Patent ID: 8693111
Filing Date: 2014-04-08
Classification: G02B,H04N

Abstract:
1. An imaging lens system including, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface; a second lens element with negative refractive power; a third lens element; a fourth lens element having a convex image-side surface; and a fifth lens element having an object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric, at least one surface thereof being provided with at least one inflection point; wherein the lens elements with refractive power in the imaging lens system are only the first, second, third, fourth and fifth lens elements; a focal length of the imaging lens system is f, a focal length of the first lens element is f1, an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, and the following relations are satisfied: