US 11,675,166 B2
Optical imaging lens including eight lenses of −+−+−++−, −+−+−−+−, ++−−+−+−, ++−+−++− or −+−−+−+− refractive powers
Lin Huang, Zhejiang (CN); Saifeng Lv, Zhejiang (CN); Fujian Dai, Zhejiang (CN); and Liefeng Zhao, Zhejiang (CN)
Assigned to ZHEJIANG SUNNY OPTICAL, CO., LTD, Zhejiang (CN)
Filed by ZHEJIANG SUNNY OPTICAL, CO., LTD, Zhejiang (CN)
Filed on Jul. 21, 2020, as Appl. No. 16/934,042.
Claims priority of application No. 201910923460.4 (CN), filed on Sep. 27, 2019.
Prior Publication US 2021/0096330 A1, Apr. 1, 2021
Int. Cl. G02B 13/00 (2006.01); G02B 9/64 (2006.01)
CPC G02B 13/0045 (2013.01) [G02B 9/64 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An optical imaging lens, sequentially comprising from an object side to an image side along an optical axis:
a first lens with refractive power;
a second lens with positive refractive power;
a third lens with negative refractive power;
a fourth lens with refractive power;
a fifth lens with refractive power;
a sixth lens with refractive power;
a seventh lens with positive refractive power; and
an eighth lens with negative refractive power;
wherein, a total effective focal length f of the optical imaging lens and a maximum Field of View (FOV) of the optical imaging lens meet f×TAN(FOV/2)>4.0 mm; and
the total effective focal length f of the optical imaging lens, a center thickness CT7 of the seventh lens on the optical axis and a center thickness CT8 of the eighth lens on the optical axis meet:
f/(CT7+CT8)≥5.0;
the total effective focal length f of the optical imaging lens, a curvature radius R13 of an object-side surface of the seventh lens and a curvature radius R14 of an image-side surface of the seventh lens meet:
f/R13+f/R14>3.5.