Department of Physics

U. Paul Kumar, N. Krishna Mohan, and M.P. Kothiyal,
Characterization of micro-lenses based on single interferogram analysis using Hilbert transformation.
Optics Communication, 284, 5084–5092 (2011).

U. Paul Kumar, U. Somasundaram, M.P. Kothiyal, and N. Krishna Mohan
Microscopic TV Holography and Interferometry for Surface Profiling and Vibration Amplitude Measurement in Microsystems
Defence Science Journal, 61, 491-498 (2011).

U. Paul Kumar, Sudip Pal, U. Somasundaram, M.P. Kothiyal and N. Krishna Mohan
TV Holography for 3-D Surface Shape Measurement
Lasers in Engineering, 21, 231–240 (2011).

U. Paul Kumar, N. Krishna Mohan, and M.P. Kothiyal
Measurement of static and vibrating Microsystems using Microscopic TV holography. Optik 122, 49-54 (2011).

U. Paul Kumar, N. Krishna Mohan, and M.P. Kothiyal
Time Average Vibration Fringe Analysis Using Hilbert Transformation
Applied Optics, 49, 5777 – 5786, (2010).

U. Paul Kumar, U. Somsundaram, M.P. Kothiyal, and N. Krishna Mohan
TV Holography for 2-D Displacement Fringe Analysis
Journal of Instrumentation, 40, 298-301(2010)..

N. Krishna Mohan and P. K. Rastogi
Recent developments in Interferometry for Microsystems Metrology
Optics and Lasers in Engineering, 47 199-202 (2009)

U. Paul Kumar, M. P. Kothiyal and N. Krishna Mohan
Microscopic TV shearography for characterization of microsystems
Optics Letters, 34 1612-1614(2009)

U. Paul Kumar, Y. Kalyani, N. Krishna Mohan and M. P. Kothiyal
Time-average TV Holography for Vibration Fringe Analysis
Applied Optics , 48, 3094-3101 (2009).

U. Paul Kumar, N. Krishna Mohan , M. P. Kothiyal and A. K. Asundi
Deformation and shape measurement using multiple wavelength microscopic TV holography.
Optical Engineering, 48 023601-1-023601-10 (2009).

U. Paul Kumar, N. Krishna Mohan and M.P. Kothiyal
Measurement of discontinuous surfaces using multiple-wavelength interferometry
Optical Engineering, 48 073603-1 - 073603-8 (2009)

U. Paul Kumar, Basanta Bhaduri, M. P. Kothiyal and N. Krishna Mohan
Two-wavelength micro-interferometry for 3-D surface profiling
Optics and Lasers in Engineering, 47 223-229 (2009)

N. Krishna Mohan
Speckle Techniques for Optical Metrology
J. Optics Research , 9 291-340 (2008)

U. Paul Kumar, Basantha Bhaduri, N. Krishna Mohan, M. P. Kothiyal and A. K. Asundi
Microscopic TV holography for MEMS deflection and 3-D surface profile characterization
Optics and Lasers in Engineering, 46 687-694(2008)

U. Paul Kumar, Basanta Bhaduri, M. P. Kothiyal and N. Krishna Mohan
Two-wavelength microinterferometry for 3-D surface profiling
Optics and Lasers in Engineering 47 223-229(2009)

Basanta Bhaduri, N. Krishna Mohan and M. P. Kothiyal
Digital speckle pattern interferometry (DSPI) using spatial phase shifting :influence of intensity and phase gradients
Journal of Modern Optics, 55:6 ,861-876(2008)

Basanta Bhaduri, N. Krihsna Mohan and M. P. Kothiyal
A comparative study of phase shifting algorithms in Digital Speckle Pattern Interferometry
Optik 147-152 (2008)

Basanta Bhaduri, M. P. Kothiyal N. Krishna Mohan
Cuvature measurement using three-aperture digital shearography and fast Fourier transform method
Optics and Lasers in Engineering 45,1001-1004.(2007)

Basanta Bhaduri, N. Krishna Mohan and M. P. Kothiyal
Simultaneous measurement of out-of-plane displacement and slope using
multi-aperture DSPI system and fast Fourier transform
Applied Optics 46, 23, 5680-5686(2007).
This issue carried a photo on its front cover from this paper

Basanta Bhaduri, N. Krishna Mohan and M. P. Kothiyal
(1,N) spatial phase shifting technique in DSPI and DS for NDE
Optical Engineering 46, 5 051009-1-051009-7 (2007)

Basanta Bhaduri, M.P. Kothiyal and N. Krishna Mohan
Digital speckle pattern interferometry (DSPI) with increased sensitivity: Use of spatial phase shifting
Optics Communication 272, 9-14 (2007).
Cited as 14th in Top 25 Hottest Articles in 'Optics Communication' Jan-Mar 2007

Basanta Bhaduri, N. Krishna Mohan, M. P. Kothiyal and R.S. Sirohi
Use of spatial phase shifting technique in digital speckle pattern interferometry (DSPI) and digital shearography (DS)
Optics Express 14, 24 11598-11607 (2006)

N. Krishna Mohan, Quazi.T.Islam and P.K.Rastogi
Recent developments in Holographic Optical Elements (HOEs) - Guest Editorial
Optics Lasers in Engineering 44, 871-880 (2006).

N. Krishna Mohan and Quazi.T.Islam
Design of an off-axis HOE light concentrator to focus light from multiple directions in a plane
Optics Lasers in Engineering 44, 943-953 (2006)

Basanta Bhaduri, N. Krishna Mohan and M.P. Kothiyal
A dual-function ESPI system for the measurement of Out-of-plane displacement and slope
Optics Lasers in Engineering 44 , 637-644 (2006)

Basanta Bhaduri, N. Krishna Mohan and M.P. Kothiyal
A TV holo-shearography system for NDE
Lasers in Engineering 16 ,93-104 (2006).

B. Bhaduri, N Krishna Mohan, and M. P. Kothiyal
Cyclic path digital speckle shear pattern interferometer: Use of polarization phase shifting
Optical Engineering 45, 105604-1-6 (2006)

B. Bhaduri, N Krishna Mohan, and M. P. Kothiyal
(5, N) phase shift algorithm for speckle and speckle shear fringe analysis in NDE
Journal of Holography & Speckle 3 (1), 18-21 (2006)

Basanta Bhaduri, M.P. Kothiyal and N. Krishna Mohan
A comparative study of phase shifting algorithms in Digital Speckle Pattern Interferometry Optik

N. Krishna Mohan
A real time phase reversal read-out system with BaTiO3 crystal as a recording medium for speckle fringe analysis
Operational characteristics and crystal growth of NLO materials III
Proc. SPIE 5912 ,San Diego USA. pp. 63-69 (2005)

N. Krishna Mohan and Rekha Mathews
Photorefractive phase reversal speckle photography for evaluation of in-plane displacement
Lasers in Engineering 15, 91-105 (2005)

N. Krishna Mohan and P.K. Rastogi
Recent developments in digital speckle pattern interferometry - Guest Editorial
Optics Lasers in Engineering 40 , 439-445 (2003)

N. Krishna Mohan and P.K. Rastogi
Phase shift Calibration in Speckle Photography – A First Step to Practical Real Time Analysis of Speckle Correlation Fringes
J. Modern Optics 50 , 183-88 (2003)