Three-dimensional coherence holography using a commercial projector for display and incoherent illumination of a coherence hologram

Dinesh N. Naik; Takahiro Ezawa; Rakesh Kumar Singh; Yoko Miyamoto; Mitsuo Takeda

doi:10.1117/12.858786

2 August 2010 Three-dimensional coherence holography using a commercial projector for display and incoherent illumination of a coherence hologram

Dinesh N. Naik, Takahiro Ezawa, Rakesh Kumar Singh, Yoko Miyamoto, Mitsuo Takeda

Author Affiliations +

Proceedings Volume 7790, Interferometry XV: Techniques and Analysis; 77900Q (2010) https://doi.org/10.1117/12.858786
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

We propose a simple implementation of off-axis coherence holography with a commercial projector combined with a Sagnac radial shearing interferometer. The projector functions as a device for display and incoherent illumination of a coherence hologram, which permits reconstruction of the hologram with a generic spatially-incoherent quasimonochromatic thermal light source. The Sagnac radial shearing interferometer, with its inherent stability of a common-path interferometer and controllable magnification introduced by variable shear, functions as a device for correlating optical fields to detect the 3-D coherence function that represents the object recorded in the coherence hologram. A set of phase-shifted Fourier transform holograms was displayed sequentially with the projector. The coherence function was detected by applying the phase-shift technique to the Sagnac radial shearing interferometer, and the object was reconstructed as the 3-D correlation map of the fields diffracted from the hologram. The technique can be applied for dispersion-free spatial coherence tomography and profilometry.

Citation Download Citation

Dinesh N. Naik, Takahiro Ezawa, Rakesh Kumar Singh, Yoko Miyamoto, and Mitsuo Takeda "Three-dimensional coherence holography using a commercial projector for display and incoherent illumination of a coherence hologram", Proc. SPIE 7790, Interferometry XV: Techniques and Analysis, 77900Q (2 August 2010); https://doi.org/10.1117/12.858786

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