Interferometric sensing for measuring the complex amplitudes of a 3-D object by R, G and B tunable lasers

Jun Sato; Yukihiro Ishii

doi:10.1117/12.768578

24 January 2008 Interferometric sensing for measuring the complex amplitudes of a 3-D object by R, G and B tunable lasers

Jun Sato, Yukihiro Ishii

Author Affiliations +

Proceedings Volume 6829, Advanced Materials and Devices for Sensing and Imaging III; 682927 (2008) https://doi.org/10.1117/12.768578
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

A color digital Fresnel hologram has been recorded those complex amplitudes can be measured by six-step phase-shifting interferometry with the wavelength shifts of R, G and B tunable lasers. A six-step calculation is insensitive to the power change in tunable lasers. The wavelengths can be tuned by a current change of a red laser diode (LD), a cavity-length change of a green laser and an angle change in a grating of a Littman-type blue LD. Three monochromatic images are reconstructed from the numerical Fresnel diffraction integral and combined into a full-color image with CIE chromaticity. The experimental result of a full-color image reconstruction based on digital holography is shown.

Citation Download Citation

Jun Sato and Yukihiro Ishii "Interferometric sensing for measuring the complex amplitudes of a 3-D object by R, G and B tunable lasers", Proc. SPIE 6829, Advanced Materials and Devices for Sensing and Imaging III, 682927 (24 January 2008); https://doi.org/10.1117/12.768578

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