US 11,874,445 B2
Camera optical lens
Wei Sun, Shenzhen (CN)
Assigned to Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed by Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed on Dec. 29, 2020, as Appl. No. 17/136,019.
Claims priority of application No. 202011087332.X (CN), filed on Oct. 13, 2020.
Prior Publication US 2022/0113502 A1, Apr. 14, 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 eight lenses which are, 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 negative refractive power, a fourth lens having a positive refractive power, a fifth lens having a positive refractive power, a sixth lens having a refractive power, a seventh lens having a negative refractive power and an eighth lens having a negative refractive power;
wherein the camera optical lens satisfies following conditions:
0.95≤f/TTL;
−5.00≤f2/f≤−2.00; and
0.40≤(R9+R10)/(R9−R10)≤1.00;
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;
f denotes a focal length of the camera optical 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; and
R10 denotes a central curvature radius of an image-side surface of the fifth lens.