Reduction of Ghost Particles by Using Iterative Volumetric Filtering in Tomographic Digital Holography

Shunsuke TANI Yohsuke TANAKA and Shigeru MURATA
Advanced Experimental Mechanics
Vol.1, 155-160, 2016



研究成果

この論文では,ホログラフィの粒子伸び低減について説明しています.この手法によって,ホログラフィが持つ問題の粒子伸びの低減が可能となりました.今後,この手法を用いて微粒子の3次元位置や3次元速度場計測に役立てることが期待されています.

Iterative volumetric filtering

実験装置のように直交する2つのカメラで観測されるそれぞれの再生体積を重ねると,粒子位置で十字型の像が得られます.今回提案したフィルタ処理を行うことで,粒子像が持つ伸びが低減されて,粒子位置特定が容易になります.得られた粒子位置より3次元速度場分布が得られます.

Tomographic Digital Holography

Optical setup for tomographic digital holography

without filter

Without filtering

with filter

With filtering

Settling particles

Three dimensional velocity field of settling particles

関連業績
  1. Calibration along the depth direction in tomographic digital holography
    Shunsuke TANI, Yohsuke TANAKA and Shigeru MURATA
    ICHSIP 31, Paper Number:1B-P06, Suita, Osaka, Japan, November 7-10, 2016.

  2. Reduction of Ghost Particles on Tomographic Digital Holography by Using Iterative Volumetric Filtering
    Shunsuke TANI, Yohsuke TANAKA and Shigeru MURATA 10th International Symposium on Advanced Science and Technology in Experimental Mechanics, Paper Number:58, Matsue, Shimane, Japan, November 1-4, 2015.

  3. Measurement of Three-dimensional Particle Distribution by Tomographic Digital Holography
    Shunsuke Tani, Yohsuke Tanaka and Shigeru Murata ASME-JSME-KSME Joint Fluids Engineering Conference 2015, Seoul, Korea, July 26-31, 2015.

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