US 12,411,315 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. 25, 2020, as Appl. No. 17/134,191.
Claims priority of application No. 202010727552.8 (CN), filed on Jul. 27, 2020.
Prior Publication US 2022/0026679 A1, Jan. 27, 2022
Int. Cl. G02B 13/00 (2006.01); G02B 13/06 (2006.01); G02B 13/18 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 13/06 (2013.01); G02B 13/18 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A camera optical lens, comprising, from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens;
wherein the first lens has a negative refractive power, the second lens has a positive refractive power, the fourth lens has a positive refractive power, the fifth lens has a negative refractive power, the sixth lens has a negative refractive power, the seventh lens has a positive refractive power, and the eighth lens has a negative refractive power, wherein at least one of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, or the eighth lens has a free-form surface, and the camera optical lens satisfies:
−3.50≤f2/f1≤−1.50;
−2.00≤R9/R10≤−0.80; and
2.435≤d10/d12≤3.00,
where f1 denotes a focal length of the first lens, f2 denotes a focal length of the second lens, R9 denotes a central curvature radius of an object side surface of the fifth lens, R10 denotes a central curvature radius of an image side surface of the fifth lens, d10 denotes an on-axis distance from the image side surface of the fifth lens to an object side surface of the sixth lens, and d12 denotes an on-axis distance from an image side surface of the sixth lens to an object side surface of the seventh lens.