Patent ID: 8508860
Filing Date: 2013-08-13
Classification: G02B

Abstract:
1. An optical lens system comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a fourth lens element; and a fifth lens element having a convex object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric and at least one inflection point being formed on the image-side surface, wherein the optical lens system is further provided with a stop disposed between an object and the third lens element, and an electronic sensor disposed at an image plane for the image formation of the object; a focal length of the optical lens system is f; a focal length of the third lens element is f