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Proceedings Paper

A Small Aperture-Dependent Error In Quantitative Holographic Interferometry
Author(s): J. de Jong
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Paper Abstract

In holographic interferometry, the "phase difference" governing the interference pattern appears to deviate slightly from the value that follows from the usual formula. This phase deviation δ is due to the nonvanishing detector aperture and can be calculated for double exposure holography in the case that the detector is focussed on the object surface. In practical situations delta; appears to be maximized by a function proportional to the longitudinal displacement and to the square of the angular detector aperture, moreover 1S1{ ff. Neglection of δ can cause relative errors in the calculated displacements in the order of per mills, while in large aperture observation systems the error may increase to several per cents. The maximal absolute error, however, is always smaller than a quarter of the wavelength.

Paper Details

Date Published: 13 December 1983
PDF: 11 pages
Proc. SPIE 0370, Holographic Data Nondestructive Testing, (13 December 1983); doi: 10.1117/12.934902
Show Author Affiliations
J. de Jong, Delft University of Technology (The Netherlands)

Published in SPIE Proceedings Vol. 0370:
Holographic Data Nondestructive Testing
Dalibor Vukicevic, Editor(s)

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