Prof. Bosanta Ranjan Boruah Profile

Prof. Bosanta Ranjan Boruah

Professor at Indian Institute of Technology Guwahati

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Author

Publications (26)

Proceedings Article | 16 May 2023 Poster + Paper

Estimation of 3D point spread function of a widefield microscope by stochastic least square minimization method

S. S. Goutam Buddha, Nagendra Kumar, Santanu Konwar, Bosanta Boruah

Proceedings Volume 12385, 123850C (2023) https://doi.org/10.1117/12.2651025

KEYWORDS: Point spread functions, Microscopes, Image resolution, Imaging systems, Error analysis, 3D acquisition, Stochastic processes, 3D image processing, Image deconvolution, Biological imaging

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Proceedings Article | 16 March 2023 Poster + Paper

Orthogonality of Zernike modes in phase profiles estimated using Zonal wavefront sensor and transport of intensity phase retrieval method

Akanshu Chauhan, Nedup Sherpa, Nagendra Kumar, Pranjal Choudhury, S. S. Goutam Buddha, Bosanta Boruah

Proceedings Volume 12389, 123890I (2023) https://doi.org/10.1117/12.2648666

KEYWORDS: Wavefronts, Wavefront sensors, Phase reconstruction, Phase retrieval, Zernike polynomials, Wavefront aberrations, Adaptive optics, Wavefront reconstruction, Free space optics, Lens arrays

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Proceedings Article | 8 March 2023 Poster + Paper

Improvement in wavefront measurement accuracy in grating array-based zonal wavefront sensors by modulating the intensity profile of the incident beam

Nagendra Kumar, Pranjal Choudhury, Nedup Sherpa, Akanshu Chauhan, S. S. Goutam Buddha, Karuna Malik, Santanu Konwar, Bosanta Boruah

Proceedings Volume 12445, 124450T (2023) https://doi.org/10.1117/12.2648670

KEYWORDS: Wavefronts, Holograms, Diffraction gratings, Wavefront sensors, Detector arrays, Binary data, Diffraction, Modulation, Light sources and illumination, Signal intensity

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Proceedings Article | 2 March 2020 Paper

An ex-situ surface profile measurement scheme using a zonal wavefront sensor with simultaneous presence of reference and test wavefronts

Nagendra Kumar, Alika Khare, Bosanta R. Boruah

Proceedings Volume 11287, 1128719 (2020) https://doi.org/10.1117/12.2542102

KEYWORDS: Wavefronts, Wavefront sensors, Thin films, Wave plates, Beam splitters, Holograms, Mirrors, Sensors, Detector arrays

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Proceedings Article | 2 March 2020 Presentation + Paper

Enhanced dynamic range of the grating array based zonal wavefront sensor using a zone wise scanning method

Nagendra Kumar, Alika Khare, Bosanta Boruah

Proceedings Volume 11287, 112870E (2020) https://doi.org/10.1117/12.2542084

KEYWORDS: Wavefronts, Wavefront sensors, Sensors, Holograms, Holography, Microlens array, Cameras, Liquid crystals, Numerical simulations

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Proceedings Article | 24 February 2020 Presentation + Paper

Calculation of spot diagrams of different vector beams using geometrical ray tracing

Karuna Sindhu Malik, Bosanta Boruah

Proceedings Volume 11297, 1129706 (2020) https://doi.org/10.1117/12.2542151

KEYWORDS: Ray tracing, Polarization, Point spread functions, Imaging systems, Geometrical optics, Diffraction, Physics, Refraction, Superposition, Beam propagation method

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Proceedings Article | 24 February 2020 Paper

Estimation of maximum translation speed of a trapped particle in holographic optical tweezers

Karuna Sindhu Malik, S. S. Goutam Buddha, Ranjan Kalita, Bosanta Boruah

Proceedings Volume 11297, 112970Z (2020) https://doi.org/10.1117/12.2542144

KEYWORDS: Particles, Holograms, Holography, Optical tweezers, Binary data, Silica, Computer generated holography, Objectives, Cameras, Microscopes

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Proceedings Article | 18 September 2018 Presentation + Paper

An analytical study on the presence of inter-modal cross-talk in a modal wavefront sensor

