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Proceedings Paper

A flexible image fiber probe based speckle imaging for extraction of surface features with possible application in intra-cavity inspection
Author(s): Guru Prasad A. S.; Murukeshan V. Matham; Kelvin H. K. Chan
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Paper Abstract

Non-destructive inspection and non-invasive interrogation of surface features has always been a subject of discussion owing to the rapid advances in engineering and medical fields. Measurement of surface features which are miniature in size, inaccessible and of complex shape, has always posed challenges to conventional types of imaging and metrological systems. This paper, presents a methodology and a miniature image fiber probe configuration based on speckle technology for imaging such surface features, with possible application in intra cavity inspection. In the present work, a metal pipe is used as a test sample representing an engineering cavity. The acquired images of the intra cavity were subjected to image processing for contouring and size estimation. An analysis on the variation in the average speckle intensity, when the speckle image passes through an image fiber, is also carried out in this work. The obtained results indicate that the proposed probe configuration and related methodology can be used for inspection of cavity features and profiles of diffusive surfaces.

Paper Details

Date Published: 17 July 2015
PDF: 7 pages
Proc. SPIE 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015), 95242Q (17 July 2015); doi: 10.1117/12.2190498
Show Author Affiliations
Guru Prasad A. S., Nanyang Technological Univ. (Singapore)
Murukeshan V. Matham, Nanyang Technological Univ. (Singapore)
Kelvin H. K. Chan, Nanyang Technological Univ. (Singapore)
Rolls-Royce Singapore Pte Ltd. (Singapore)


Published in SPIE Proceedings Vol. 9524:
International Conference on Optical and Photonic Engineering (icOPEN 2015)
Anand K. Asundi; Yu Fu, Editor(s)

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