Vehicle-mounted landscape lens

Abstract

The invention discloses a vehicle-mounted landscape lens, and belongs to the technical field of vehicle-mounted lenses, the vehicle-mounted landscape lens comprises an optical assembly and a lens barrel, and the optical assembly comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens which are sequentially arranged from left to right along a light incident light path; the first lens is a meniscus negative lens, the second lens is a negative lens, the third lens has positive focal power, the fourth lens is a positive lens, the fifth lens is a biconvex positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a biconvex positive lens, the eighth lens is a color filter, the ninth lens is protective glass, and the outer side of the image surface of the protective glass is a lens imaging surface. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are all fixedly installed in the lens barrel. The vehicle-mounted landscape lens structure has the effect of improving the stability of the vehicle-mounted landscape lens structure while ensuring the reliable performance of the vehicle-mounted landscape lens.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted lenses, and more particularly to a vehicle-mounted landscape lens. Background Art

[0002] With the continuous progress of intelligent driving technology, the application of vehicle-mounted cameras has expanded from single safety monitoring to enhancing driving experience and convenience. These cameras can not only capture the scenery during the journey at high resolution to provide basic data for the driving assistance system, but also provide complete out-of-vehicle environment information through a 360° panoramic surround view system to enhance driving safety.

[0003] The materials of existing vehicle-mounted landscape lenses are usually a combination of glass and plastic or all glass to ensure optical imaging stability under extreme temperatures or rapid temperature changes. With the continuous progress of technology, while pursuing higher imaging quality, vehicle-mounted landscape lenses are also pursuing miniaturization and thinness, and at this time, the structural stability and performance reliability of vehicle-mounted landscape lenses are challenged.

[0004] In view of the above related technologies, it is urgent to design and develop a vehicle-mounted landscape lens that improves the structural stability of the vehicle-mounted landscape lens while ensuring reliable performance. Summary of the Invention

[0005] In order to improve the structural stability of a vehicle-mounted landscape lens, the present application provides a vehicle-mounted landscape lens.

[0006] The vehicle-mounted landscape lens provided by the present application adopts the following technical solutions: A vehicle-mounted landscape lens includes an optical component and a lens barrel. The optical component includes a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens arranged in sequence from left to right along the light incident optical path. The first lens is a meniscus negative lens, the second lens is a negative lens, the third lens has a positive optical power, the fourth lens is a positive lens, the fifth lens is a biconvex positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a biconvex positive lens, the eighth lens is a color filter, and the ninth lens is a protective glass. The outside of the image plane of the protective glass is the lens imaging plane. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all fixedly installed in the lens barrel.

[0007] By adopting the above technical solution, the first lens, the second lens, the third lens, the fourth lens, the aperture stop, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens are sequentially arranged from left to right along the light incident optical path; the first lens is a meniscus negative lens, the second lens is a negative lens, the third lens has a positive optical power, the fourth lens is a positive lens, the fifth lens is a biconvex positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a biconvex positive lens, the eighth lens is a color filter, and the ninth lens is a protective glass. The outside of the image plane of the protective glass is the lens imaging plane. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all fixedly installed in the lens barrel. The first lens, the second lens, the third lens, the fourth lens, the aperture stop, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens ensure the performance of the vehicle-mounted landscape lens, and the lens barrel can improve the structural stability of the vehicle-mounted landscape lens.

[0008] Preferably, the lens barrel includes a first barrel body, a second barrel body, a third barrel body, and a fourth barrel body that are sequentially arranged from left to right along the light incident optical path. The first barrel body includes a first barrel ring connected to the second barrel body, a second barrel ring connected to the first barrel ring, and a third barrel ring connected to the second barrel ring. A lens cap is sleeved outside the third barrel ring. The lens cap includes a first cap ring connected to the third barrel ring and a second cap ring connected to the first cap ring. A first sealing ring is arranged between the second cap ring and the third barrel ring. The first sealing ring is coaxially arranged with the third barrel ring, and the first sealing ring is coaxially arranged with the second cap ring.

