Patent ID: 9122046
Filing Date: 2015-09-01
Classification: G02B

Abstract:
1. An imaging lens, comprising in sequence from an object side to an image side: a first lens, having at least one aspheric surface; a second lens, having negative optical power and comprising at least one aspheric surface and a convex surface of the second lens is facing toward the object side; a third lens, having positive optical power and comprising at least one aspheric surface and a concave surface of the third lens is facing toward the object side; a fourth lens, having negative optical power and comprising at least one aspheric surface and a concave surface of the fourth lens is facing toward the image side; and a fifth lens, having positive optical power and comprising at least one aspheric surface and a convex surface of the fifth lens is facing toward the object side, wherein the imaging lens has a focal length f, and the first lens has a focal length f1, a focal length of the fourth lens is f4, and a focal length of the fifth lens is f5, which satisfy: