Patent ID: 8508861

Claim:
An image lens assembly comprising five lens elements with refractive power, in order from an object side to an image side: a first lens element with negative refractive power having a concave image-side surface; a second lens element with positive refractive power having a convex image-side surface; a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a fourth lens element with negative refractive power; and a fifth lens element with positive refractive power; wherein a radius of the curvature of the image-side surface of the third lens element is R 6 , a radius of the curvature of the object-side surface of the fourth lens element is R 7 , an axial distance between the second lens element and the third lens element is T 23 , a central thickness of the second lens element is CT 2 , a focal length of the image lens assembly is f, a focal length of the first lens element is f 1 , a focal length of the second lens element is f 2 , and they satisfy the following relations: | R 6 /R 7|<0.85; 0 <T 23 /CT 2<1.0; and 0.7 <|f/f 1 |+f/f 2<2.4.