Patent ID: 8456763
Filing Date: 2013-06-04
Classification: G02B

Abstract:
1. An imaging optical lens assembly comprising, in order from an object side to an image side: a front lens group, an aperture stop and a rear lens group; wherein the front lens group comprises, in order from the object side to the image side: a first lens element with negative refractive power having a concave image-side surface; a second lens element with negative refractive power having a concave image-side surface; a third lens element with positive refractive power; and a fourth lens element with positive refractive power; wherein the rear lens group comprises, in order from the object side to the image side: a fifth lens element with positive refractive power; and a sixth lens element with negative refractive power; wherein the imaging optical lens assembly is a fixed focal length lens assembly, and the front lens group has a total of four lens elements and the rear lens group has only two lens elements; wherein a distance on the optical axis between the aperture stop and an image plane is SL, a distance on the optical axis between the object-side surface of the first lens element and the image plane is TTL, an image sensor is provided on an image plane, half of a diagonal length of an effective sensing area of the image sensor is ImgH, the focal length of the imaging optical lens assembly is f, the fifth lens element and the sixth lens element are connected to form a doublet; a radius of curvature of the image-side surface of the second lens element is R