Digital holography is an attractive method for instantaneous measurement of three-dimensional (3D) objects and numerical reconstruction of the 3D objects after the recording. The reconstruction can be implemented optically for visualization. In this paper, we review a 3D measurement system based on phase-shifting digital holography and an optical 3D reconstruction based on wavefront modulation. In the 3D reconstruction, phase distribution is used for 3D reconstruction because there is no available spatial light modulator that can modulate both amplitude and phase. The viewing zone is limited by the pixel size of phase-mode spatial light modulator. For enlargement of viewing zone, we have proposed a timesharing method to distribute the reconstructed 3D object in wide area by using a Galvanometer mirror. Numerical and experimental results are presented.
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