Journal of Physical Chemistry & Biophysics
Open Access

High resolution phase shifting methods in multiple beam holographic interferometry

International Conference and Trade fair on Laser Technology

July 20-22, 2015 Orlando, Florida, USA

Pramod Rastogi

Scientific Tracks Abstracts: J Phys Chem Biophys

Abstract :

This talk reviews high resolution phase shifting methods which have the capability of accommodating the requirements inherent in multiple beam holographic interferometry. These methods facilitate the use of multiple PZTs in an optical setup, offer the flexibility of using arbitrary phase steps and spherical beams, and provide the ability of making simultaneous multidimensional deformation measurements. The main sources of errors in implementing phase stepping are caused by the miscalibration of the piezo electric device (PZT) and by the presence of non-sinusoidal waveforms (consequence of CCD nonlinearity or multiple reflections inside the laser cavity). The proposed phase stepping methods render the holography related interferometry techniques insensitive to the error sources mentioned above. Experimental results show the feasibility of the proposed methods.

Biography :

Pramod Rastogi is the author of more than 150 scientific papers published in peer-reviewed archival journals, and has edited eight books. He is a Fellow of the Optical Society of America and a Fellow of the Society of the Photo-Optical Instrumentation Engineers. He is a recipient of the �??Hetényi Award�?� for the most significant research paper published in Experimental Mechanics in the year 1982; a recipient of the SPIE Dennis Gabor Award in the year 2014, and is a member of the Swiss Academy of Engineering Sciences. He is the Editor-in-Chief of the International journal of Optics and Lasers in Engineering, Elsevier.