Journal
OPTICS LETTERS
Volume 35, Issue 24, Pages 4121-4123Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.004121
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Recently, a study showed that generating sinusoidal fringe patterns by properly defocusing binary ones can significantly simplify three-dimensional shape measurement system development and drastically improve its speed. However, when the fringe stripes are very wide, it is very difficult for this technique to achieve high-quality measurement. This Letter presents a method to improve this technique by selectively eliminating high-frequency harmonics induced by a squared binary pattern. As a result, better sinusoidal fringe patterns can be generated with a small degree of defocusing even for wide fringe stripes. Simulation and experiments will be presented to verify the performance of this proposed technique. (C) 2010 Optical Society of America
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