[0009] By adopting the above technical solution, the lens barrel includes a first barrel body, a second barrel body, a third barrel body, and a fourth barrel body that are sequentially arranged from left to right along the light incident optical path. The first barrel body includes a first barrel ring connected to the second barrel body, a second barrel ring connected to the first barrel ring, and a third barrel ring connected to the second barrel ring. A lens cap is sleeved outside the third barrel ring. The lens cap includes a first cap ring connected to the third barrel ring and a second cap ring connected to the first cap ring. A first sealing ring is arranged between the second cap ring and the third barrel ring. The first sealing ring is coaxially arranged with the third barrel ring, and the first sealing ring is coaxially arranged with the second cap ring, which improves the connection stability between the lens barrel and the lens cap.

[0010] Preferably, a barb ring is arranged on the side of the first cap ring away from the first sealing ring. The barb ring is connected to the second cap ring and is coaxially arranged with the second cap ring. The first lens is arranged inside the barb ring, and the first lens is in close contact with the inner side surface of the barb ring. The side surface of the first lens close to the third barrel ring is in close contact with the side surface of the second barrel ring. A second sealing ring is arranged between the first lens and the second barrel ring.

[0011] By adopting the above technical solution, a barb ring is provided on the side of the first cap ring away from the first sealing ring. The barb ring is connected to the second cap ring and is coaxially arranged with the second cap ring. The first lens is arranged inside the barb ring and is in close contact with the inner side surface of the barb ring. The side surface of the first lens close to the third cylinder ring is in close contact with the side surface of the second cylinder ring. A second sealing ring is arranged between the first lens and the second cylinder ring, improving the clamping stability between the first lens, the lens cap and the lens barrel.

[0012] Preferably, the second lens, the third lens and the fourth lens are arranged inside the first cylinder ring. The side surface of the second lens close to the first lens is in close contact with the first lens. The side surface of the third lens close to the second lens is in close contact with the second lens. A first snap ring is arranged between the third lens and the fourth lens. The fifth lens is arranged inside the third cylinder body. A second snap ring is arranged between the fourth lens and the fifth lens. The second snap ring is arranged inside the second cylinder body. The sixth lens, the seventh lens and the eighth lens are arranged inside the fourth cylinder body. The sixth lens is in close contact with the fifth lens. A third snap ring is arranged between the sixth lens and the seventh lens. A step is arranged inside the fourth cylinder body. The seventh lens and the eighth lens are located on both sides of the step.

[0013] By adopting the above technical solution, the second lens, the third lens and the fourth lens are arranged inside the first cylinder ring. The side surface of the second lens close to the first lens is in close contact with the first lens. The side surface of the third lens close to the second lens is in close contact with the second lens. A first snap ring is arranged between the third lens and the fourth lens. The fifth lens is arranged inside the third cylinder body. A second snap ring is arranged between the fourth lens and the fifth lens. The second snap ring is arranged inside the second cylinder body. The sixth lens, the seventh lens and the eighth lens are arranged inside the fourth cylinder body. The sixth lens is in close contact with the fifth lens. A third snap ring is arranged between the sixth lens and the seventh lens. A step is arranged inside the fourth cylinder body. The seventh lens and the eighth lens are located on both sides of the step, improving the connection stability between the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the lens barrel.

[0014] Preferably, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens are glass mirror surfaces.

[0015] By adopting the above technical solution, the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are glass lenses. Compared with the common glass-plastic hybrid lens, the lens design of the present invention uses glass and glass aspherical surfaces. The glass material has higher heat resistance and impact resistance, and can maintain the stability of optical imaging under extreme temperatures or rapid temperature differences, effectively avoiding problems such as deformation and aging that may occur to plastic lenses in high or low temperature environments, extending the service life of the lens, and ensuring the reliability and stability of the lens in various complex environments.

[0016] Preferably, the fifth lens and the sixth lens are adhesively bonded to form an adhesive lens group, and the side of the fifth lens close to the aperture stop is in close contact with the aperture stop.

[0017] By adopting the above technical solution, the fifth lens and the sixth lens are adhesively bonded to form an adhesive lens group, and the side of the fifth lens close to the aperture stop is in close contact with the aperture stop. The aperture stop can effectively block non-imaging light from entering the optical component, reduce the interference of stray light, accurately control the incident angle and the light passing aperture of the light, thereby reducing the generation of ghost stray light and optimizing the imaging quality.

