US 12,019,232 B2
Endoscope lens, camera module and endoscope
Wenzhe Wei, Nanchang (CN); Xuming Liu, Nanchang (CN); Jiyong Zeng, Nanchang (CN); and Zhuo Wang, Nanchang (CN)
Assigned to JIANGXI LIANCHUANG ELECTRONIC CO., LTD., Nanchang (CN)
Filed by JIANGXI LIANCHUANG ELECTRONIC CO., LTD., Nanchang (CN)
Filed on Nov. 8, 2021, as Appl. No. 17/521,819.
Application 17/521,819 is a continuation in part of application No. PCT/CN2020/085923, filed on Apr. 21, 2020.
Claims priority of application No. 201910516654.2 (CN), filed on Jun. 14, 2019.
Prior Publication US 2022/0066193 A1, Mar. 3, 2022
Int. Cl. G02B 23/24 (2006.01); A61B 1/00 (2006.01); G02B 9/04 (2006.01); G02B 13/00 (2006.01)
CPC G02B 23/243 (2013.01) [A61B 1/00186 (2013.01); G02B 13/003 (2013.01); G02B 9/04 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An endoscope lens, from an object side to an image side thereof, the endoscope lens consisting of following components sequentially:
a stop;
a first lens having a concave object side surface and a convex image side surface;
a second lens; and
a filter arranged between the second lens and the image side;
wherein the first lens is a glass or plastic aspheric lens, and the second lens is a glass or plastic aspheric lens;
wherein the endoscope lens meets an expression:
0<(f2/Fno)+f<1;
where f represents an effective focal length of the endoscope lens, and Fno represents an F number of the endoscope lens; and
wherein a field of view of the endoscope lens is greater than or equal to 120°, and an optical total length of the endoscope lens is less than 1.50 mm.