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

Claim 7:
8. 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;
a fourth lens comprising negative refractive power;
a fifth lens comprising positive refractive power, and a concave object-side surface; 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 BFL/EFL<0.31, where BFL is a distance from an image-side surface of the sixth lens to the image plane of the image sensor and EFL is an entire focal length of the optical system including the first to sixth lenses.