Patent ID: 7495833
Filing Date: 2009-02-24
Classification: G02B,H04N

Abstract:
1. A scanned beam source comprising: a light generator operable to generate a composite beam of light comprising a first plurality of wavelength components; a first beam shaping optical element aligned to receive the composite beam of light from the light generator; a second beam shaping optical element aligned to receive the composite beam of light from the first beam shaping optical element and configured to modify the first plurality of wavelength components of the composite beam to a second plurality of dimensions proportional to wavelength; a beam scanner aligned to receive the composite beam from the second beam shaping optical element and operable to scan the composite beam in a periodic pattern; and an exit pupil expander aligned to receive the scanned composite beam from the beam scanner and configured to project an expanded composite beam into a viewing region, wherein the second plurality of dimensions are selected to cooperate with the exit pupil expander to reduce an intensity non-uniformity in the viewing region compared to a scanned beam source lacking the second optical element.