarity of the picture, and has a smaller head size of the lens, can shoot a wider field of view, and reduces the production cost of the day-night confocal vehicle-mounted lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] Figure 1 It is a schematic structural diagram of the optical system or imaging module in Embodiment 1 of the present application;

[0030] Figure 2 It is the field curvature curve and distortion curve of the optical system or imaging module in Embodiment 1 of the present application;

[0031] Figure 3 This is a schematic diagram of the structure of the optical system or camera module in Embodiment 2 of this application;

[0032] Figure 4 The field curvature curve and distortion curve of the optical system or camera module in Embodiment 2 of this application;

[0033] Figure 5 This is a schematic diagram of the structure of the optical system or camera module in Embodiment 3 of this application;

[0034] Figure 6 These are the field curvature curves and distortion curves of the optical system or camera module in Embodiment 3 of this application. Detailed Implementation

[0035] like Figure 1-6 As shown, this application provides an all-glass automotive day-night confocal optical system, which consists of a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens sequentially along the optical axis from the object plane to the image plane. 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 optical 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 optical power, its object-side surface is convex, and its image-side surface is convex. The fourth and fifth lenses form a bonded lens. The sixth lens has positive optical 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.

[0036] This invention provides an all-glass vehicle-mounted day and night confocal optical system and its application camera module, which is mainly composed of 8 lenses. It has a simple structure and has the advantages of high resolution, large target surface, small size, high relative illumination and high pixel imaging. It improves the uniformity of illumination and image clarity. Moreover, the lens head size is smaller, and the field of view can be wider, which reduces the production cost of day and night confocal vehicle-mounted lenses.

[0037] Furthermore, the optical system satisfies the following relationship: FOV∈[100°, 200°], where FOV is the maximum field of view of the optical system. The design of the large field of view of the optical system effectively meets the actual needs of the optical system.

[0038] 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.

[0039] Furthermore, 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. The reasonable control of the effective focal lengths of each lens in the optical system can enable the optical system to satisfy a large field angle while restricting the effective diameter of the components, controlling the overall size of the optical system, and adjusting the light incident angle, which is beneficial to correcting the system aberration.

[0040] Furthermore, 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 reduce the sensitivity of component tolerances, and improve the system aberration.

[0041] 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, 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.

[0042] Further, the optical system satisfies the following relationship: Nd3 < 1.95; where Nd3 is the refractive index of the material of the third lens; 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.

[0043] 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.

[0044] 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 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.

[0045] Embodiment 1

[0046] The following refers to Figures 1 to 2 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.

[0047] 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, 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.

[0048] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S8 being convex and its image-side surface S9 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being concave and its image-side surface S14 being concave. The eighth lens E8 has positive optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0049] Table 1 shows the surface type, radius of curvature, thickness, and material of each lens in the optical imaging lens of Example 1, wherein the units for radius of curvature and thickness are millimeters (mm).

[0050] Table 1

[0051]

[0052] In Table 1, the object-side surface and image-side surface of the sixth lens E6 and the eighth lens E8 are both aspherical. The surface shape of their aspherical lenses can be defined using, but is not limited to, the following aspherical formula:

[0053]

[0054] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. Table 2 gives the conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 for each aspherical surface that can be used in the first embodiment.

[0055] Table 2

[0056]

[0057] Figure 2 The field curvature and distortion curves of the optical imaging lens of Example 1 are shown. The optical imaging lens given in Example 1 can achieve good imaging quality.

[0058] Example 2

[0059] The following is for reference Figures 3 to 4Describes an optical imaging lens according to Embodiment 2 of this application. Figure 3 A schematic diagram of the structure of an optical imaging lens according to Embodiment 2 of this application is shown.

[0060] like Figure 3 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence 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, an eighth lens E8, and an imaging plane S19.

[0061] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S4 being convex and its image-side surface S5 being concave. The fourth lens E4 has negative optical power, with its object-side surface S8 being convex and its image-side surface S9 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has positive optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has positive optical power, with its object-side surface S15 being convex and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0062] Table 3 shows the surface type, radius of curvature, thickness, and material of each lens in the optical imaging lens of Example 2, wherein the units for radius of curvature and thickness are millimeters (mm).

[0063] Table 3

[0064]

[0065] In Table 3, the object-side surface and image-side surface of the sixth lens E6 and the eighth lens E8 are both aspherical. The surface shape of their aspherical lenses can be defined using, but is not limited to, the following aspherical formulas:

[0066]

[0067] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. Table 4 gives the conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 for each aspherical surface that can be used in the second embodiment.

[0068] Table 4

[0069]

[0070] Figure 4 The field curvature and distortion curves of the optical imaging lens of Example 2 are shown. The optical imaging lens given in Example 2 can achieve good imaging quality.

