Patent ID: 11927730
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. An optical imaging system comprising:
a first lens comprising negative refractive power;
a second lens comprising refractive power;
a third lens comprising positive refractive power, a convex object-side surface and a convex image-side surface;
a fourth lens comprising negative refractive power;
a fifth lens comprising refractive power;
a sixth lens comprising refractive power; and
a seventh lens comprising negative refractive power,
wherein the first to seventh lenses are sequentially disposed from an object side toward an image side,
wherein n3<1.64 is satisfied, where n3 is a refractive index of the third lens,
wherein TTL/(2*IMGH)<3.0 is satisfied, where TTL is a distance from an object-side surface of the first lens to an imaging plane of an image sensor, and IMGH is a half of a diagonal length of the imaging plane of the image sensor, and
wherein −0.5<f/f7<−0.1 is satisfied, where f7 is a focal length of the seventh lens, and f is an overall focal length of the optical imaging system.