Patent ID: 7911711

Claim:
A photographing optical lens assembly comprising five lens elements with refractive power, 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 having a concave object-side surface and a concave image-side surface; a third lens element with positive refractive power; a fourth lens element with negative 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; and a fifth lens element having a convex object-side surface and a concave image-side surface on which at least one inflection point is formed, made of plastic; wherein the photographing optical lens assembly further comprises an aperture stop disposed between an imaged object and the third lens element, and an electronic sensor for image formation; wherein the first lens element is the lens element with refractive power closest to the object, and there are at most six lens elements with refractive power; and wherein a radius of curvature on the image-side surface of the second lens element is R4, a focal length of the photographing optical lens assembly is f, an Abbe number of the first lens element is V1, an Abbe number of the second lens element is V2, 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 relation: 0.3< R 4 /f< 30.0; 23.0<V1-V2<45.0; 0.65 <SL/TTL< 1.10.