[0071] Example 3

[0072] The following is for reference Figures 5 to 6 Describes an optical imaging lens according to Embodiment 3 of this application. Figure 5 A schematic diagram of the structure of an optical imaging lens according to Embodiment 3 of this application is shown.

[0073] like Figure 5 As shown, the optical imaging lens according to an exemplary embodiment of this application includes, in sequence 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, an eighth lens E8, and an imaging plane S19.

[0074] The first lens E1 has negative optical power, with its object-side surface S1 being convex and its image-side surface S2 being concave. The second lens E2 has negative optical power, with its object-side surface S3 being concave and its image-side surface S4 being convex. The third lens E3 has positive optical power, with its object-side surface S5 being convex and its image-side surface S6 being concave. The fourth lens E4 has negative optical power, with its object-side surface S8 being convex and its image-side surface S9 being concave. The fifth lens E5 has positive optical power, with its object-side surface S9 being convex and its image-side surface S10 being convex. The sixth lens E6 has positive optical power, with its object-side surface S11 being convex and its image-side surface S12 being convex. The seventh lens E7 has negative optical power, with its object-side surface S13 being convex and its image-side surface S14 being concave. The eighth lens E8 has negative optical power, with its object-side surface S15 being concave and its image-side surface S16 being concave. The filter E9 has an object-side surface S17 and an image-side surface S18. Light from the object passes sequentially through each surface S1 to S18 and is finally imaged onto the imaging surface S19.

[0075] Table 5 shows the surface type, radius of curvature, thickness, and material of each lens in the optical imaging lens of Example 3, wherein the units for radius of curvature and thickness are millimeters (mm).

[0076] Table 5

[0077]

[0078] In Table 5, the object-side surface and image-side surface of the sixth lens E6 and the eighth lens E8 are both aspherical. The surface shape of their aspherical lenses can be defined using, but is not limited to, the following aspherical formulas:

[0079]

[0080] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. Table 6 gives the conic coefficients and higher-order term coefficients A4, A6, A8, A10, A12, A14, and A16 that can be used for each aspherical surface in the third embodiment.

[0081] Table 6

[0082]

[0083] In Examples 1-3, the basic data is as follows:

[0084] Table 7

[0085]

[0086] In Examples 1-3, each conditional expression satisfies the conditions in the table below:

[0087] Table 8

[0088]

[0089] A camera module includes at least an optical lens, in which the aforementioned all-glass vehicle-mounted day and night confocal optical system is installed. It has a simple structure and advantages such as high resolution, large target surface, small size, high relative illumination and high pixel imaging, which improves the uniformity of illumination and image clarity. In addition, the lens head is smaller, which allows for a wider field of view and reduces the production cost of the day and night confocal vehicle-mounted lens.

[0090] The above description provides one or more embodiments in conjunction with specific content, and does not imply that the specific implementation of the present invention is limited to these descriptions. Any methods or structures that are similar to or identical to those of the present invention, or any technical deductions or substitutions made based on the concept of the present invention, should be considered within the scope of protection of the present invention.

Claims

1. An all-glass vehicle-mounted day-night confocal optical system, comprising, along the optical axis from the object plane to the image plane, a first lens, a second lens, a third lens, an aperture stop, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens, characterized in that: The first lens has negative optical power, its object side is convex, and its image side is concave. The second lens has negative optical power, its object side is concave, and its image side is convex. The third lens has positive optical power, its object side is convex, and its image side is concave. The fourth lens has negative optical power, its object side is convex, and its image side is concave. The fifth lens has positive optical power, and its object side is convex, and its image side is convex. The fourth lens and the fifth lens constitute an adhesive lens; The sixth lens has positive optical power, and its object side is convex, and its image side is convex. The seventh lens has negative optical power, and its object side is concave, as is its image side. The eighth lens has positive optical power, its object side is convex, and its image side is concave. The optical system satisfies the following relationship: f1 = -9.74061 mm; f2 = -36.7642 mm; f3 = 17.96340 mm; f4 = -11.354mm; f5 = 6.158686 mm; f6 = 8.834868 mm; f7 = -7.07893 mm; f8 = 24.10452 mm; 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.

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: f1 / f = -1.47899 f2 / f = -5.58218 f3 / f = 2.727513 f4 / f = -1.72396 f5 / f = 0.935118 f6 / f = 1.341462 f7 / f = -1.07484 f8 / f = 3.659964 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 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 optical system satisfies the following relationship: D1 / (Fno*Ymax) = 0.660254; 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.

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: R3 / f = -1.38476; R1 / f = 6.617067; 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.

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: H / f = 0.701944; Where H is the image height of the optical system 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: TTL / f = 4.555117; Where f is the total focal length of the optical system, and TTL is the total optical length of the optical system.

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

8. 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 as described in any one of claims 1-7.

Images