The development of liquid-crystal panels for use in commercial equipment has been aimed at improving the pixel resolution and the display efficiency. These improvements have led to a reduction in the thickness of such devices, among other outcomes, that involves a loss in phase modulation. We propose a modification of the classical phase-only filter to permit displays in VGA liquid-crystal panels with a constant amplitude modulation and less than a 2π phase modulation. The method was tested experimentally in an optical setup.
© 2000 Optical Society of America
(100.4550) Image processing : Correlators
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(200.4740) Optics in computing : Optical processing
(230.3720) Optical devices : Liquid-crystal devices
Ignasi Labastida, Arturo Carnicer, Estela Martín-Badosa, Santiago Vallmitjana, and Ignacio Juvells, "Optical Correlation by Use of Partial Phase-Only Modulation with VGA Liquid-Crystal Displays," Appl. Opt. 39, 766-769 (2000)