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Proceedings Paper

Liquid crystal projection image depixelization by spatial phase scrambling
Author(s): Xiangyang Yang; Nan Li; Suganda Jutamulia
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Paper Abstract

A technique to remove the pixel structure by randomly scrambling the relative phase among the multiple spatial spectra is described. Due to the pixel structure of the liquid crystal display panel, multiple spectra are generated at the Fourier spectrum plane (usually at the back focal plane of the imaging lens). A transparent phase mask is placed at the Fourier spectrum plane such that each spectral order is modulated by one of the subareas of the phase mask. The thickness of these phase mask subareas are randomly assigned and the phase delay resulted from each pair of subareas is longer than the coherent length of the light source, which is about one micron for white light. Such a phase scrambling eliminates the coherence between different spectral orders, therefore, the reconstructed images from the multiple spectra will superimpose incoherently and the pixel structure will not be observed in the projection image.

Paper Details

Date Published: 29 March 1996
PDF: 11 pages
Proc. SPIE 2650, Projection Displays II, (29 March 1996); doi: 10.1117/12.236999
Show Author Affiliations
Xiangyang Yang, Univ. of New Orleans (United States)
Nan Li, Univ. of New Orleans (United States)
Suganda Jutamulia, Kowa Co., Ltd. (United States)

Published in SPIE Proceedings Vol. 2650:
Projection Displays II
Ming Hsien Wu, Editor(s)

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