A diffuser panel having a plurality of micro lenses arranged on a surface
of a substrate, a half or more of these micro lenses are in a shape which
has (2n+1) angles. This diffuser panel provides rays which are uniformly
diffused within a diffusion area and a light amount distribution which
changes smoothly. This diffuser panel provides a bright image having a
naturally blurred impression when the diffuser panel is used as a
focusing panel of an optical apparatus.