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Optical Engineering

Comparative Holographic Moire Interferometry: Separation Of Moire Fringes From The Carrier Interference Pattern
Author(s): V. Sainov; E. Simova
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Paper Abstract

Comparative holographic moire interferometry (CHMI) permits defect detection by comparison of the mechanical responses of two macroscopically identical specimens at equal loading. In the present work a technique of moire fringe separation is suggested that is amenable to automatic readout. Two approaches are proposed and experimentally verified: phase shifting of the carrier interference pattern and auxiliary carrier fringe generation with subse-quent optical filtering. The phase shifting method is applicable to an additive moire scheme with two reference beams. Auxiliary carrier fringe generation can be used in both additive and multiplicative CHMI. The frequency constraints of the latter method due to the optical recording arrangement and mechanical responses of the tested specimen are analyzed.

Paper Details

Date Published: 1 May 1989
PDF: 6 pages
Opt. Eng. 28(5) doi: 10.1117/12.7976997
Published in: Optical Engineering Volume 28, Issue 5
Show Author Affiliations
V. Sainov, Bulgarian Academy of Sciences (Bulgaria)
E. Simova, Bulgarian Academy of Sciences (Bulgaria)


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