US 12,078,782 B2
Camera lens
Jiacheng Yao, Yuyao (CN); Saifeng Lv, Yuyao (CN); Fujian Dai, Yuyao (CN); and Liefeng Zhao, Yuyao (CN)
Assigned to ZHEJIANG SUNNY OPTICS CO., LTD., Zhejiang (CN)
Filed by ZHEJIANG SUNNY OPTICS CO., LTD., Zhejiang (CN)
Filed on Oct. 25, 2021, as Appl. No. 17/509,745.
Claims priority of application No. 202011217789.8 (CN), filed on Nov. 4, 2020.
Prior Publication US 2022/0137337 A1, May 5, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/12 (2006.01)
CPC G02B 13/0035 (2013.01) [G02B 9/12 (2013.01); G02B 13/0055 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A camera lens, comprising, in order from an object side to an image side along an optical axis:
a first lens having a positive refractive power;
a second lens having a positive refractive power or a negative refractive power, wherein the second lens a concave object side surface; and
a third lens having a positive refractive power or a negative refractive power which is opposite to the refractive power of the second lens, wherein there are three lenses: the first lens, the second lens, and the third lens, between the object side and the image side;
wherein an equivalent length TL of an actual propagation distance of a principal ray from an object side surface of the first lens to an imaging plane in the air and an entrance pupil diameter EPD of the camera lens satisfy: 3.5<TL/EPD<4.0;
wherein a total effective focal length f of the camera lens satisfies: f≥40 mm;
wherein the total effective focal length f of the camera lens and a maximum semi-field of view Semi-FOV of the camera lens satisfy: f×tan(Semi-FOV)>5.0.