Patent ID: 8526125

Claim:
A lens system, in the order from the object-side to the image-side of the lens system, comprising: a first single lens having positive refraction power, the first lens, in order from the object-side to the image-side of the lens system, comprising a first surface and a second surface; a second single lens having positive refraction power; and an image plane; wherein the lens system satisfies the following conditions: D/TTL> 1.18; 1.5 <F 1/ F <1.7; 0.15 <R 2/( F 1) 2 <0.25; wherein, D is a diameter of an effective imaging range of the image plane; TTL is a total length of the lens system, R 2 is a radius of curvature of the second single surface, F 1 is a focal length of the first single lens; F is a focal length of the lens system.