Patent ID: 8514502
Filing Date: 2013-08-20
Classification: G02B,H04N

Abstract:
1. An imaging lens system including, 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 image-side surface; a third lens element; a fourth lens element with positive refractive power having a concave object-side surface and a convex image-side surface; a fifth lens element with negative refractive power having a concave image-side surface, at least one surface thereof being provided with at least one inflection point; and an aperture stop disposed between an imaged object and the third lens element; wherein an on-axis spacing between the first lens element and the second lens element is T12, a focal length of the imaging lens system is f, a radius of curvature of the image-side surface of the second lens element is R4, and T12, f, and R4 satisfy the relations: 0.5<(T12/f)×100<15; and 0.7<R4/f<1.2.