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http://dx.doi.org/10.3795/KSME-B.2008.32.10.784

Validation Experiments for the Determination of Particle Focal Positions in Digital Particle Holography  

Yang, Yan (전남대학교 기계공학과)
Kang, Bo-Seon (전남대학교 기계시스템공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.32, no.10, 2008 , pp. 784-790 More about this Journal
Abstract
The feasibility and the accuracy of the correlation coefficient(CC) method for the determination of particle positions along the optical axis in digital particle holography were verified by alidation experiments. A traverse system with capable of high precision was used to move the particle objects by exact known distances between several different positions. The particle positions along the optical axis were calculated by the CC method and compared with their exact values to obtain the errors of the focal plane determination. The tested particles were 2D dots in a calibration target along with different sized glass beads and droplets that reflected and caused a three-dimensional effect. The results show that the CC method can work well for both the 2D dots and the 3D particles. The effect of other particles on the focal plane determination was also investigated. The CC method can locate the focal plane of particles with a high precision, regardless of the existence of other particles.
Keywords
Digital Particle Holography; Focal Plane; Correlation Coefficient Method;
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