Patent ID: 7012721
Filing Date: 2006-03-14
Classification: G02B

Abstract:
1. An optical imaging system comprising: a rod lens array comprising a plurality of rod lenses having a refractive index distribution in a radial direction that are arranged in two rows with their optical axes in parallel, and a manuscript plane and an image plane that are located on opposite sides of the rod lens array, wherein the refractive index distribution of the rod lenses is expressed by  where r is a radial distance from an optical axis of the rod lenses, n when h the spheroid is defined by a vector X* that is expressed by  where O* is a vector from an origin of the Cartesian coordinate system to a center of the spheroid, A*, B* and C* are vectors in the directions of a major axis, a mean axis and a minor axis of the spheroid, respectively, and k