1454 ディジタルホログラフィ再生過程における深さ方向の粒子像伸長に関する考察(S29-1 流れの多次元計測の展開と応用(1),S29 流れの多次元計測の展開と応用)

概要

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This paper makes a comparison between light intensity and relative phase on the particle image elongation in the reconstruction step of digital holography. Though numerical reconstruction of digital holography is generally performed with the light intensity to carry out some 3D particle measurement, the measurement accuracy in depth position is not so high because the reconstructed particle image greatly elongates in the direction of depth. In addition, the reconstructed images may connect with each other under the environment with high number density. On the other hand, the relative phase is defined as phase difference between the pixel of interest and the background on a reconstructed image plane, and reconstructed images by relative phase have higher contrast than those by light intensity. Numerical simulation and experimental results show that particle image elongation by relative phase is reduced to about 20% of that by light intensity.
社団法人日本機械学会の論文
2007-09-07