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

Claim 12:
13. 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 maximum effective radius DT11 of an object-side surface of the first lens and a maximum effective radius DT71 of an object-side surface of the seventh lens meet 0.2<DT11/DT71<0.7.