Prof. Dinesh Narayana Naik Profile

Prof. Dinesh Narayana Naik

Associate Professor at Indian Institute of Space Science and Technology

SPIE Involvement:

Author | Student Chapter Advisor

Publications (18)

Proceedings Article | 17 April 2024 Poster

Introducing phase variations in spatial coherence using dynamics of spatially incoherent source

Haneen V. N., Dinesh Naik

Proceedings Volume 13108, 1310811 (2024) https://doi.org/10.1117/12.3030686

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Proceedings Article | 12 May 2023 Paper

Sensitivity enhancement in low coherence Fourier transform spectral interferometry

Athira T. S., Dinesh N. Naik

Proceedings Volume 12638, 126380M (2023) https://doi.org/10.1117/12.2670018

KEYWORDS: Interferometry, Fourier transforms, Beam path, Phase measurement, Interferograms, Phase distribution, Mirrors, Superposition, Phase shifts, Fringe analysis

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Proceedings Article | 15 June 2020 Paper

Correction to spatial mode transformation in a modified interferometer

Yoko Miyamoto, C. T. Samlan, Surya Gautam, Dinesh Naik, Nirmal Viswanathan

Proceedings Volume 11522, 115220A (2020) https://doi.org/10.1117/12.2573768

KEYWORDS: Interferometers, Oscillators, Superposition, Physics, Aerospace engineering, Sagnac interferometers, Optical vortices, Gaussian beams, Stars, Output couplers

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Proceedings Article | 1 April 2020 Presentation + Paper

Velocity estimation from fringe contrast using lensless Fourier transform digital holography

Urvashi Jinwal, Surya Kumar Gautam, Athira S., Pramod Panchal, Dinesh Naik

Proceedings Volume 11352, 113521L (2020) https://doi.org/10.1117/12.2555789

KEYWORDS: Fourier transforms, Holograms, Charge-coupled devices, Holography, 3D image reconstruction, Diffusers, Digital holography, Sagnac interferometers, Optical simulations, Image filtering

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Proceedings Article | 30 March 2020 Presentation + Paper

Extraction of information of an object hidden behind a diffusing layer using dual beam illumination

Arnav Tamrakar, Surya Kumar Gautam, Dinesh Naik

Proceedings Volume 11351, 113511R (2020) https://doi.org/10.1117/12.2555748

KEYWORDS: Diffusers, Data hiding, Speckle pattern, Fringe analysis, Scattering, Imaging systems, Shearography, Holography

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Proceedings Article | 4 September 2018 Paper

Investigation of transverse motion of concealed scatterer using correlation of speckled speckles from static surface layer

Gokul Nair, Vinu R.V., Dinesh Naik, Michael Linde Jakobsen, Steen Hanson, Rakesh Kumar Singh

Proceedings Volume 10750, 107500A (2018) https://doi.org/10.1117/12.2320481

KEYWORDS: Speckle, Diffusers, Light scattering, Speckle pattern, Scattering, Blood circulation, Aerospace engineering, Dynamic light scattering, Skin, Laser scattering

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Proceedings Article | 27 February 2017 Presentation + Paper

Parallel transport of fiber mode structure: orbit-orbit interaction

Pradeep Chakravarthy, Dinesh Naik, Nirmal Viswanathan

Proceedings Volume 10120, 101200F (2017) https://doi.org/10.1117/12.2252060

KEYWORDS: Phase measurement, Fiber optics, Spiral phase plates, Polarization, Superposition, Optical vortices, Poincaré sphere, Wave propagation, Laser beam propagation, Optical fibers, Gaussian beams

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Proceedings Article | 22 June 2013 Paper

Measurement of the shape of objects by two wavelength interferometry

Pavel Pavlíček, Dinesh Naik

Proceedings Volume 8769, 87690H (2013) https://doi.org/10.1117/12.2019001

KEYWORDS: Interferometry, Light sources, Interferometers, Michelson interferometers, Laser interferometry, Mirrors, Cameras, Precision optics, 3D metrology, CCD cameras

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Proceedings Article | 13 May 2013 Paper

Relation between vectorial source structure and coherence-polarization of light

Rakesh Singh, Dinesh Naik, Hitoshi Itou, Maruthi Brundavanam, Yoko Miyamoto, Mitsuo Takeda

Proceedings Volume 8788, 87880O (2013) https://doi.org/10.1117/12.2020842

KEYWORDS: Polarization, Glasses, Beam splitters, Light, Fringe analysis, Chemical elements, Speckle, Interferometers, Calibration, Stochastic processes

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Proceedings Article | 3 May 2013 Paper

Digital holography for recording of incoherent-object hologram as complex spatial coherence function

Dinesh Naik, Giancarlo Pedrini, Wolfgang Osten

Proceedings Volume 8776, 87760B (2013) https://doi.org/10.1117/12.2016833

KEYWORDS: Spatial coherence, Interferometers, Holograms, Holography, Phase shifts, Shearing interferometers, Digital holography, Holographic interferometry, Beam splitters, Phase shifting

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Proceedings Article | 11 October 2012 Paper

Observation of spatial polarization structure near unfolding point of an optical vortex beam using a birefringent Mach-Zehnder interferometer

Maruthi Brundavanam, Yoko Miyamoto, Rakesh Singh, Dinesh Naik, Mitsuo Takeda, Ken'ichi Nakagawa

