G
Gannavarpu Rajshekhar
Researcher at Indian Institute of Technology Kanpur
Publications - 34
Citations - 586
Gannavarpu Rajshekhar is an academic researcher from Indian Institute of Technology Kanpur. The author has contributed to research in topics: Holographic interferometry & Phase (waves). The author has an hindex of 14, co-authored 32 publications receiving 489 citations. Previous affiliations of Gannavarpu Rajshekhar include University of Illinois at Urbana–Champaign & École Polytechnique Fédérale de Lausanne.
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Journal ArticleDOI
Fringe analysis: Premise and perspectives
TL;DR: Keywords: fringe analysis Reference EPFL-ARTICLE-176959doi:10.1016/j.optlaseng.2012.04.006View record in Web of Science URL: http://www.sciencedirect.com/science/article/pii/S0143816612001182
Journal ArticleDOI
Nanoscale topography and spatial light modulator characterization using wide-field quantitative phase imaging
Gannavarpu Rajshekhar,Basanta Bhaduri,Chris Edwards,Renjie Zhou,Lynford L. Goddard,Gabriel Popescu +5 more
TL;DR: The inherent stability of the common-path interferometric design allows reliable measurement of the temporally varying phase retardation of the liquid crystal cells, and thus enables real-time characterization of spatial light modulators.
Journal ArticleDOI
Phase correlation imaging of unlabeled cell dynamics.
Lihong Ma,Gannavarpu Rajshekhar,Gannavarpu Rajshekhar,Ru Wang,Basanta Bhaduri,Basanta Bhaduri,Shamira Sridharan,Mustafa Mir,Arindam Chakraborty,Rajashekar Iyer,Supriya G. Prasanth,Larry J. Millet,Larry J. Millet,Martha U. Gillette,Gabriel Popescu +14 more
TL;DR: It is shown that phase correlation imaging can extract quantitatively the diffusion coefficient map associated with live cells, as well as standard Brownian particles, and found that PCI can distinguish between senescent and quiescent cells, which is extremely difficult without using specific markers currently.
Journal ArticleDOI
Strain estimation in digital holographic interferometry using piecewise polynomial phase approximation based method.
TL;DR: The paper proposes an elegant method for direct measurement of unwrapped phase derivative that relies on approximating the interference phase as a piecewise cubic polynomial and subsequently evaluating thePolynomial coefficients using cubic phase function algorithm.
Journal ArticleDOI
Strain, curvature, and twist measurements in digital holographic interferometry using pseudo-Wigner-Ville distribution based method.
TL;DR: A pseudo-Wigner-Ville distribution based method for measurement of strain, curvature, and twist in digital holographic interferometry where the object deformation or displacement is encoded as interference phase is proposed.