A large-area 4K high-definition driving recorder lens

Abstract

The large-target 4K high-definition driving recorder lens provided by the present invention includes, in order from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, a filter, a protective glass, and an image plane. The parameters such as the Abbe coefficient of the material of the large-target 4K high-definition driving recorder lens provided by the present invention are well matched with the imaging conditions, effectively reducing the spherical aberration, coma, astigmatism, field curvature, position chromatic aberration, and magnification chromatic aberration of the entire lens system, improving the final imaging quality and chromatic aberration correction. The design adopts low-dispersion materials to optimize the purple fringing effect of the edge of the object, better restore the real scene, and at the same time make the entire optical lens have a thermal compensation effect. The thermal drift is stable at a high temperature of 95 degrees and a low temperature of 40 degrees, greatly improving the applicability of the large-target 4K high-definition driving recorder lens in complex temperature scenarios.

Claims

1. A large-area 4K high-definition driving recorder lens, characterized in that: The large target surface 4K high-definition driving recorder lens sequentially includes seven lenses, a filter, a protective glass, and an image plane along the optical axis direction from the object side to the image side; the seven lenses are sequentially as follows along the optical axis direction from the object side to the image side: The first lens, the first lens is a meniscus lens with negative optical power, the object surface side of the first lens is convex, and the image surface side is concave; The second lens, the second lens is a biconcave lens with negative optical power, the object surface side of the second lens is concave, and the image surface side is concave; The third lens, the third lens is a convex-concave lens with positive optical power, the object surface side of the third lens is convex, and the image surface side is concave; The fourth lens, the fourth lens is a biconvex lens with positive optical power, the object surface side of the fourth lens is convex, and the image surface side is convex; The fifth lens, the fifth lens is a biconvex lens with positive optical power, the object surface side of the fifth lens is convex, and the image surface side is convex; The sixth lens, the sixth lens is a convex-concave lens with negative optical power, and the object surface side of the sixth lens is convex, and the image surface side is concave; The seventh lens, the seventh lens is an aspherical lens with positive optical power, and the object surface side of the seventh lens is convex, and the image surface side is concave; The effective focal length f of the large target surface 4K high-definition driving recorder lens satisfies the following conditions: 5.6mm ≤ f ≤ 6mm; The focal length of the first lens is f1, the focal length of the second lens is f2, the focal length of the third lens is f3, the focal length of the fourth lens is f4, the focal length of the fifth lens is f5, the focal length of the sixth lens is f6, the focal length of the seventh lens is f7, and the overall focal length of the large target surface 4K high-definition driving recorder lens is f, which satisfies the relationship: 0.5 < |f1 / f| < 2.5, 1 < |f2 / f| < 3, 11 < |f3 / f| < 14, 0.9 < |f4 / f| < 2.4, 0.6 < |f5 / f| < 2.0, 1.5 < |f6 / f| < 3.2, 3.8 < |f7 / f| < 4.

5.

2. The large target surface 4K high-definition driving recorder lens according to claim 1, wherein: The refractive indices of the first lens to the seventh lens satisfy the following conditions: 1.3 < n1 < 1.7; 1.3 < n2 < 1.8; 1.5 < n3 < 1.9; 1.3 < n4 < 1.7; 1.4 < n5 < 1.8; 1.5 < n6 < 1.8; 1.4 < n7 < 1.7; where n1 is the refractive index of the first lens, n2 is the refractive index of the second lens, n3 is the refractive index of the third lens, n4 is the refractive index of the fourth lens, n5 is the refractive index of the fifth lens, n6 is the refractive index of the sixth lens, and n7 is the refractive index of the seventh lens.

3. The large target surface 4K high-definition driving recorder lens according to claim 1, wherein: The Abbe coefficients of the second lens, the fourth lens, and the seventh lens are all greater than 53 and less than 59; the Abbe coefficients of the third lens and the sixth lens are all greater than 17 and less than 22; and the Abbe coefficients of the first lens and the fifth lens are all greater than 67 and less than 72.

4. The large-format 4K high-definition driving recorder lens according to any one of claims 1 to 3, characterized in that: The large-target 4K high-definition driving recorder lens has a full image height IH ≥ 9.712 mm.

5. The large-area 4K high-definition driving recorder lens according to any one of claims 1 to 3, characterized in that: The relative aperture of the large-scale 4K high-definition driving recorder lens is F1.

6.

6. The large-area 4K high-definition driving recorder lens according to any one of claims 1 to 3, characterized in that: The total optical length TTL of the large-scale 4K high-definition driving recorder lens satisfies the following conditions: 23mm≤TTL≤28mm.

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