US 12,449,638 B2
Camera optical lens
Tao Xiong, Shenzhen (CN)
Assigned to AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed by AAC Optics (Suzhou) Co., Ltd., Suzhou (CN)
Filed on Dec. 24, 2021, as Appl. No. 17/561,737.
Claims priority of application No. 202111113339.9 (CN), filed on Sep. 23, 2021.
Prior Publication US 2023/0091442 A1, Mar. 23, 2023
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 9 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 positive refractive power, a second lens having a negative refractive power, a third lens having a negative refractive power, a fourth lens having a refractive power, a fifth lens having a positive refractive power, and a sixth lens having a negative refractive power; the fourth lens has an object side surface being convex in a paraxial region; wherein the camera optical lens satisfies the following conditions:
0.35≤f1/f≤0.70;
R3/R4≤−1.50;
R5/R6≤−5.00;
1.20≤d8/d9≤6.00;
−19.42≤f4/f≤5.84;
0.22≤(R7+R8)/(R7−R8)≤7.64; and
0.01≤d7/TTL≤0.15;
where,
f: a focal length of the camera optical lens;
f1: a focal length of the first lens;
R3: a central curvature radius of an object side surface of the second lens;
R4: a central curvature radius of an image side surface of the second lens;
R5: a central curvature radius of an object side surface of the third lens;
R6: a central curvature radius of an image side surface of the third lens;
d8: an on-axis distance from an image side surface of the fourth lens to an object side surface of the fifth lens;
d9: an on-axis thickness of the fifth lens;
f4: a focal length of the fourth lens;
R7: a central curvature radius of the object side surface of the fourth lens;
R8: a central curvature radius of the image side surface of the fourth lens;
d7: an on-axis thickness of the fourth lens; and
TTL: a total optical length from an object side surface of a first lens of the camera optical lens to an image surface of the camera optical lens along an optical axis.