Superfast phase-shifting method for 3-D shape measurement.
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.
Zhang
Song
S
Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA. song@iastate.edu
Van Der Weide
Daniel
D
Oliver
James
J