Dr. Alok K. Gupta Profile

Dr. Alok K. Gupta

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Author

Publications (5)

SPIE Journal Paper | 12 October 2024

Quantitative analysis of phase retrieval with the transport of intensity equation under low-light conditions

Ram Kumar, Alok Gupta, Naveen Nishchal

OE, Vol. 63, Issue 11, 111813, (October 2024) https://doi.org/10.1117/12.10.1117/1.OE.63.11.111813

KEYWORDS: Photons, Phase retrieval, Image quality, Phase imaging, Quantitative analysis, Optical engineering, Image retrieval, Imaging systems, Biological imaging, Cameras

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Proceedings Article | 13 March 2024 Presentation

Optimizing macular pigments imaging in humans with visible light optical coherence tomography (OCT) and superluminescent diodes (SLD)

Alok Gupta, Ruoyu Meng, Vivek Srinivasan

Proceedings Volume PC12824, PC128240D (2024) https://doi.org/10.1117/12.3005723

KEYWORDS: Pigments, Optical coherence tomography, Visible radiation, Superluminescent diodes, Visualization, Signal to noise ratio, Safety, Retina, Pathology, Light absorption

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Proceedings Article | 17 March 2023 Presentation

Localizing and quantifying macular pigments in humans with visible light optical coherence tomography (OCT)

Alok Gupta, Ruoyu Meng, Vivek Srinivasan

Proceedings Volume PC12360, PC123600Y (2023) https://doi.org/10.1117/12.2650759

KEYWORDS: Optical coherence tomography, Visible radiation, Reflectivity, Superluminescent diodes, Retina, Macula, Eye, Absorbance

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Proceedings Article | 9 March 2023 Presentation

Visible light optical coherence tomography (OCT) of the human retina with superluminescent diodes (SLDs)

Ruoyu Meng, Alok Gupta, Vivek Srinivasan

Proceedings Volume PC12367, PC123670A (2023) https://doi.org/10.1117/12.2652963

KEYWORDS: Optical coherence tomography, Visible radiation, Superluminescent diodes, Retina, Signal to noise ratio, Chromophores, Supercontinuum sources, Near infrared, Supercontinuum generation, Motion measurement

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Proceedings Article | 9 October 2021 Presentation + Paper

Transport of intensity equation for low-light quantitative phase imaging and security applications

Alok Gupta, Naveen Nishchal

Proceedings Volume 11898, 118980W (2021) https://doi.org/10.1117/12.2601102

KEYWORDS: Digital holography, Phase imaging, Light emitting diodes, Refractive index, Polarization, Phase retrieval, Image encryption, Information security

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