[0018] Preferably, the focal length of the optical component is f, and the focal lengths of the first lens, the second lens, the third lens, the fourth lens, and the seventh lens are f1, f2, f3, f4, and f7 respectively, where f1, f2, f3, f4, and f7 satisfy the following ratios with f: -4.6 < f1 / f < -2.5, -4.5 < f2 / f < -2.5, 250 < f3 / f < 280, 2.3 < f4 / f < 6.3, 1.9 < f7 / f < 4.8.

[0019] Preferably, N d is the refractive index, and V d is the Abbe number. The refractive index and Abbe number of the first lens satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and Abbe number of the second lens satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and Abbe number of the third lens satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and Abbe number of the fourth lens satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and Abbe number of the fifth lens satisfy the relationship: Nd ≥ 1.5, Vd ≥ 40; the refractive index and Abbe number of the sixth lens satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the seventh lens satisfies the relationship: Nd ≥ 1.5, Vd ≤ 60.

[0020] Preferably, the second lens and the seventh lens are glass aspherical lenses; the expression of the aspherical curve equation is: Where Z is the sagitta height from the vertex of the aspheric surface when the aspheric surface is at a position with a height of h along the optical axis; c is the paraxial curvature of the aspheric surface; k is the conic constant; α1, α2, α3, α4, α5, α6, α7, and α8 are all coefficients of high-order terms.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The first lens, the second lens, the third lens, the fourth lens, the aperture stop, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens are arranged in sequence from left to right along the light incident optical path; the first lens is a meniscus negative lens, the second lens is a negative lens, the third lens has a positive optical power, the fourth lens is a positive lens, the fifth lens is a biconvex positive lens, the sixth lens is a biconcave negative lens, the seventh lens is a biconvex positive lens, the eighth lens is a color filter, and the ninth lens is a protective glass. The imaging surface of the lens is located outside the image surface of the protective glass. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are all fixedly installed in the lens barrel. The first lens, the second lens, the third lens, the fourth lens, the aperture stop, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens ensure the performance of the vehicle-mounted landscape lens, and the lens barrel can improve the structural stability of the vehicle-mounted landscape lens; 2. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens are made of glass mirror surfaces. Compared with common glass-plastic hybrid lenses, the lens design of the present invention uses glass and glass aspheric surfaces. Glass materials have higher heat resistance and impact resistance, can maintain the stability of optical imaging under extreme temperatures or rapid temperature differences, effectively avoid problems such as deformation and aging that may occur in plastic lenses under high or low temperature environments, extend the service life of the lens, and ensure the reliability and stability of the lens in various complex environments; 3. The fifth lens and the sixth lens are adhesively bonded to form an adhesive lens group. The side of the fifth lens close to the aperture stop is in close contact with the aperture stop. The aperture stop can effectively block non-imaging light from entering the optical component, reduce the interference of stray light, accurately control the incident angle and the light passing aperture of the light, thereby reducing the generation of ghost stray light and optimizing the imaging quality.

[0022] 4. The all-glass lens can effectively reduce chromatic aberration and spherical aberration, provide a higher-quality imaging effect. The optical properties of glass materials are superior to those of plastics, and can better refract and focus light, making the imaging clearer, sharper, and the color reproduction more real, improving the optical performance of the vehicle-mounted landscape lens when capturing high-resolution images.

[0023] 5. Traditional ultra-wide-angle lenses have a pixel count of around three million. This ultra-wide-angle lens has an effective field of view angle greater than 180°, and at the same time, it can provide high-resolution imaging capabilities of up to eight million pixels, capturing more details and providing clearer images. This is crucial for applications with high requirements for image accuracy in intelligent driving systems, enabling better identification and analysis of environmental information.

[0024] 6. The aperture of the present invention is F1.8, which can enhance the light flux. With a large aperture design, it can capture more light flux and enhance the image brightness; enabling the lens to provide clear images even under low light conditions, improving the imaging quality of in-vehicle landscape lenses at night or in insufficient light environments; the large aperture design not only increases the image brightness but also improves the detail resolution, making the imaging clearer.

