Patent ID: 6771870
Filing Date: 2004-08-03
Classification: G02B,Y10S

Abstract:
A Projection display system comprising:a lamp-reflector combination for collection of electromagnetic energy emitted from a lamp having an electromagnetic energy emission source S and for concentration of a portion of said collected energy, thus forming a respective spatial and angular reformatted secondary source Sâ€²; a hollow reflective tube having a rectangular cross section at its output port and having an input side located near said secondary source Sâ€²; a configurable illumination target comprising at least one configurable pixel generating at least one processed output beam; a coupling optic collecting a portion of electromagnetic energy emitted by said hollow reflective tube and providing an illumination beam for said configurable illumination target; and a projection optic collecting a portion of said at least one processed output beam from said configurable illumination target and further including means to translate said collected processed output beam portion into a scaled image of said configurable illumination target at a remote display target; and further characterized by said hollow reflective tube comprising two sub-components having two optical functional surfaces in the form of an â€œLâ€ -like shape, wherein the spectral-and angular dependent reflectivity of said two optical functional surfaces on the inside of said sub-component is substantially equivalent in at least one wavelength interval of interest and at least one angle interval of interest.