Patent ID: 7599132
Filing Date: 2009-10-06
Classification: G02B

Abstract:
1. A wide-angle lens system comprising, in order from the object side to the image side thereof with no intervening lenses: a first lens element having a negative optical power convex to the object side; and a second lens element having a positive optical power; wherein the wide-angle lens system satisfies the following conditions: wherein R1F is the radius of curvature of the object-side surface of the first lens element, R1R is the radius of curvature of the image-side surface of the first lens element, R2F is the radius of curvature of the object-side of the second lens element, R2R is the radius of curvature of the image-side surface of the second lens element,ν1 is Abbe number of the first lens element and ν2 is Abbe number of the second lens element.