Projection apparatus and hologram recording medium
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United States of America Patent
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Oct 6, 2015
Grant Date -
Nov 20, 2014
app pub date -
Sep 18, 2012
filing date -
Sep 16, 2011
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Abstract
A projection apparatus has a hologram recording medium configured to be capable of diffusing coherent light beams, an irradiation unit configured to irradiate coherent light beams to the hologram recording medium so that the coherent light beams scan the hologram recording medium, a light modulator that is illuminated by coherent light beams incident on and diffused at respective points of the hologram recording medium from the irradiation unit, a projection optical system configured to project a modulated image generated by the light modulator onto a scattering plane, and an imaging optical system provided between the hologram recording medium and the light modulator, configured to converge the coherent light beams diffused at respective points of the hologram recording medium to illuminate the light modulator.
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