Patent ID: 11914111
Assignee: ZHEJIANG SUNNY OPTICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An imaging lens assembly, sequentially comprising, from an object side to an image side along an optical axis:
a movable diaphragm,
a first lens with a positive refractive power,
a second lens with a negative refractive power,
a third lens with a refractive power,
a fourth lens with a refractive power,
a fifth lens with a refractive power and
a sixth lens with a negative refractive power,
wherein TSmin is a distance from the movable diaphragm at a minimum distance from an imaging surface of the imaging lens assembly to an object-side surface of the first lens on the optical axis, TSmax is a distance from the movable diaphragm at a maximum distance from the imaging surface of the imaging lens assembly to the object-side surface of the first lens on the optical axis, EPDmin is a minimum entrance pupil diameter (EPD) of the imaging lens assembly, TSmin and TSmax and EPDmin meet 1≤EPDmin/(|TSmin|+|TSmax|)≤2.5;
a total effective focal length f of the imaging lens assembly and a curvature radius R11 of an object-side surface of the sixth lens meet −3.5<R11/f<−2.0.