US 12,216,261 B2
Wide-angle lens, camera module and vehicle camera
Tao Long, Nanchang (CN); Weijian Chen, Nanchang (CN); Xinyue Zhang, Nanchang (CN); and Jiyong Zeng, Nanchang (CN)
Assigned to JIANGXI LIANCHUANG ELECTRONIC CO., LTD., Nanchang (CN)
Filed by JIANGXI LIANCHUANG ELECTRONIC CO., LTD., Nanchang (CN)
Filed on Jun. 10, 2021, as Appl. No. 17/343,785.
Application 17/343,785 is a continuation in part of application No. PCT/CN2020/131877, filed on Nov. 26, 2020.
Claims priority of application No. 201911310977.2 (CN), filed on Dec. 18, 2019.
Prior Publication US 2021/0302704 A1, Sep. 30, 2021
Int. Cl. G02B 13/06 (2006.01); B60R 11/04 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01); H04N 23/55 (2023.01)
CPC G02B 13/06 (2013.01) [B60R 11/04 (2013.01); G02B 9/64 (2013.01); G02B 13/0045 (2013.01); H04N 23/55 (2023.01)] 18 Claims
OG exemplary drawing
 
1. A wide-angle lens, from an object side to an image side along an optical axis, sequentially comprising a first lens, a second lens, a third lens, a fourth lens, a stop, a fifth lens, a sixth lens, a seventh lens, and a filter, wherein
the first lens has a negative focal power, an object side surface of the first lens is convex, and an image side surface of the first lens is concave;
the second lens has a negative focal power, an object side surface of the second lens is convex, and the image side surface of the second lens is concave;
the third lens has a negative focal power, and an object side surface and an image side surface of the third lens are both concave;
the fourth lens has a positive focal power, and an object side surface and an image side surface of the fourth lens are both convex;
the fifth lens has a positive focal power, and an object side surface and an image side surface of the fifth lens are both convex;
the sixth lens has a negative focal power, an object side surface and an image side surface of the sixth lens are both concave, and the fifth lens and the sixth lens form a cemented body; and
the seventh lens has a positive focal power, and an object side surface and an image side surface of the seventh lens are both convex;
wherein the first lens and the fourth lens are glass spherical lenses, and each of the second lens, the third lens, the fifth lens, the sixth lens, and the seventh lens is a plastic aspherical lens;
wherein the wide-angle lens meets the expression:
1.55<h/f<1.65;
where h represents an image height corresponding to half of the maximum field of view of the wide-angle lens, and f represents an effective focal length of the wide-angle lens.