US 12,001,081 B2
Camera optical lens
Hiroyuki Teraoka, Osaka (JP); and Takayuki Sakaguchi, Osaka (JP)
Assigned to Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed by Changzhou Raytech Optronics Co., Ltd., Changzhou (CN)
Filed on Apr. 12, 2021, as Appl. No. 17/227,400.
Claims priority of application No. 2021-018578 (JP), filed on Feb. 8, 2021.
Prior Publication US 2022/0260807 A1, Aug. 18, 2022
Int. Cl. G02B 9/64 (2006.01); G03B 30/00 (2021.01)
CPC G02B 9/64 (2013.01) [G03B 30/00 (2021.01)] 4 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 negative refractive power, a second lens having a positive refractive power, a third lens, a fourth lens having a negative refractive power, a fifth lens having a positive refractive power, a sixth lens, a seventh lens having a negative refractive power and provided with an image-side surface as a free-form surface; wherein the camera optical lens satisfies conditions of:
|f2/f3|≤0.07;
−0.50≤f2/f4≤−0.30;
0.58≤D12/f≤0.64; and
0.35≤D23/f≤0.45; and
where
f denotes a focal length of the camera optical lens;
f2 denotes a focal length of the second lens;
f3 denotes a focal length of the third lens;
f4 denotes a focal length of the fourth lens;
D12 denotes an on-axis distance from an object-side surface of the first lens to an image-side surface of the second lens; and
D23 denotes an on-axis distance from an object-side surface of the second lens to an image-side surface of the third lens.