Patent ID: 8773781
Filing Date: 2014-07-08
Classification: G02B

Abstract:
1. An image lens, comprising: a first lens having positive (+) power and a biconvex shape; a second lens having negative (−) power and comprising a concave surface on an image side; a third lens having positive (+) power and a biconvex shape; a fourth lens having positive (+) power and comprising a concave surface on the object side and a convex surface on the image side; and a fifth lens having negative (−) power and comprising an image side surface being concave in the center and convex at the periphery, wherein a radius of curvature of an object-side surface of the fifth lens is greater than a radius of curvature of an image-side surface of the fifth lens, wherein the first lens, the second lens, the third lens, the fourth lens, and the fifth lens are arranged in order from the object side toward the image side, and a distance TTL on an optical axis from an object-side surface of the first lens to an image sensor and a total focal length f of the imaging lens satisfy the following conditional expression: