Multi-parameter motion-picture recording with wide space-bandwidth by parallel phase-shifting digital holography

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High-speed multicolor 3D motion-picture recording of a 3D object was experimentally demonstrated by using multiwavelength parallel phase-shifting digital holography. Parallel phase-shifting digital holography is a technique for obtaining the complex amplitude distribution of an object wave from a single hologram, based on space-division multiplexing of multiple phase-shifted holograms. The combination of parallel phase-shifting with angular multiplexing is proposed to capture multicolor information simultaneously using a monochromatic image sensor. 3D space, phase, and wavelength information is simultaneously reconstructed by recording a monochromatic hologram using an image sensor with polarization-detection function. Color 3D motion-picture recording of objects that move at the speed of more than 20 km/h was achieved at 20,000 frames per second. This result is the first experimental demonstration of multiwavelength parallel phase-shifting digital holography.

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