| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
Digital holography based particle image velocimetry still suffers from poor resolution of particle depth detection, partly because of the existence of imaginary twin images and DC term background image. The new idea of the present work is to use the phase-shifting interferometry based digital holography in stead of the in-line one without using the mechanical phase-shifting system. To do so it resorted to the use of a Heterodyne interferometry based phase-shifting system, which had been expected to and did work with higher capture frequency without loss of spatial resolution.
Another issue of the digital holography based particle image velocimetry is the precision of the particle depth detection schemes from the reconstructed image. To overcome this difficulty, the present work introduced a new concept skewness factor regarding the morphological feature of the particle luminosity peaks and this new parameter did work successfully to measure the exact particle depth without ambiguity.
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