Patent ID: 8482864

Claim:
A compact imaging lens assembly including, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface and a concave image-side surface, at least one of the object-side and image-side surfaces thereof being aspheric; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface, at least one of the object-side and image-side surfaces thereof being aspheric; and an aperture stop disposed between the first lens element and the second lens element; wherein there are only two lens elements with refractive power; and wherein a focal length of the compact imaging 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 , a radius of curvature of the object-side surface of the second lens element is R 3 , a radius of curvature of the image-side surface of the second lens element is R 4 , a thickness of the second lens element on the optical axis is CT 2 , an electronic sensor is provided for the image formation of an object on the image plane in the compact imaging lens assembly, a distance on the optical axis between the aperture stop and the electronic sensor is SL, a distance on the optical axis between the object-side surface of the first lens element and the electronic sensor is TTL, and they satisfy the following relations: −1.20<f/f 2 <−0.10, 0.20<R 3 /R 4 <0.60, 0.20<CT 2 /f<0.70, 0.60<SL/TTL<0.90, −0.34<f 1 /f 2 <−0.06, wherein the first lens element has aspheric object-side and image-side surfaces and is made of plastic material; wherein the second lens element has aspheric object-side and image-side surfaces and is made of plastic material.