Patent ID: 8749897

Claim:
A lens system, comprising: a first lens having a concave aspheric surface having a radius R2; a second lens having a convex aspheric surface having a radius R3 facing the first lens; and a third lens having a convex aspheric surface having radius R6; wherein the lens system satisfies the following conditions: R 2/Gap>1 and ABS( R 3 /R 2)>1.28; 1<ABS( R 6 /R 2)<1.1 and R 6<0; V 2 <V 1 and V 2 <V 3; wherein: i) Gap is a distance from a center of curvature of the concave aspheric surface of the first lens to a center of curvature of the convex aspheric surface of the second lens; (ii) ABS denotes absolute value; and (iii) V1 is an Abbe number of the first lens, V2 is an Abbe number of the second lens, and V3 is an Abbe number of the third lens.