US 12,000,983 B2
Camera optical lens
Wen Sun, Shenzhen (CN)
Assigned to Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed by Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed on Dec. 30, 2020, as Appl. No. 17/137,440.
Claims priority of application No. 202011127920.1 (CN), filed on Oct. 21, 2020.
Prior Publication US 2022/0121009 A1, Apr. 21, 2022
Int. Cl. G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A camera optical lens comprising eight lenses, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, a seventh lens having a negative refractive power, and an eighth lens having a negative refractive power; wherein the first lens includes an image-side surface being concave in the paraxial region, the fourth lens includes an object-side surface being convex in a paraxial region and an image-side surface being concave in the paraxial region; wherein the camera optical lens satisfies the following conditions:
0.95≤f/TTL;
f/IH≥2.25;
−4.00≤f2/f≤−1.80; and
3.00≤(R13+R14)/(R13−R14)≤25.00;
where
TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis;
IH denotes an image height of the camera optical lens;
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
R13 denotes a central curvature radius of an object-side surface of the seventh lens; and
R14 denotes a central curvature radius of an image-side surface of the seventh lens.