Patent ID: 11906705
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An optical system comprising:
a first lens having positive refractive power and comprising a convex object-side surface and a concave image-side surface;
a second lens having refractive power;
a third lens having refractive power and comprising a concave image-side surface;
a fourth lens having positive refractive power;
a fifth lens having negative refractive power;
a sixth lens having positive refractive power; and
a seventh lens having negative refractive power,
wherein the first to seventh lenses are sequentially disposed from an object side, and
wherein |(r7−r8)/(r7+r8)|<1.4 is satisfied, where r7 is a radius of curvature of an object-side surface of the fourth lens, and r8 is a radius of curvature of an image-side surface of the fourth lens.