S. Zhang, D. van der Weide, and J. Oliver "Superfast phase-shifting method for 3-D shape measurement," Opt. Express18(9), 9684-9689, 2010. (Selected for July 6, 2010 issue of The Virtual Journal for Biomedical Optics); doi: 10.1364/OE.18.009684
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.