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Proceedings Paper

A new technique for speckle noise reduction of laser projection displays using waveplates
Author(s): Tomoaki Yoshimi; Kenta Chihaya; Wakao Sasaki; Hiroki Matsubara; Atsuya Hirano; Kenji Nagashima
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Paper Abstract

In laser projection displays, countermeasure technique against glares on the screen called speckle noise is one of the focuses. In the experiments, a quarter-waveplate with slow axis rotated by 45 degrees against the polarization axis of the incident green laser source was inserted into the optical path of our laser projection display system. Only in such a setup, an enough coherence alleviation was attained. We have also carried out quantitative evaluations of the speckle noise by overlaying the projected images using a CCD camera on the histogram-based estimations of speckle noise intensities. Noise reduction of about 20% was accomplished.

Paper Details

Date Published: 2 February 2011
PDF: 7 pages
Proc. SPIE 7956, Advances in Display Technologies; and E-papers and Flexible Displays, 79560V (2 February 2011); doi: 10.1117/12.874039
Show Author Affiliations
Tomoaki Yoshimi, Doshisha Univ. (Japan)
Kenta Chihaya, Doshisha Univ. (Japan)
Wakao Sasaki, Doshisha Univ. (Japan)
Hiroki Matsubara, Funai Electric Co., Ltd. (Japan)
Atsuya Hirano, Funai Electric Co., Ltd. (Japan)
Kenji Nagashima, Funai Electric Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 7956:
Advances in Display Technologies; and E-papers and Flexible Displays
Karlheinz Blankenbach; Liang-Chy Chien; Sin-Doo Lee; Ming Hsien Wu, Editor(s)

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