Patent ID: 8786966

Claim:
An image lens unit, comprising: a first lens having positive (+) power and being convex toward an object side; a second lens having negative (−) power and being concave toward an image side; a third lens having negative (−) power; a fourth lens being convex toward the image side; a fifth lens having negative (−) power; and an aperture stop disposed in front of the first lens to adjust a light amount, wherein the image lens unit satisfies the following conditional expression: 0.333 < r ⁢ ⁢ 1 f < 0.368 where r1 is a radius of curvature of an object-side surface of the first lens, and f is the overall focal distance of the image lens unit, 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.