Patent ID: 8649113
Filing Date: 2014-02-11
Classification: G02B

Abstract:
1. An optical image capturing lens system comprising, in order from an object side to an image side: a first lens element with negative refractive power having a convex object-side surface at a paraxial region and a concave image-side surface at the paraxial region; a second lens element with positive refractive power; a third lens element with negative refractive power; a fourth lens element with positive refractive power having a convex image-side surface at the paraxial region; a fifth lens element with negative refractive power having a convex object-side surface at the paraxial region as well as a concave at the paraxial region and convex at a peripheral region image-side surface, at least one of an object-side surface and the image-side surface thereof being aspheric, and the fifth lens element is made of plastic; and wherein the lens elements of the optical image capturing lens system with refractive power are the first lens element, the second lens element, the third lens element, the fourth lens element and the fifth lens element; wherein a focal length of the optical image capturing lens system is f, a focal length of the first lens element is f1, an axial distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element of the optical image capturing lens system is Td, a sum of central thicknesses of all lens elements with refractive power of the optical image capturing lens system is ΣCT, a central thickness of the fourth lens element is CT4, and they satisfy the following relations: