Patent ID: 8179470

Claim:
An image-capturing lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with positive refractive power having a concave object-side surface and a convex image-side surface, the object-side and image-side surfaces thereof being aspheric; a fourth lens element with negative refractive power having a concave image-side surface on which at least one inflection point is formed, the object-side and image-side surfaces thereof being aspheric; and a stop disposed between an imaged object and the first lens element; wherein there are four lens elements with refractive power; and wherein a focal length of the image-capturing lens assembly is f, a focal length of the third lens element is f 3 , a focal length of the fourth lens element is f 4 , a refractive index of the first lens element is N 1 , a refractive index of the second lens element is N 2 , a thickness of the second lens element near the optical axis is CT 2 , a thickness of the third lens element near the optical axis is CT 3 , an Abbe number of the first lens element is V 1 , an Abbe number of the second lens element is V 2 , a radius of curvature of the object-side surface of the first lens element is R 1 , a total track length of the image-capturing lens assembly is TTL, a distance near the optical axis between the stop and an image plane is SL, and they satisfy the relations: 0.00<f/f 3 <0.95, −1.00<f/f 4 <−0.01, |N 1 −N 2 |<0.12, 3.0<(CT 3 /f)*100<20.0, 30.5<V 1 −V 2 <42.0, 0.20<R 1 /f<0.60, 0.20 mm<(CT 2 /f)*TTL<0.73 mm, 0.93<SL/TTL<1.07.