Patent ID: 11899281
Assignee: ZHEJIANG SUNNY OPTICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
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 positive refractive power, wherein an image-side surface thereof is a convex surface;
a fourth lens with refractive power, wherein an object-side surface thereof is a concave surface;
a fifth lens with positive refractive power, wherein an object-side surface thereof is a concave surface;
a sixth lens with refractive power; and
a seventh lens with refractive power, wherein
a total effective focal length f of the optical imaging lens and a curvature radius R4 of an image-side surface of the second lens meet 0.6<R4/f<1.5; and
TTL is a distance from an object-side surface of the first lens to an imaging surface of the optical imaging lens on the optical axis, and ImgH is a half of a diagonal length of an effective pixel region on the imaging surface of the optical imaging lens, TTL and ImgH meet 0.55<TTL/(ImgH×2)<0.75.