Patent ID: 8736980
Filing Date: 2014-05-27
Classification: G02B

Abstract:
1. An imaging lens assembly comprising, in order from an object side to an image side: a first lens element with negative refractive power having an object-side surface being concave at a paraxial region thereof, wherein the object-side surface and an image-side surface of the first lens element are aspheric; a second lens element with refractive power; a third lens element with positive refractive power; a fourth lens element with negative refractive power; and a fifth lens element with positive refractive power having an object-side surface being convex at a paraxial region thereof and an image-side surface being concave at a paraxial region thereof, wherein the object-side surface of the fifth lens element changes from convex at the paraxial region thereof to concave at a peripheral region thereof, and the object-side surface and the image-side surface of the fifth lens element are aspheric; wherein a minimum distance between an optical axis and a non-axial critical point on the object-side surface of the fifth lens element is Yc51, a distance in parallel with the optical axis from the non-axial critical point on the object-side surface of the fifth lens element to an axial vertex on the object-side surface of the fifth lens element is SAGc51, SAGc51/Yc51 is a tangent value of an angle α, and the following relationship is satisfied: