Dr. Yasuhiro Awatsuji
Professor, Kyoto Institute of Technology
3D motion picture of transparent gas flow by parallel phase-shifting digital holography
Parallel phase-shifting digital holography is a technique capable of recording three-dimensional (3D) motion picture of dynamic object, quantitatevely. This technique can record single hologram of an object with an image sensor having a phase-shift array device and reconstructs the instantaneous 3D image of the object with a computer. In this technique, a single hologram in which the multiple holograms required for phase-shifting digital holography are multiplexed by using space-division multiplexing technique pixel by pixel. We demonstrate 3D motion picture of transparent gas flow recorded and reconstructed by the technique. 3D motion picture of the flow at 180,000 frames/s was successfully obtained.
Yasuhiro Awatsuji received the BE, ME and DE degrees in applied physics from Osaka University, in 1992, 1994 and 1997, respectively. He was a research associate with the Division of Information and Production Science, Kyoto Institute of Technology from 1997 to 2005. He was an Associate Professor with the Department of Electronics and Information Science, Kyoto Institute of Technology in 2005. Also he was a researcher with the Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency from 2005 to 2009. He was an Associate Professor with the Division of Electronics, Graduate School of Science and Technology from 2005 to 2014. He has been a Professor with the Division of Electronics, Graduate School of Science and Technology, Kyoto Institute of Technology since 2014. His research interests are in the area of information optics with emphasis on holography. He is also interested in the area of three-dimensional display, three-dimensional measurement, quantitative phase measurement, visualization of invisible information, ultrafast optics, optics design, optical information processing, and optical parallel computing. He is a member of the Optical Society (OSA), the International Society for Optics and Photonics (SPIE), the Japan Society of Applied Physics, the Optical Society of Japan, and the Society of Photographic Science and Technology of Japan.