Patent ID: 8422146

Claim:
An imaging lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power comprising a convex object-side surface; a second lens element with negative refractive power comprising a concave object-side surface and a concave image-side surface; a third lens element with positive refractive power comprising a concave aspheric object-side surface and a convex aspheric image-side surface; and a fourth lens element with negative refractive power comprising a concave aspheric object-side surface and a concave aspheric image-side surface, at least one of the object-side surface and the image-side surface comprising at least one inflection point; wherein following conditions are satisfied: 1.0 <T 12 /CT 2 <3.0; 25 <V 1 −V 2 <60; 0 <f 3 /f 1 <0.75; wherein T 12 is an axial distance between the first lens element and the second lens element, CT 2 is a central thickness of the second lens element, V 1 is the Abbe number of the first lens element, V 2 is the Abbe number of the second lens element, f 1 is the focal length of the first lens element, and f 3 is the focal length of the third lens element.