Proceedings Volume 8480, 848008 (2012) https://doi.org/10.1117/12.930564

KEYWORDS: Polarization, Crystals, Laser crystals, Interferometers, Optical vortices, Mach-Zehnder interferometers, Spiral phase plates, Beam propagation method, Wave plates, Charge-coupled devices

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Proceedings Article | 21 September 2011 Paper

Coherence holography and photon-correlation holography: marriage between holography and statistical optics

Mitsuo Takeda, Wei Wang, Dinesh Naik

Proceedings Volume 8122, 812207 (2011) https://doi.org/10.1117/12.893048

KEYWORDS: Holography, Holograms, Coherence (optics), Fourier transforms, Statistical optics, Speckle, Interferometers, 3D image reconstruction, Glasses, Diffraction

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Proceedings Article | 24 August 2011 Paper

Highly stable interferometric technique for polarization mapping

Dinesh Naik, Rakesh Kumar Singh, Hitoshi Itou, Yoko Miyamoto, Mitsuo Takeda

Proceedings Volume 8173, 817319 (2011) https://doi.org/10.1117/12.899853

KEYWORDS: Polarization, Calibration, Polarimetry, Interferometry, Fringe analysis, Prisms, Sagnac interferometers, Optical spheres, Interferometers, CCD cameras

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Proceedings Article | 27 May 2011 Paper

State of polarization mapping using a calibrated interferometric polarimeter

Dinesh Naik, Rakesh Kumar Singh, Hitoshi Itou, Yoko Miyamoto, Mitsuo Takeda

Proceedings Volume 8082, 80821T (2011) https://doi.org/10.1117/12.888964

KEYWORDS: Polarimetry, Polarization, Calibration, Interferometry, Fourier transforms, Fringe analysis, Sagnac interferometers, Interferometers, Optical components, Optical filters

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We propose a simple scheme for accurate state of polarization (SOP) mapping with an interferometric polarimeter using Fourier transform method of fringe analysis. In single shot polarimeters that use Fourier transform method of fringe analysis, a spatial carrier frequency is introduced in the fringes of recorded interferogram either by introducing the relative tilt between the sample beam under test and a reference beam, as demonstrated by Ohtsuka and Oka or by passing the sample beam through birefringent optical components such as Wollaston prisms as demonstrated by Oka and Kaneko. In this technique, the amount of spatial carrier frequency that enabled to filter different terms in the Fourier spectrum of the recorded interferogram had to be calibrated with the use of light with a known SOP. Even in this case, the spatial carrier frequency introduced in the recorded interferogram is influenced by the relative tilt of the beam used for calibration. To eliminate the linear phase introduced by spatial carrier frequency, usually the spectrum around the carrier frequency location in the Fourier transform is shifted and brought to the centre. During this process an error of a fraction of a pixel in the shifting of the spectrum after filtering to remove the linear phase introduced by spatial carrier frequency will drastically change the measured SOP of light. For accurate SOP mapping, it is important that we eliminate the artifacts and errors due to the spatial carrier frequency in the single shot polarimeter that are otherwise very promising. In the present work, we propose a Mach-Zehnder interferometric polarimeter that uses a common path Sagnac interferometer to generate reference beams with orthogonal state of polarization. By taking advantage of the inherent stability of the proposed common path Sagnac interferometer against surrounding vibrations and air turbulences, a simple calibration scheme using a light of known state of polarization is used to map the state of polarization with better accuracy.

Proceedings Article | 27 May 2011 Paper

Stokes holography for recording and reconstructing objects using polarization fringes

Rakesh Kumar Singh, Dinesh Naik, Hitoshi Itou, Yoko Miyamoto, Mitsuo Takeda

Proceedings Volume 8082, 808208 (2011) https://doi.org/10.1117/12.888963

KEYWORDS: Polarization, Glasses, Holography, Modulation, Electromagnetism, Holograms, Calibration, Scattering, Spherical lenses, Superposition

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Proceedings Article | 3 August 2010 Paper

Three-dimensional coherence holography using a commercial projector for display and incoherent illumination of a coherence hologram

Dinesh Naik, Takahiro Ezawa, Rakesh Singh, Yoko Miyamoto, Mitsuo Takeda

Proceedings Volume 7790, 77900Q (2010) https://doi.org/10.1117/12.858786

KEYWORDS: Holograms, Phase shifts, 3D image reconstruction, Holography, Interferometers, Coherence (optics), Projection systems, Shearing interferometers, Fourier transforms, Holographic interferometry

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Proceedings Article | 2 August 2010 Paper

Vortices in generalized Stokes parameters

Rakesh Singh, Dinesh Naik, Hitoshi Itou, Yoko Miyamoto, Mitsuo Takeda

Proceedings Volume 7782, 778209 (2010) https://doi.org/10.1117/12.859050

KEYWORDS: Polarization, Speckle, Electromagnetism, Sensors, Glasses, Spiral phase plates, Correlation function, Optical networks, Speckle pattern, Fourier transforms

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Proceedings Article | 7 May 2009 Paper

3-D coherence holography using a modified Sagnac radial shearing interferometer with geometric phase shift

Dinesh Naik, Takahiro Ezawa, Yoko Miyamoto, Mitsuo Takeda

Proceedings Volume 7358, 735808 (2009) https://doi.org/10.1117/12.819874

KEYWORDS: Holograms, 3D image reconstruction, Coherence (optics), Holography, Shearing interferometers, Interferometers, Glasses, Beam splitters, Phase shifts, Polarization

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Showing 5 of 18 publications

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