Superfast phase-shifting method for 3-D shape measurement - PubMed

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• PMID: 20588818
• DOI: 10.1364/OE.18.009684

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Superfast phase-shifting method for 3-D shape measurement

Song Zhang et al. Opt Express. 2010.

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Abstract

Recently introduced DLP Discovery technology allows for tens of kHz binary image switching, which has great potential for superfast 3-D shape measurement. This paper presents a system that realizes 3-D shape measurement by using a DLP Discovery technology to switch binary structured patterns at very high frame rates. The sinusoidal fringe patterns are generated by properly defocusing the projector. Combining this approach with a phase-shifting method, we achieve an unprecedented rate for 3-D shape measurement: 667 Hz. This technology can be applied to numerous applications including medical science, biometrics, and entertainment.

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