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

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Li, Beiwen
Gibson, John
Middendorf, Jill
Wang, Yajun
Zhang, Song
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Mechanical Engineering
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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.


This is a conference proceeding from Dimensional Optical Metrology and Inspection for Practical Applications II 8839 (2013): 1, doi:10.1117/12.2022225. Posted with permission.

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Tue Jan 01 00:00:00 UTC 2013