1 September 2006 Removal of speckle using a computer generated random phase hologram plate in green wavelength (532 nm)
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Abstract
This paper investigates the qualified method of the removal of hot spot speckle produced by a green laser with long coherence length for a projection display system. The application of a random phase plate using a binary computer generated hologram pattern is successfully applied to reduce the speckle contrast ratio to 2%; this is below the minimum level of 4% which can be recognized by the human eye.
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Sung Chul Shin, Young Woon Kim, "Removal of speckle using a computer generated random phase hologram plate in green wavelength (532 nm)", Proc. SPIE 6288, Current Developments in Lens Design and Optical Engineering VII, 62880W (1 September 2006); doi: 10.1117/12.673500; https://doi.org/10.1117/12.673500
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