1455 回折格子を利用したインラインホログラフィによる3次元位置計測(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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In order to measure 3D flow in a micro-channel, 3D position of tiny tracer particles should be measured precisely. The inline-holography is one of the promising techniques to apply to the measurement, although its axial resolution is not sufficiently high. This paper proposes a stereo-inline holographic method to improve measurement precision of the axial direction. The stereo-inline holography system proposed here is simplified by introducing a diffraction grid plate. Since the diffraction grid could degrade the coherency of the laser beam, influence of the diffraction grid on the holographic interference pattern of tracer particles are examined. Influence of the disturbance on the laser light is clearly appeared in the fringe pattern, but influence on the reconstructed particle images is almost negligible. In this paper, both a transmission and a reflection types of diffraction grid plates are examined their adequacy for the stereo-inline holography system. By applying the optical system and inline holography method to measure a micro channel flow measurement, particle positions in a small channel and velocities of particles are successfully measured.
社団法人日本機械学会の論文
2007-09-07