US 2019/0293910 A1 · OPTICAL SYSTEM

Abstract

An optical system includes: a first lens having refractive power; a second lens having refractive power; a third lens having refractive power and comprising an image-side surface which is convex in a paraxial region; a fourth lens having refractive power; a fifth lens having refractive power and comprising an image-side surface which is concave in the paraxial region; a sixth lens having refractive power; and a stop disposed in front of an object-side surface of the first lens. The first to sixth lenses are sequentially disposed from an object side. A radius of the stop SD and an overall focal length of the optical system f satisfy: 0.2<SD/f<0.6. An aberration improvement effect and high degrees of resolution and brightness may be obtained.

Claims45

Dependent claims

An optical system comprising:

a first lens having refractive power;
a second lens having refractive power;
a third lens having refractive power and a convex image-side surface;
a fourth lens having refractive power;
a fifth lens having refractive power and a concave image-side surface;
a sixth lens having refractive power;
and
a stop disposed in front of the first lens,
wherein the first to sixth lenses are sequentially disposed from an object side, and
wherein a radius of the stop SD and an overall focal length of the optical system f satisfy:
0.2<SD/f<0.6.

8 more elements

Dependencies are inferred from the claim text.

Optical system

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Optical system

Life of this patent

Abstract

Claims45