Dr. Vishesh Kumar Dubey Profile

Dr. Vishesh Kumar Dubey

at UiT The Arctic Univ of Norway

SPIE Involvement:

Author

Publications (17)

Proceedings Article | 18 June 2024 Poster + Paper

Common-path off-axis differential interference contrast microscope for monitoring cell dynamics

Anuj Saxena, Azeem Ahmad, Vishesh Dubey, Hong Mao, Anand Kumar, Anowarul Habib, Satish Kumar Dubey, Balpreet Singh Ahluwalia, Dalip Singh Mehta

Proceedings Volume 12996, 129960T (2024) https://doi.org/10.1117/12.3017023

KEYWORDS: Digital image correlation, Microscopes, Red blood cells, Interferograms, Bacteria, Polarizers, Polarization, Biological samples, Biological imaging, Vacuum chambers

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Proceedings Article | 9 August 2023 Paper

Highly temporal phase stable common-path quantitative phase microscope

Anuj Saxena, Azeem Ahmad, Vishesh Dubey, Sathi Das, Anowarul Habib, Balpreet Singh Ahluwalia, Dalip Singh Mehta

Proceedings Volume 12630, 126300P (2023) https://doi.org/10.1117/12.2671032

KEYWORDS: Red blood cells, Microscopes, Interferograms, Phase measurement, Refractive index, Polystyrene, Polarizers, Microscopy, Tunable filters, Polarized light

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Proceedings Article | 17 March 2023 Poster + Paper

Effect of partial spatial coherence of light on quantitative phase microscopy of biological samples: improved spatial phase sensitivity, space-bandwidth product, and high accuracy in phase measurement

Dalip Singh Mehta, Shilpa Tayal, Azeem Ahmad, Sunil Bhatt, Vishesh Kumar Dubey, Ankit Butola, Balpreet Singh Ahluwalia

Proceedings Volume 12389, 123890L (2023) https://doi.org/10.1117/12.2651080

KEYWORDS: Light sources, Interferograms, Speckle, Single mode fibers, Phase measurement, Partial coherence, Microscopy, Physical coherence, Image resolution, Biological samples

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Proceedings Article | 17 March 2023 Poster + Paper

Rapid identification of antimicrobial drug resistance strains of E-coli using SERS nanowire chip

Sathi Das, Kanchan Saxena, Abdolrahman Khezri, Vishesh Dubey, Azeem Ahmad, Jean-Claude Tinguely, Dalip Singh Mehta, Rafi Ahmad, Balpreet Singh Ahluwalia

Proceedings Volume 12396, 123960C (2023) https://doi.org/10.1117/12.2650578

KEYWORDS: Raman spectroscopy, Surface enhanced Raman spectroscopy, Nanowires, Silicon, Bacteria, Proteins, Silver, Pathogens, Vibration, Semiconducting wafers

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Proceedings Article | 16 March 2023 Presentation

Quantitative phase microscopy for life science and diagnosis (Conference Presentation)

Balpreet Singh Ahluwalia, Azeem Ahmad, Vishesh Kumar Dubey, Ankit Butola

Proceedings Volume PC12389, PC123890G (2023) https://doi.org/10.1117/12.2659335

KEYWORDS: Microscopy, Life sciences, Objectives, Temporal coherence, Speckle, Optical microscopy, Ocean optics, Molecules, Luminescence, Liver

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Proceedings Article | 6 March 2023 Presentation

Photonic-chip based multimodal optical imaging of formalin-fixed paraffin-embedded tissue sections (Conference Presentation)

Vishesh Kumar Dubey, Azeem Ahmad, Luis Villegas, Hong Mao, Mona Nystad, Ganesh Acharya, Balpreet Singh Ahluwalia

Proceedings Volume 12371, 1237103 (2023) https://doi.org/10.1117/12.2649860

KEYWORDS: Tissue optics, Tissues, Optical imaging, Microscopy, Waveguides, Organisms, Super resolution, Image resolution, Reconstruction algorithms, Phase shifting

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SPIE Journal Paper | 11 November 2020 Open Access

Highly temporal stable, wavelength-independent, and scalable field-of-view common-path quantitative phase microscope

Azeem Ahmad, Vishesh Dubey, Ankit Butola, Balpreet Singh Ahluwalia, Dalip Singh Mehta

JBO, Vol. 25, Issue 11, 116501, (November 2020) https://doi.org/10.1117/12.10.1117/1.JBO.25.11.116501

KEYWORDS: Glasses, Optical spheres, Phase measurement, Objectives, Microscopes, Image resolution, Interferometry, Cameras, Diffraction gratings, Refractive index

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Proceedings Article | 21 February 2020 Presentation + Paper

Field-portable multi-modal chip-based fluorescence, bright field and quantitative phase microscopy using smartphone detecting system

