Removal of speckle using a computer generated random phase hologram plate in green wavelength (532 nm)

Sung Chul Shin; Young Woon Kim

doi:10.1117/12.673500

1 September 2006 Removal of speckle using a computer generated random phase hologram plate in green wavelength (532 nm)

Sung Chul Shin, Young Woon Kim

Proceedings Volume 6288, Current Developments in Lens Design and Optical Engineering VII; 62880W (2006) https://doi.org/10.1117/12.673500
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

Citation Download Citation

Sung Chul Shin and 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); https://doi.org/10.1117/12.673500

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