[0025] 7. The ghost and stray light intensity of the optical components is better than 120 dB, effectively reducing the unexpected reflection and scattering of light within the optical components. Furthermore, it eliminates the unexpected focal points caused by surface reflection of optical elements in the imaging optical path and the virtual image focal points formed by multiple reflections in the ghost optical path, significantly reducing the interference of ghosts on the imaging quality, effectively suppressing the generation of stray light and ghosts, thereby improving the imaging performance of the optical components.

[0026] 8. The present invention precisely optimizes the surface incident angle of the optical elements, setting the control angle to less than 45 degrees, significantly reducing the sensitivity to design tolerances. This makes the requirements for processing accuracy relatively loose during the manufacturing process. Therefore, the defective rate caused by processing errors is reduced, and the yield rate of the product is significantly improved; at the same time, the loose tolerance requirements also make it easier to mass-produce the optical components, reducing the manufacturing cost and time consumption, and effectively improving the mass producibility of the optical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of an in-vehicle landscape lens according to an embodiment of the present application.

[0028] Figure 2 is the axial chromatic aberration curve graph of an embodiment of the present application.

[0029] Figure 3 is the lateral chromatic aberration curve graph of an embodiment of the present application.

[0030] Figure 4 is the field curvature and distortion curve graph of an embodiment of the present application.

[0031] Figure 5 is the relative luminance graph of an embodiment of the present application.

[0032] Figure 6 is the chief ray angle graph of an embodiment of the present application.

[0033] Figure 7 It is the MTF curve graph of the embodiment of the present application.

[0034] Figure 8 It is the defocus curve graph at 125 lp / mm at 25°C of the embodiment of the present application.

[0035] Figure 9 It is the defocus curve graph at 125 lp / mm at -40°C of the embodiment of the present application.

[0036] Figure 10 It is the defocus curve graph at 125 lp / mm at 105°C of the embodiment of the present application.

[0037] Figure 11 It is the MTF vs Field curve graph at 125 lp / mm at 25°C of the embodiment of the present application.

[0038] Figure 12 It is the MTF vs Field curve graph at 125 lp / mm at -40°C of the embodiment of the present application.

[0039] Figure 13 It is the MTF vs Field curve graph at 125 lp / mm at 105°C of the embodiment of the present application.

[0040] Explanation of reference numerals: 1, lens barrel; 11, lens cap; 12, diaphragm; 13, first cylinder; 14, second cylinder; 15, third cylinder; 16, fourth cylinder; 17, first cylinder ring; 18, second cylinder ring; 19, third cylinder ring; 110, first cap ring; 111, second cap ring; 112, first sealing ring; 113, barb ring; 114, second sealing ring; 2, first lens; 3, second lens; 4, third lens; 41, first snap ring; 5, fourth lens; 51, second snap ring; 6, fifth lens; 7, sixth lens; 71, third snap ring; 8, seventh lens; 9, eighth lens; 10, ninth lens. Detailed implementation manners

[0041] The following further describes the present application in detail with reference to the accompanying drawings.

[0042] The embodiment of the present application discloses a vehicle-mounted landscape lens. Refer to Figure 1 As shown, a vehicle-mounted landscape lens includes a lens barrel 1, a lens cap 11, a first lens 2, a second lens 3, a third lens 4, a fourth lens 5, a diaphragm 12, a fifth lens 6, a sixth lens 7, a seventh lens 8, an eighth lens 9, and a ninth lens 10.

[0043] Refer to Figure 1As shown, the lens barrel 1 includes a first barrel body 13, a second barrel body 14, a third barrel body 15, and a fourth barrel body 16. The first barrel body 13, the second barrel body 14, the third barrel body 15, and the fourth barrel body 16 are arranged in sequence from left to right along the light incident optical path, and the first barrel body 13, the second barrel body 14, the third barrel body 15, and the fourth barrel body 16 are coaxially arranged. The first barrel body 13 includes a first barrel ring 17, a second barrel ring 18, and a third barrel ring 19, and the first barrel ring 17, the second barrel ring 18, and the third barrel ring 19 are coaxially arranged.

