Patent ID: 6734889
Filing Date: 2004-05-11
Classification: B41J

Abstract:
A printer for printing on a light sensitive medium comprising:a plurality of light sources which produce a plurality of light beams; illumination optics comprising cross array components and array direction components for reducing divergence of said beams from said light; wherein said illumination optics flood illuminates at least one grating modulator array with reduced light beams; an address means connected to said grating modulator array for individually addressing modulator sites on said prating modulator array for imparting a phase change to said reduced light beams; an imaging lens which directs light from said grating modulator array onto said light sensitive media comprised of: a first lens element which converts said light into diffracted and undiffracted light; a spatial filter which discriminates between said diffracted and said undiffracted light; a second lens element which reconstructs an image of said modulator sites; and wherein said spatial filter is comprised of a two arrangement of slits wherein said slits are displaced along a first direction to filter specific wavelengths and are displaced along a second direction to filter specific diffractive orders.