Dr. Guru Prasad A. S. Profile

Dr. Guru Prasad A. S.

Advanced Technologist at Nanyang Technological Univ

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Author

Publications (5)

Proceedings Article | 13 June 2017 Paper

Experimental investigations and parametric studies of surface roughness measurements using spectrally correlated speckle images

P. Prabhathan, Chaolong Song, Aswin Haridas, Guru Prasad, Kelvin Chan, Murukeshan V. M.

Proceedings Volume 10449, 1044913 (2017) https://doi.org/10.1117/12.2270539

KEYWORDS: Speckle, Surface roughness, Optical metrology, Laser optics, Laser metrology, Machine vision, Speckle pattern, Error analysis, Calibration, Optical resolution

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Proceedings Article | 13 June 2017 Paper

Intensity and contrast based surface roughness measurement approaches for rough and shiny surfaces

P. Prabhathan, Chaolong Song, Aswin Haridas, Guru Prasad, Kelvin Chan

Proceedings Volume 10449, 1044912 (2017) https://doi.org/10.1117/12.2270535

KEYWORDS: Surface roughness, Optical metrology, Laser metrology, Speckle, Image processing, Metrology, Manufacturing, Surface finishing, Nondestructive evaluation, Optics manufacturing

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Proceedings Article | 13 June 2017 Paper

Surface roughness measurement of additive manufactured samples using angular speckle correlation

Kapil Dev, Guru Prasad A. S., Aswin H, Prabhathan P, Kelvin H. K. Chan, Murukeshan Matham

Proceedings Volume 10449, 104492W (2017) https://doi.org/10.1117/12.2270900

KEYWORDS: Surface roughness, Speckle, Additive manufacturing, Radium, Nondestructive evaluation, Speckle metrology, Speckle pattern, Statistical analysis, Calibration, Inspection

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Proceedings Article | 11 November 2016 Paper

Design and simulation of GRIN objective lenses for an imaging fiber based speckle metrology system

P. Prabhathan, A. S. Guru Prasad, Aswin Haridas, Kelvin H. Chan, V. M. Murukeshan

Proceedings Volume 10150, 1015008 (2016) https://doi.org/10.1117/12.2243778

KEYWORDS: Imaging systems, GRIN lenses, Metrology, Lenses, Speckle metrology, Objectives, Speckle imaging, Distortion, Modulation transfer functions, Speckle

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Proceedings Article | 17 July 2015 Paper

A flexible image fiber probe based speckle imaging for extraction of surface features with possible application in intra-cavity inspection

Guru A. S., Murukeshan Matham, Kelvin Chan

Proceedings Volume 9524, 95242Q (2015) https://doi.org/10.1117/12.2190498

KEYWORDS: Speckle, Inspection, Surface roughness, Image processing, Speckle pattern, Metrology, Speckle imaging, Feature extraction, Nondestructive evaluation, Optical engineering

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