Patent ID: 8363337
Filing Date: 2013-01-29
Classification: G02B

Abstract:
1. An imaging 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; a third lens element having a concave object-side surface; a fourth lens element with positive refractive power having a convex image-side surface, at least one of the object-side and image-side surfaces thereof being aspheric; and a fifth lens element with negative refractive power having a concave image-side surface on which at least one inflection point is formed; wherein the imaging lens assembly further comprises an aperture stop disposed between the imaged object and the second lens element, and an electronic sensor for image formation; and wherein 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, a distance between the object-side surface of the first lens element and the image-side surface of the fifth lens element is Td, a focal length of the imaging lens assembly is f, and they satisfy the relations: 0.75<SL/TTL <1.20, 0.70<Td/f≦0.79.