Patent ID: 8810929
Filing Date: 2014-08-19
Classification: G02B

Abstract:
1. An image lens unit, comprising: a first lens having positive (+) power and comprising a convex surface on an object side; a second lens having negative (−) power and comprising a concave surface on an image side; a third lens having positive (+) power and being convex in the center toward the image side; a fourth lens being concave in the center toward the object side and convex in the center toward the image side; a fifth lens having negative (−) power and comprising: an aperture stop disposed between the first lens and the second lens to adjust a light amount, wherein an Abbe number v1 of the first lens, an Abbe number v2 of the second lens and an Abbe number v4 of the fourth lens satisfy the following conditional expression: and 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 to the image side.