Patent ID: 7686459
Filing Date: 2010-03-30
Classification: G02B,G03B

Abstract:
1. A lens array optical system comprising: a first lens array that includes a plurality of first lens cells arranged in first and second directions, the first lens array being configured to split a light flux to a plurality of split light fluxes and to condense each split flux; and a second lens array that includes a plurality of second lens cells arranged in the first and second directions, each second lens cell being configured to receive the split lights from each first lens cell, wherein a value made by dividing a width of an arrangement area of the second lens cells by a width of an arrangement area of the first lens cells in the first direction is smaller than a value made by dividing a width of an arrangement area of the second lens cells by a width of an arrangement area of the first lens cells in the second direction, wherein at least one of the first and second lens arrays has a toric surface, and wherein a radius of curvature of the toric surface on a first section parallel to the first direction and the central optical axis direction is greater than that on a second section parallel to the central optical axis direction and the second direction.