Patent ID: 11966014
Assignee: ZHEJIANG SUNNY OPTICAL CO., LTD
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical imaging lens group, comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, which are sequentially arranged from an object side to an image side of the optical imaging lens group along an optical axis,
wherein,
the first lens has positive refractive power, and both an object-side surface and an image-side surface of the first lens are convex surfaces;
the second lens has refractive power, and an object-side surface of the second lens is a convex surface;
the third lens has refractive power, and an object-side surface of the third lens is a concave surface;
the fourth lens has refractive power;
the fifth lens has refractive power;
the sixth lens has refractive power, and an object-side surface of the sixth lens is a convex surface; and
the seventh lens has negative refractive power;
wherein 0.2<ET6/CT6<0.9, where ET6 is an edge thickness of the sixth lens, and CT6 is a center thickness of the sixth lens along the optical axis, and
wherein 0<R11/R3<1,
where R11 is a radius of curvature of the object-side surface of the sixth lens, and R3 is a radius of curvature of the object-side surface of the second lens.