Dimensional Optical Metrology and Inspection for Practical Applications II
San Diego, CA
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.
Society of Photo-Optical Instrumentation Engineers
Li, Beiwen; Gibson, John; Middendorf, Jill; Wang, Yajun; and Zhang, Song, "Comparison between LCOS projector and DLP projector in generating digital sinusoidal fringe patterns" (2013). Mechanical Engineering Conference Presentations, Papers, and Proceedings. 66.