Patent ID: 8749897
Filing Date: 2014-06-10
Classification: A61B,G02B

Abstract:
1. 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: 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.