抄録
In this study, high spatial resolution measurement technique for three-dimensinal velocity distributions was examined. The Holographic Particle Image Velocimetry (HPIV) was the technique to record the three-dimensional position of the tracer particle on the hologram. From the 3 dimensional holographic particle images 3 dimensional velocity distribution could be calculated whith high-spatial resolution. Ordinaly the HPIV use the Phase-conjugated configuration to reconstruct the 3 dimensional particl position. Though with the technique the particle locations could be obtained with high S/N ration and high spatial resolution, the technique had very complicated caribration procedure and sensitivity. Therefore, in this study using the virtual image, more simple extracting technique to reconstruct particle locations were examined. The technique were simple in lyaout and had good S/N ratio and spatial resolution. Using the holographic particle images, 3 dimensional velocity could be obtained with high accuracy. In the experiment, the technique were applyed to measure upword air jet. The 3 dimensional particle locations were well extracted. Using the extracted particl locations, the 3 dimensional velocity could be calculated well showing the effectiveness of the technique.
