Bo-Seon Kang

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The correlation coefficient (CC) method, which was proposed by our research group, is applied to digital particle holography to locate the focal plane of particles. It uses the fact that the CC is maximum at the focal plane. The factors influencing this method are discussed with a numerical simulation of holograms. For real holograms, the Wiener filter was(More)
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 validation experiments. A translation system capable of high precision was used to move the particle objects by exact known distances between several different(More)
As the obligatory use of Active-X and authentication certificate is recently abolished in the country, fintech technology newly receives the attention which enables the easy payment. But, PW based user authentication system is not free from the hacking threat that the third party falsifies the parameter values for the parameter values. In addition, the(More)
This study presents in-line digital particle holography and its application to spray droplets to measure the characteristics of spray droplets. Several important parameters at the time of hologram recording such as the pixel number of holograms, the object distance, and the part of laser beam used were verified. The optimum values of all these parameters(More)
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