Patent ID: 8345359

Claim:
A lens system, in the order from the object-side to the image-side of the lens system, comprising: a first lens with positive refraction power, from the object-side to the image-side of the lens system, comprising a first surface and a second surface; a second lens with positive refraction power; a third lens with negative positive refraction power; and an image plane; wherein the lens system satisfies the following conditions: 0.26 <R 1 /F 1<0.35; and −0.65 <R 2 /F 2<−0.35; wherein, R 1 is a radius of curvature of the first surface; F 1 is a focal length of the first lens; R 2 is a radius of curvature of the second surface; F 2 is a focal length of the second lens.