Dalip Singh Mehta, Shilpa Tayal, Anuj Saxena, Veena Singh, Vishesh Kumar Dubey

Proceedings Volume 11230, 112300A (2020) https://doi.org/10.1117/12.2546258

KEYWORDS: Phase imaging, Biomedical optics and medical imaging, Microscopy, Interferometers, Microscopes, Waveguides, Tissues, Light emitting diodes, Objectives, Breast

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Proceedings Article | 20 February 2020 Presentation + Paper

Speckle-free quantitative phase microscopy using pseudo-thermal light source for label-free imaging of biological cells and tissues with high temporal phase stability and spatial phase sensitivity

Dalip Singh Mehta, Veena Singh, Shilpa Tayal, Sunil Bhatt, Vishesh Kumar Dubey

Proceedings Volume 11251, 112511V (2020) https://doi.org/10.1117/12.2543982

KEYWORDS: Light sources, Interferometers, Microscopy, Shearing interferometers, Objectives, Speckle, Diffusers, Tissues, Light scattering, Interferometry

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Proceedings Article | 23 February 2018 Presentation + Paper

Longitudinal spatial coherence gated high-resolution tomography and quantitative phase microscopy of biological cells and tissues with uniform illumination

Dalip Singh Mehta, Azeem Ahmad, Vishesh Dubey, Veena Singh, Ankit Butola, Tonmoy Mohanty, Sreyankar Nandi

Proceedings Volume 10503, 1050305 (2018) https://doi.org/10.1117/12.2290334

KEYWORDS: Spatial coherence, Light sources, Speckle, Tomography, Optical coherence tomography, Objectives, Temporal coherence, Speckle pattern, Microscopy, Diffusers

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Proceedings Article | 28 July 2017 Paper

Polarization interferometric digital holographic microscope for quantitative phase imaging and coherent noise reduction

Veena Singh, Gyanendra Singh, Azeem Ahmad, Vishesh Dubey, Ankit Butola, Tilak Joshi, Dalip Singh Mehta

Proceedings Volume 10414, 104140V (2017) https://doi.org/10.1117/12.2291654

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Proceedings Article | 28 July 2017 Paper

Quantitative phase imaging using spectrally resolved white light interferometry

Ankit Butola, Azeem Ahmad, Vishesh Dubey, Veena Singh, Tilak Joshi, P. Senthilkumaran, Dalip Singh Mehta

Proceedings Volume 10414, 104140G (2017) https://doi.org/10.1117/12.2288530

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Proceedings Article | 28 July 2017 Paper

Quantitative phase imaging using white light interference microscopy with color fringe analysis: A comparative study of color interferograms recorded by single chip and 3-chip CCD color camera

Vishesh Dubey, Azeem Ahmad, Veena Singh, Ankit Butola, Dalip Singh Mehta

Proceedings Volume 10414, 104140I (2017) https://doi.org/10.1117/12.2287993

KEYWORDS: CCD cameras, Phase imaging, Microscopy, Fringe analysis, Cameras, Phase shifting

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Proceedings Article | 28 July 2017 Paper

Reduction of spatial phase noise in the laser based digital holographic microscopy for the quantitative phase measurement of biological cells

Azeem Ahmad, Vishesh Dubey, Veena Singh, Ankit Butola, Tilak Joshi, Dalip Singh Mehta

Proceedings Volume 10414, 104140H (2017) https://doi.org/10.1117/12.2287908

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Proceedings Article | 9 March 2016 Presentation + Paper

Quantitative phase imaging of biological cells and tissues using singleshot white light interference microscopy and phase subtraction method for extended range of measurement

Dalip Singh Mehta, Anuradha Sharma, Vishesh Dubey, Veena Singh, Azeem Ahmad

Proceedings Volume 9718, 971828 (2016) https://doi.org/10.1117/12.2212453

KEYWORDS: Phase imaging, Interferometry, Refractive index, Tissues, Microscopes, CCD cameras, Blood, Objectives, Microscopy, Phase interferometry

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Proceedings Article | 9 March 2016 Presentation + Paper

A novel phase shifting structured illumination microscopy

Veena Singh, Vishesh Dubey, Azeem Ahmad, Gyanendra Singh, D. S. Mehta

Proceedings Volume 9713, 97131K (2016) https://doi.org/10.1117/12.2212456

KEYWORDS: Phase shifting, Light emitting diodes, Phase shifts, Ronchi rulings, Microscopy, Beam splitters, Switching, Reconstruction algorithms, Phase imaging, Objectives, Fringe analysis, Calibration, Mirrors, CCD cameras

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Proceedings Article | 9 March 2016 Paper

White light phase shifting interferometry and color fringe analysis for the detection of contaminants in water

Vishesh Dubey, Veena Singh, Azeem Ahmad, Gyanendra Singh, Dalip Singh Mehta

Proceedings Volume 9718, 97181F (2016) https://doi.org/10.1117/12.2212405

KEYWORDS: Bacteria, Phase shifts, CCD cameras, Water, Fringe analysis, Objectives, Phase interferometry, Interferometry, Cameras, Ferroelectric materials

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Showing 5 of 17 publications

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