2013•Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIERequires access

Comparison between LCOS projector and DLP projector in generating digital sinusoidal fringe patterns

Beiwen Li, J. Paul Gibson, Jill M. Middendorf, Yajun Wang, Song Zhang

Abstract

Digital-light-processing (DLP) and liquid-crystal-on-silicon (LCOS) are two digital projection technologies which enjoy great popularity. This paper will demonstrate the performance of the two technologies in generating digital sinusoidal fringe patterns in the two following ways: focused-sinusoidal-patterns (FSP) method and defocused-binary-patterns (DBP) method. Experiment shows that for the FSP method, LCOS projector is a better choice since nonlinear gamma effect is less significant and there is no need for precise synchronization; While for the DBP method, DLP projector has the advantage over LCOS projector since the generated images have higher contrast ratio.

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Available abstract

Key concepts: Liquid crystal on silicon, Projector, Digital Light Processing, Computer science, Computer graphics (images), Projection (relational algebra), Spatial light modulator, Liquid-crystal display