Patent ID: 11914110
Assignee: ZHEJIANG SUNNY OPTICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A photographic optical system, sequentially comprising from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens,
wherein,
the first lens has a positive refractive power, an object-side surface thereof is a convex surface, and an image-side surface is a concave surface;
the second lens has a negative refractive power, an object-side surface thereof is a convex surface, and an image-side surface is a concave surface;
the third lens has a refractive power;
the fourth lens has a refractive power;
the fifth lens has a positive refractive power;
the sixth lens has a negative refractive power, and an object-side surface thereof is a concave surface; and
TTL is a distance from the object-side surface of the first lens to an imaging surface of the photographic optical system on the optical axis and ImgH is a half the diagonal length of an effective pixel area on the imaging surface of the photographic optical system, and TTL and ImgH satisfy TTL/ImgH<1.5;
a spacing distance T56 of the fifth lens and the sixth lens on the optical axis and a spacing distance T23 of the second lens and the third lens on the optical axis satisfy 0.6<T56/T23<1.2.