題　目：Multidimensional deformation measurements using subspace based methods

報(bào)告人： Prof. Pramod Rastogi
　　　　Applied Computing and Mechanics Laboratory, Ecole Polytechnqie Federale de Lausanne, 1015 Switzerland

時(shí)　間：5月20日（周一）10:00

地　點(diǎn)：宇航學(xué)院會(huì)議室(3-146)


報(bào)告摘要：
　　The information about the displacement and strain is encoded, respectively, in the phase, and its associative derivatives, of a fringe pattern. The potential of digital interferometry has however failed to fully express itself due to the challenges involved in determining simultaneously the three-dimensional components of displacement and strain. Specifically, the applicability of the state-of-the-art optical methods for multi-dimensional deformation measurements is strongly limited by their reliance on sequential operations and complex experimental configurations. Hence, it is essential to develop vastly more targeted ways to address this issue. This has primarily lead to research focused on understanding and implementing processes needed for supporting information embedded in multi-wave interferometers. This talk presents an overview of estimation techniques based on spectral decomposition that have been proposed by the authors to address the problem, and summarizes various aspects based on accuracy and data frames.


報(bào)告人簡(jiǎn)介：
　　Professor Pramod Rastogi’s research activities are principally in the area of holographic interferometry, speckle metrology, fiber optics sensors, phase shifting and moiré.?He is the author or coauthor of more than 145 scientific papers published in peer-reviewed archival journals. He is also the author of book chapters, Encyclopaedia articles, and has edited several books in the field of optical metrology:
* Holographic interferometry-Principles and Methods, Springer-Verlag, 1994;
* Optical Measurement Techniques and Applications, Artech Book House, 1998;
* Photomechanics, Springer-Verlag, 2000;
* Trends in Optical Non-Destructive Testing and Inspection, Elsevier, 2000;
* Digital Speckle Pattern Interferometry and Related Techniques, John Wiley & Sons, 2001.
* Optical Methods for Solid Mechanics: A Full-Field Approach, Physics Textbook, Wiley-VCH, 2012.
　Professor Rastogi is a Fellow of the Optical Society of America (1993) and a Fellow of the Society of the Photo-Optical Instrumentation Engineers (1995).?He is also a recipient of the “Hetényi Award” for the most significant research paper published?in Experimental Mechanics in the year 1982. Professor Rastogi is also the co-editor-in-chief of the International journal of Optics and Lasers in Engineering, Elsevier, London.