US 11,693,220 B2
Camera optical lens
Xuqi Bian, 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. 17/137,453.
Claims priority of application No. 202011046629.1 (CN), filed on Sep. 29, 2020.
Prior Publication US 2022/0099937 A1, Mar. 31, 2022
Int. Cl. G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 27/00 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 27/0025 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A camera optical lens comprising, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens;
wherein the camera optical lens satisfies following conditions:
0.95≤f/TTL;
−4.00≤f2/f≤−1.90; and
−15.00≤(R7+R8)/(R7−R8)≤−2.50;
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;
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
R7 denotes a central curvature radius of an object-side surface of the fourth lens; and
R8 denotes a central curvature radius of an image-side surface of the fourth lens.