[0044] Refer to Figure 1 As shown, the first barrel ring 17 is connected to the second barrel body 14. The second barrel ring 18 is sleeved on the outer side surface of the first barrel ring 17, and the second barrel ring 18 is connected to the first barrel ring 17. The third barrel ring 19 is sleeved on the outer side surface of the second barrel ring 18, and the third barrel ring 19 is connected to the second barrel ring 18. The lens cap 11 is sleeved on the outside of the third barrel ring 19.

[0045] Refer to Figure 1 As shown, the lens cap 11 includes a first cap ring 110 and a second cap ring 111. The first cap ring 110, the second cap ring 111, and the third barrel body 15 are coaxially arranged. The first cap ring 110 is connected to the third barrel ring 19, and the second cap ring 111 is connected to the first cap ring 110. A first sealing ring 112 is arranged between the second cap ring 111 and the third barrel ring 19. The first sealing ring 112 is coaxially arranged with the third barrel ring 19, and the first sealing ring 112 is coaxially arranged with the second cap ring 111, improving the connection stability between the lens barrel 1 and the lens cap 11.

[0046] Refer to Figure 1 As shown, a barb ring 113 is arranged on the side surface of the first cap ring 110 away from the first sealing ring 112. The barb ring 113 is connected to the second cap ring 111 and is coaxially arranged with the second cap ring 111. The first lens 2 is arranged inside the barb ring 113 and is in close contact with the inner side surface of the barb ring 113. The side surface of the first lens 2 close to the third barrel ring 19 is in close contact with the side surface of the second barrel ring 18. A second sealing ring 114 is arranged between the first lens 2 and the second barrel ring 18, improving the clamping stability between the first lens 2 and the lens cap 11 and the lens barrel 1.

[0047] Refer to Figure 1 As shown, the second lens 3, the third lens 4, and the fourth lens 5 are arranged inside the first barrel ring 17. The side surface of the second lens 3 close to the first lens 2 is in close contact with the first lens 2. The side surface of the third lens 4 close to the second lens 3 is in close contact with the second lens 3. A first snap ring 41 is arranged between the third lens 4 and the fourth lens 5. The fifth lens 6 is arranged inside the third barrel body 15. A second snap ring 51 is arranged between the fourth lens 5 and the fifth lens 6. The second snap ring 51 is arranged inside the second barrel body 14.

[0048] Refer toFigure 1 As shown, the sixth lens 7, the seventh lens 8, and the eighth lens 9 are disposed within the fourth cylinder 16. The sixth lens 7 is in close contact with the fifth lens 6. A third snap ring 71 is provided between the sixth lens 7 and the seventh lens 8. A step is provided within the fourth cylinder 16, and the seventh lens 8 and the eighth lens 9 are located on both sides of the step, improving the connection stability between the second lens 3, the third lens 4, the fourth lens 5, the fifth lens 6, the sixth lens 7, the seventh lens 8, the eighth lens 9 and the lens barrel 1.

[0049] Referring to Figure 1 As shown, the fifth lens 6 and the sixth lens 7 are adhesively disposed to form an adhesive lens group. The side of the fifth lens 6 close to the aperture stop 12 is in close contact with the aperture stop 12. The aperture stop 12 can effectively block non-imaging light from entering the optical component, reduce the interference of stray light, accurately control the incident angle and the light passing aperture of the light, thereby reducing the generation of ghost stray light and optimizing the imaging quality.

[0050] Referring to Figure 1 As shown, the focal length of the optical component is f, and the focal lengths of the first lens 2, the second lens 3, the third lens 4, the fourth lens 5, and the seventh lens 8 are f1, f2, f3, f4, and f7 respectively, where f1, f2, f3, f4, f7 and f satisfy the following ratios: -4.6 < f1 / f < -2.5, -4.5 < f2 / f < -2.5, 250 < f3 / f < 280, 2.3 < f4 / f < 6.3, 1.9 < f7 / f < 4.8.

[0051] N d is the refractive index, and V d is the Abbe number. The refractive index and the Abbe number of the first lens 2 satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and the Abbe number of the second lens 3 satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and the Abbe number of the third lens 4 satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and the Abbe number of the fourth lens 5 satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the refractive index and the Abbe number of the fifth lens 6 satisfy the relationship: Nd ≥ 1.5, Vd ≥ 40; the refractive index and the Abbe number of the sixth lens 7 satisfy the relationship: Nd ≥ 1.5, Vd ≤ 60; the seventh lens 8 satisfies the relationship: Nd ≥ 1.5, Vd ≤ 60.

