Patent ID: 7646531
Filing Date: 2010-01-12
Classification: G02F,H04N

Abstract:
1. A laser projection system comprising a laser source, a wavelength conversion device, and beam projection optics, wherein: the wavelength conversion device comprises an input face, an output face, and a waveguide region extending from the input face to the output face; the waveguide region is confined between a pair of cladding layers and comprises a relatively linear waveguide portion and a pair of lateral planar waveguide portions; the output face of the wavelength conversion device comprises a multi-component output face comprising a core portion and a pair of lateral portions; the core portion of the output face is configured to be relatively transmissive to an optical signal propagating from the input face to the output face along the waveguide region; the lateral portions of the output face are configured to be relatively non-transmissive to an optical signal propagating from the input face to the output face along the waveguide region; the waveguide region is structured such that an optical signal propagating from the input face to the output face along the waveguide region will define a relatively high intensity spot in substantial alignment with the relatively linear waveguide portion along the core portion of the output face and will be subject to a degree of scattering to define relatively low intensity laterally distributed parasitic light in substantial alignment with the lateral planar waveguide portions along the lateral portions of the output face; and the beam projection optics are structured to project the optical signals towards an image field of the laser projection system.