Journal
OPTICS LETTERS
Volume 36, Issue 23, Pages 4518-4520Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.36.004518
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This Letter investigates the effects of different phase-shifting algorithms on the quality of high-resolution three-dimensional (3-D) profilometry produced with nearly focused binary patterns. From theoretical analyses, simulations, and experiments, we found that the nine-step phase-shifting algorithm produces accurate 3-D measurements at high speed without the limited depth range and calibration difficulties that typically plague binary defocusing methods. We also found that the use of more fringe patterns does not necessarily enhance measurement quality. (C) 2011 Optical Society of America
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