[0052] The second lens 3 and the seventh lens 8 are glass aspherical lenses; the expression of the aspherical curve equation is: where Z is the sagitta height from the vertex of the aspherical surface at the position where the height of the aspherical surface along the optical axis is h; c is the paraxial curvature of the aspherical surface; k is the conic constant; α1, α2, α3, α4, α5, α6, α7, α8 are all high-order term coefficients.

[0053] In this embodiment, the following relationship is satisfied between the semi-image height ImaH of the optical component and the focal length f of the optical component: 1.5 ≤ ImaH / f.

[0054] The technical indicators achieved by the optical component in this embodiment are as follows: (1) Focal length: 2.5 mm ≤ EFFL ≤ 3.5 mm; (2) Aperture F ≤ 1.8; (3) Field of view angle: 2w ≥ 180; To achieve the above design parameters, the specific design adopted by the optical component is shown in Table 1: Table 1 In this embodiment, the aspheric coefficients of the glass aspheric lenses of the optical component are shown in Table 2: Table 2 The implementation principle of a vehicle-mounted landscape lens according to an embodiment of the present application is as follows: The first lens 2, the second lens 3, the third lens 4, the fourth lens 5, the aperture stop 12, the fifth lens 6, the sixth lens 7, the seventh lens 8, the eighth lens 9, and the ninth lens 10 are arranged in sequence from left to right along the light incident optical path; the first lens 2 is a meniscus negative lens, the second lens 3 is a negative lens, the third lens 4 has a positive optical power, the fourth lens 5 is a positive lens, the fifth lens 6 is a biconvex positive lens, the sixth lens 7 is a biconcave negative lens, the seventh lens 8 is a biconvex positive lens, the eighth lens 9 is a color filter, and the ninth lens 10 is a protective glass. The lens imaging surface is located outside the image plane of the protective glass. The first lens 2, the second lens 3, the third lens 4, the fourth lens 5, the fifth lens 6, the sixth lens 7, and the seventh lens 8 are all fixedly installed in the lens barrel 1. The first lens 2, the second lens 3, the third lens 4, the fourth lens 5, the aperture stop 12, the fifth lens 6, the sixth lens 7, the seventh lens 8, the eighth lens 9, and the ninth lens 10 ensure the performance of the vehicle-mounted landscape lens, and the lens barrel 1 can improve the structural stability of the vehicle-mounted landscape lens.

[0055] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A vehicle-mounted landscape lens, characterized in that: The invention comprises an optical assembly and a lens barrel (1), wherein the optical assembly comprises a first lens (2), a second lens (3), a third lens (4), a fourth lens (5), an aperture (12), a fifth lens (6), a sixth lens (7), a seventh lens (8), an eighth lens (9), and a ninth lens (10) which are arranged in sequence from left to right along the incident light path of the light; the first lens (2) is a meniscus negative lens, the second lens (3) is a negative lens, the third lens (4) has positive focal power, the fourth lens (5) is a positive lens, the fifth lens (6) is a biconvex positive lens, the sixth lens (7) is a biconcave negative lens, the seventh lens (8) is a biconvex positive lens, the eighth lens (9) is a color filter, the ninth lens (10) is a protective glass, the outer side of the protective glass image surface is the lens imaging surface, and the first lens (2), the second lens (3), the third lens (4), the fourth lens (5), the fifth lens (6), the sixth lens (7), and the seventh lens (8) are all fixedly mounted in the lens barrel (1).

2. The vehicle-mounted landscape lens according to claim 1, characterized in that: The lens barrel (1) comprises a first barrel (13), a second barrel (14), a third barrel (15) and a fourth barrel (16) which are arranged in sequence from left to right along the incident light path of the light, the first barrel (13) comprising a first barrel ring (17) connected to the second barrel (14), a second barrel ring (18) connected to the first barrel ring (17) and a third barrel ring (19) connected to the second barrel ring (18), the third barrel ring (19) being provided with a lens cap on its outer surface (11), the mirror cap (11) comprises a first cap ring (110) connected to the third tube ring (19) and a second cap ring (111) connected to the first cap ring (110), a sealing ring (112) is arranged between the second cap ring (111) and the third tube ring (19), the sealing ring (112) and the third tube ring (19) are arranged coaxially, and the sealing ring (112) and the second cap ring (111) are arranged coaxially.

