Patent ID: 11921352
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. An optical system comprising:
a first lens comprising negative refractive power, a convex object-side surface and a concave image-side surface;
a second lens comprising positive refractive power, a convex object-side surface and a convex image-side surface;
a third lens comprising negative refractive power, and a convex object-side surface;
a fourth lens comprising negative refractive power;
a fifth lens comprising positive refractive power; and
a sixth lens comprising negative refractive power,
wherein the first to sixth lenses are sequentially disposed from an object side toward an imaging side,
wherein TTL/(ImgH*2)≤0.75 is satisfied, where TTL is a distance from an object-side surface of the first lens to an image plane of the image sensor, and ImgH is half of a diagonal length of the image plane of the image sensor, and
wherein 2.3<f1/f3<2.6, where f1 is a focal length of the first lens and f3 is a focal length of the third lens.