Santanu Konwar, Bosanta Boruah

Proceedings Volume 10772, 107720A (2018) https://doi.org/10.1117/12.2320229

KEYWORDS: Sensors, Wavefront sensors, Holograms, Wavefronts, Computer generated holography, Diffraction, Holography

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Proceedings Article | 18 September 2018 Presentation + Paper

Improvement in modal wavefront sensing in terms of cross-talk reduction and linearity

Santanu Konwar, Bosanta Boruah

Proceedings Volume 10772, 107720D (2018) https://doi.org/10.1117/12.2319928

KEYWORDS: Sensors, Wavefront sensors, Holograms, Wavefronts, Zernike polynomials, Diffraction, Computer generated holography

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Proceedings Article | 18 September 2018 Presentation + Paper

Laser scanning confocal microscopy using illumination beams with different polarizations in quick succession

Ranjan Kalita, S. S. Goutam Buddha, Bosanta Boruah

Proceedings Volume 10772, 107720I (2018) https://doi.org/10.1117/12.2320176

KEYWORDS: Polarization, Holograms, Microscopes, Confocal microscopy, Laser scanners, Image processing

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Proceedings Article | 18 September 2018 Paper

Effect of aberration on the electric field orientation around the focus of a polarized light beam

Ranjan Kalita, Bosanta Boruah

Proceedings Volume 10772, 107720Y (2018) https://doi.org/10.1117/12.2320177

KEYWORDS: Point spread functions, Polarization, Monochromatic aberrations, Molecules, Diffraction, Fourier transforms, Numerical simulations, Optical aberrations, Absorption

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Proceedings Article | 23 February 2018 Paper

Suitability of holographic beam scanning in high resolution applications

Ranjan Kalita, S. S. Goutam Buddha, Bosanta Boruah

Proceedings Volume 10499, 104991P (2018) https://doi.org/10.1117/12.2287804

KEYWORDS: Computer generated holography, Holograms, Scanners, Sensors, Signal detection, Mirrors, Confocal microscopy, Binary data, Beam splitters, Imaging systems

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Proceedings Article | 23 February 2018 Paper

Estimation of point spread function of an imaging system using a programmable target

S. S. Goutam Buddha, Ranjan Kalita, Bosanta Boruah

Proceedings Volume 10499, 104991O (2018) https://doi.org/10.1117/12.2287786

KEYWORDS: Point spread functions, Imaging systems, Confocal microscopy, Image resolution, Microscopes, Spatial light modulators, Diffraction, Monochromatic aberrations, Modulators, Convolution

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Proceedings Article | 18 March 2016 Paper

Binary hologram based high speed zonal wavefront sensing with reduced estimation time

Biswajit Pathak, Bosanta Boruah

Proceedings Volume 9741, 97410T (2016) https://doi.org/10.1117/12.2213986

KEYWORDS: Wavefronts, Sensors, Detector arrays, Diffraction gratings, Holograms, Adaptive optics, Temporal resolution, Computer generated holography, Transmittance, Staring arrays, Spatial frequencies

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Proceedings Article | 15 March 2016 Paper

Investigation of algorithm discretization error in a zonal wavefront estimation process

Biswajit Pathak, Bosanta Boruah

Proceedings Volume 9739, 973916 (2016) https://doi.org/10.1117/12.2213966

KEYWORDS: Discretization errors, Wavefronts, Error analysis, Wavefront sensors, Atmospheric modeling, Atmospheric propagation, Sensors, Optical aberrations, Adaptive optics, Phase imaging, Algorithm development, Reconstruction algorithms, Charge-coupled devices

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Proceedings Article | 9 March 2016 Presentation + Paper

Confocal imaging with orthogonally polarized illumination beams

Ranjan Kalita, Bosanta Boruah

Proceedings Volume 9713, 971316 (2016) https://doi.org/10.1117/12.2212159

KEYWORDS: Confocal microscopy, Polarization, Computer generated holography, Molecules, Microscopes, Ferroelectric LCDs, Holograms, Beam splitters, Cameras, RGB color model, Wavefronts, Mirrors, Prisms

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Proceedings Article | 7 March 2016 Paper

Observation of thermally induced movement of a beam deflected by a liquid crystal spatial light modulator

Santanu Konwar, Bosanta Boruah

Proceedings Volume 9769, 976915 (2016) https://doi.org/10.1117/12.2213109

KEYWORDS: Liquid crystals, Thermal effects, Adaptive optics, Optical microscopy, Optical tweezers, LCDs, Computer generated holography, Diffraction, Holograms, Molecules, Spatial light modulators, Binary data, Wavefronts

