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Proceedings Paper

Compensation techniques in speckle interferometry
Author(s): Rajpal S. Sirohi; Baij Nath Gupta
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Paper Abstract

Anomalies in fringes pattern due to weak defect remain practically hidden when the object is subjected to load in between exposures. Increased load results in more number of fringes. In order to bring out the defective region vividly some procedure to reduce the number of undesired fringes should be adopted. Comparative speckle interferometry compares the response of the test object with that of the master object and the fringe pattern corresponds to the defect when the objects are identically loaded. Surface contours can also be compared. Use of phase shifting in comparative speckle interferometry would give the quantitative estimate of the residual difference.

Paper Details

Date Published: 7 March 2006
PDF: 6 pages
Proc. SPIE 4101, Laser Interferometry X: Techniques and Analysis, (7 March 2006);
Show Author Affiliations
Rajpal S. Sirohi, Indian Institute of Technology/Madras (India)
Baij Nath Gupta, Netaji Subhas Institute of Technology (India)

Published in SPIE Proceedings Vol. 4101:
Laser Interferometry X: Techniques and Analysis
Gordon M. Brown; Malgorzata Kujawinska; Werner P. O. Jueptner; Ryszard J. Pryputniewicz; Ryszard J. Pryputniewicz; Mitsuo Takeda, Editor(s)

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