US 11,947,081 B2
Camera optical lens including nine lenses of +−−+−−−+−, +−−+−+−+− or +−−+++−+− refractive powers
Yanan Wang, Shenzhen (CN)
Assigned to Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed by Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed on Dec. 25, 2020, as Appl. No. 17/134,206.
Claims priority of application No. 202010931750.6 (CN), filed on Sep. 8, 2020.
Prior Publication US 2022/0075148 A1, Mar. 10, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01); G02B 13/06 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01); G02B 13/06 (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;
a sixth lens;
a seventh lens having a negative refractive power;
an eighth lens having a positive refractive power; and
a ninth lens,
wherein an image side surface of the eighth lens is a concave surface at the paraxial position, an object side surface of the ninth lens is a convex surface at the paraxial position,
wherein the camera optical lens satisfies following conditions:
0.60≤f1/f≤1.50;
−4.00≤f3/f≤−1.50; and
2.50≤d7/d8≤12.00,
where
f denotes a focal length of the camera optical lens,
f1 denotes a focal length of the first lens,
f3 denotes a focal length of the third lens,
d7 denotes an on-axis thickness of the fourth lens, and
d8 denotes an on-axis distance from an image side surface of the fourth lens to an object side surface of the fifth lens.