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Proceedings Article | 15 June 2015 Paper

Reduction in the amount of crosstalk with reduced number of focal spot rows in a grating array based zonal wavefront sensor

Biswajit Pathak, Bosanta Boruah

Proceedings Volume 9654, 965414 (2015) https://doi.org/10.1117/12.2181713

KEYWORDS: Wavefronts, Sensors, Wavefront sensors, Spatial frequencies, Binary data, Fourier transforms, Adaptive optics, Holograms, Wavefront aberrations, Visual optics

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Proceedings Article | 6 November 2014 Paper

Aberration resilience of azimuthally polarized beam with a helical phase mask

B. Boruah, Md. Gaffar

Proceedings Volume 9272, 92721H (2014) https://doi.org/10.1117/12.2072088

KEYWORDS: Monochromatic aberrations, Photomasks, Wavefronts, Polarization, Beam propagation method, Mendelevium, Fourier transforms, Physics, Lithography, Optical storage

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Proceedings Article | 6 November 2014 Paper

Analysis of error propagation in an improved zonal phase-gradient model

Biswajit Pathak, Bosanta Boruah

Proceedings Volume 9272, 92721Y (2014) https://doi.org/10.1117/12.2072302

KEYWORDS: Wavefronts, Wave propagation, Error analysis, Wavefront sensors, Sensors, Reconstruction algorithms, Wavefront reconstruction, CCD image sensors, Charge-coupled devices, Visual optics

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Proceedings Article | 5 November 2014 Paper

Effect of higher order aberrations on a radially polarized beam

Md. Gaffar, B. Boruah

Proceedings Volume 9272, 92720J (2014) https://doi.org/10.1117/12.2072057

KEYWORDS: Monochromatic aberrations, Polarization, Fourier transforms, Mendelevium, Diffraction, Numerical simulations, Physics, Electron beam lithography, Lithography, Super resolution

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Proceedings Article | 17 June 2013 Paper

Dynamic control of illumination beam phase profile in a scanning optical microscope

Abhijit Das, Bosanta Boruah

Proceedings Volume 8797, 87970K (2013) https://doi.org/10.1117/12.2032672

KEYWORDS: Holograms, Wavefronts, Binary data, Microscopes, Wavefront sensors, Optical microscopes, Cameras, Sensors, Liquid crystals, Adaptive optics

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Proceedings Article | 26 November 2012 Paper

High-speed zonal wavefront sensing

Biswajit Pathak, Abhijit Das, Bosanta Boruah

Proceedings Volume 8557, 85570A (2012) https://doi.org/10.1117/12.999893

KEYWORDS: Wavefront sensors, Wavefronts, Binary data, Cameras, Holograms, Sensors, Lenses, Monochromatic aberrations, Digital cameras, Spatial frequencies

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Proceedings Article | 25 February 2010 Paper

Confocal microscope with enhanced lateral resolution using engineered illumination pupil

B. Boruah

Proceedings Volume 7570, 75700N (2010) https://doi.org/10.1117/12.841120

KEYWORDS: Confocal microscopy, Microscopes, Point spread functions, Resolution enhancement technologies, Illumination engineering, Spatial frequencies, Luminescence, Image resolution, Modulation transfer functions, Image enhancement

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Proceedings Article | 12 February 2010 Paper

Zonal wavefront sensing using a liquid crystal spatial light modulator

B. Boruah

Proceedings Volume 7619, 76190G (2010) https://doi.org/10.1117/12.841508

KEYWORDS: Wavefronts, Diffraction gratings, Wavefront sensors, Sensors, Diffraction, Holograms, Liquid crystals, Spatial resolution, Detector arrays, LabVIEW

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Proceedings Article | 14 February 2007 Paper

Programmable diffractive optics for laser scanning confocal microscopy

B. Boruah, M. Neil

Proceedings Volume 6443, 644310 (2007) https://doi.org/10.1117/12.700611

KEYWORDS: Confocal microscopy, Polarization, Point spread functions, Mirrors, Microscopes, Beam splitters, Scanners, Laser scanners, Prisms, Off axis mirrors

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Showing 5 of 26 publications

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