High-speed parallel phase-shifting digital holography system using special-purpose computer for image reconstruction

Takashi Kakue; Tomoyoshi Shimobaba; Tomoyoshi Ito

doi:10.1117/12.2177519

22 May 2015 High-speed parallel phase-shifting digital holography system using special-purpose computer for image reconstruction

Takashi Kakue, Tomoyoshi Shimobaba, Tomoyoshi Ito

Author Affiliations +

Proceedings Volume 9495, Three-Dimensional Imaging, Visualization, and Display 2015; 94950N (2015) https://doi.org/10.1117/12.2177519
Event: SPIE Sensing Technology + Applications, 2015, Baltimore, MD, United States

Abstract

We report a high-speed parallel phase-shifting digital holography system using a special-purpose computer for image reconstruction. Parallel phase-shifting digital holography is a technique capable of single-shot phase-shifting interferometry. This technique records information of multiple phase-shifted holograms required for calculation of phase-shifting interferometry with a single shot by using space-division multiplexing. This technique needs image-reconstruction process for a huge amount of recorded holograms. In particular, it takes a long time to calculate light propagation based on fast Fourier transform in the process and to obtain a motion picture of a dynamically and fast moving object. Then we designed a special-purpose computer for accelerating the image-reconstruction process of parallel phase-shifting digital holography. We developed a special-purpose computer consisting of VC707 evaluation kit (Xilinx Inc.) which is a field programmable gate array board. We also recorded holograms consisting of 128 × 128 pixels at a frame rate of 180,000 frames per second by the constructed parallel phase-shifting digital holography system. By applying the developed computer to the recorded holograms, we confirmed that the designed computer can accelerate the calculation of image-reconstruction process of parallel phase-shifting digital holography ~50 times faster than a CPU.

Citation Download Citation

Takashi Kakue, Tomoyoshi Shimobaba, and Tomoyoshi Ito "High-speed parallel phase-shifting digital holography system using special-purpose computer for image reconstruction", Proc. SPIE 9495, Three-Dimensional Imaging, Visualization, and Display 2015, 94950N (22 May 2015); https://doi.org/10.1117/12.2177519

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