Patent ID: 8164840

Claim:
A photographing optical 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 having a concave object-side surface and a concave image-side surface, the object-side and image-side surfaces thereof being aspheric; a third lens element having a concave image-side surface, the object-side and image-side surfaces thereof being aspheric, at least one inflection point formed on the image-side surface; and wherein there are three lens elements with refractive power; and wherein a distance on the optical axis between the first and second lens elements is T12, a distance on the optical axis between the second and third lens elements is T23, a thickness on the optical axis of the second lens element is CT2, a thickness on the optical axis of the third lens element is CT3, a radius of curvature on the object-side surface of the first lens element is R1, a radius of curvature on the image-side surface of the first lens element is R2, a radius of curvature on the object-side surface of the second lens element is R3, a radius of curvature on the image-side surface of the second lens element is R4, and they satisfy the relations: 0.40 <T 12 /T 23<2.35; 0.50 <CT 3 /CT 2<1.65; −2.00 <R 1 /R 2<0.50; −3.20 <R 3 /R 4<0.00.