Patent ID: 8462449

Claim:
An optical lens assembly comprising, in an order from an object side to an image side: a first lens element with positive refractive power, wherein the object-side surface of the first element is convex; a second lens element with negative refractive power, wherein the object-side surface of the second element is concave, the image-side surface of the second lens element is convex, the second lens element is made of plastic, and the object-side and the image-side surfaces of the second lens element are aspheric; and a third lens element with positive refractive power, wherein the object-side surface of the third element and the image-side surface of the third lens element are convex; wherein, there are only three lens elements with refractive power in the optical lens assembly, T 12 is an axial distance between the first lens element and the second lens element; CT 1 is a central thickness of the first lens element; f 1 is a focal length of the first lens element; R 2 is a radius of curvature of the image-side surface of the first lens element; CT 3 is a central thickness of the third lens element, ΣCT is the sum of the central thicknesses of the first lens element, the second lens element and the third lens element, R 3 is a radius of curvature of the object-side surface of the second lens element, and R 4 is a radius of curvature of the image-side surface of the second lens element, and following conditions are satisfied: 0.9 <T 12 /CT 1 <1.4; −0.4 <f 1 /R 2 <0.6; 0.45 <CT 3 /ΣCT< 0.75; and −6.0<( R 3 +R 4)/( R 3 −R 4)<−3.0.