3. The vehicle-mounted landscape lens according to claim 2, characterized in that: A barb ring (113) is arranged on the side of the first cap ring (110) away from the sealing ring 1 (112), the barb ring (113) is connected to the second cap ring (111), the barb ring (113) and the second cap ring (111) are arranged coaxially, the first lens (2) is arranged in the barb ring (113), the first lens (2) is tightly attached to the inner side of the barb ring (113), the side of the first lens (2) close to the third tube ring (19) is tightly attached to the side of the second tube ring (18), and a sealing ring 2 (114) is arranged between the first lens (2) and the second tube ring (18).

4. The vehicle-mounted landscape lens according to claim 3, characterized in that: The second lens (3), the third lens (4) and the fourth lens (5) are arranged in the first tube ring (17); the side of the second lens (3) close to the first lens (2) is in close contact with the first lens (2); the side of the third lens (4) close to the second lens (3) is in close contact with the second lens (3); a first retaining ring (41) is arranged between the third lens (4) and the fourth lens (5); the fifth lens (6) is arranged in the third tube body (15); the fourth lens (5) and the fifth lens (6) are in close contact with each other; A second clamping ring (51) is arranged between the lenses (6), the second clamping ring (51) is arranged in the second barrel (14), the sixth lens (7), the seventh lens (8) and the eighth lens (9) are arranged in the fourth barrel (16), the sixth lens (7) and the fifth lens (6) are closely attached to each other, a third clamping ring (71) is arranged between the sixth lens (7) and the seventh lens (8), a step is arranged in the fourth barrel (16), and the seventh lens (8) and the eighth lens (9) are located on both sides of the step.

5. The vehicle-mounted landscape lens according to claim 1, characterized in that: The first lens (2), the second lens (3), the third lens (4), the fourth lens (5), the fifth lens (6), the sixth lens (7) and the seventh lens (8) are glass mirror surfaces.

6. The vehicle-mounted landscape lens according to claim 1, characterized in that: The fifth lens (6) and the sixth lens (7) are bonded together to form a bonded lens group, and the side surface of the fifth lens (6) close to the aperture (12) is in close contact with the aperture (12).

7. The vehicle-mounted landscape lens according to claim 1, characterized in that: The focal length of the optical component is f, and the focal lengths of the first lens (2), the second lens (3), the third lens (4), the fourth lens (5), and the seventh lens (8) are f1, f2, f3, f4, and f7, respectively, wherein f1, f2, f3, f4, and f7 satisfy the following ratio with f: -4.6 <f1 / f<-2.5,-4.5<f2 / f<-2.5,250<f3 / f<280,2.3<f4 / f<6.3,1.9<f7 / f<4.8。 8. The vehicle-mounted landscape lens according to claim 1, characterized in that: N d is the refractive index, V d is the Abbe constant, the refractive index and the Abbe constant of the first lens (2) satisfy the relationship: Nd≥1.5, Vd≤60; the refractive index and the Abbe constant of the second lens (3) satisfy the relationship: Nd≥1.5, Vd≤60; the refractive index and the Abbe constant of the third lens (4) satisfy the relationship: Nd≥1.5, Vd≤60; the refractive index and the Abbe constant of the fourth lens (5) satisfy the relationship: Nd≥1.5, Vd≤60; the refractive index and the Abbe constant of the fifth lens (6) satisfy the relationship: Nd≥1.5, Vd≥40; the refractive index and the Abbe constant of the sixth lens (7) satisfy the relationship: Nd≥1.5, Vd≤60; the seventh lens (8) satisfies the relationship: Nd≥1.5, Vd≤60.

9. The vehicle-mounted landscape lens according to claim 1, characterized in that: The second lens (3) and the seventh lens (8) are glass aspheric lenses; the aspheric curve equation is expressed as: Among them, Z is the height of the aspheric surface from the vertex of the aspheric surface when it is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface; k is the cone constant; α1, α2, α3, α4, α5, α6, α7, and α8 are all high-order coefficients.

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