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Proceedings Paper

Improvement Of The Signal/Noise Ratio In The Method Of Subtraction Of Images By Speckle Interferometry
Author(s): S. Debrus; V. Sokolov
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Paper Abstract

The use of birefringent systems permits the recording, in a single exposure, of several different granularity figures. In two exposures, one with the image A, the other with the image B, we can obtain, in the focal plane of the recording plate of A and B exactly superposed, the profile of the interference fringes which would be given in fact by three exposures, made by alternating the images (A, B, A), with the respective exposure times 1/2, 1, 1/2. The signal/noise ratio is thus ten times greater than that which is given in the case of two poses in the absence of birefringent crystal.

Paper Details

Date Published: 18 April 1978
PDF: 8 pages
Proc. SPIE 0136, 1st European Conf on Optics Applied to Metrology, (18 April 1978); doi: 10.1117/12.956166
Show Author Affiliations
S. Debrus, Curie University (France)
V. Sokolov, Curie University (France)


Published in SPIE Proceedings Vol. 0136:
1st European Conf on Optics Applied to Metrology
Michel H. Grosmann; Patrick Meyrueis, Editor(s)

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