US 11,874,441 B2
Camera optical lens including nine lenses of +−−−++−+−, +−−+++−+− or +−+++−++− refractive powers
Guobing Tian, Shenzhen (CN)
Assigned to Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed by Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed on Dec. 22, 2020, as Appl. No. 17/129,942.
Claims priority of application No. 202010931771.8 (CN), filed on Sep. 8, 2020.
Prior Publication US 2022/0075143 A1, Mar. 10, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A camera optical lens, comprising, from an object side to an image side:
a first lens;
a second lens having a negative refractive power;
a third lens;
a fourth lens;
a fifth lens having a positive refractive power;
a sixth lens;
a seventh lens;
an eighth lens; and
a ninth lens,
wherein the camera optical lens satisfies following conditions:
0.80≤f1/f≤1.80;
−8.00≤R17/R18≤−1.50; and
1.50≤d3/d4≤8.00,
where
f denotes a focal length of the camera optical lens,
f1 denotes a focal length of the first lens,
R17 denotes a central curvature radius of an object side surface of the ninth lens,
R18 denotes a central curvature radius of an object side surface of the ninth lens,
d3 denotes an on-axis thickness of the second lens, and
d4 denotes an on-axis distance from an image side surface of the second lens to an object side surface of the third lens.