Abstract

Measurement of displacements and strains is performed by extracting with a new scanning method the information from a double-exposure hologram. A real image is formed by a conjugate reference beam that illuminates a small part of the plate defining an observation direction for each point of the object under test. Sweeping the beam across the plate, which corresponds to a variation of the viewing direction, produces a movement of the fringes on the surface of the observed object. The fringes are counted during each scanning by a detector placed at the observed point. A minimum of three scannings provides all the information required to determine the three-dimensional displacement of the point itself.

© 1974 Optical Society of America

Measurement of Three-Dimensional Displacements by Hologram Interferometry

K. Shibayama and H. Uchiyama
Appl. Opt. 10(9) 2150-2154 (1971)

Sandwich Hologram Interferometry: a New Dimension in Holographic Comparison

Nils Abramson
Appl. Opt. 13(9) 2019-2025 (1974)

Three-dimensional displacement measurement by a holospeckle interferometry method

W. Z. L. Zhuang, J. P. Baird, H. M. Williamson, and R. K. Clark
Appl. Opt. 32(25) 4728-4737 (1993)

Analysis of a system for hologram interferometry with a continuously scanning reconstruction beam

Leif Ek and Klaus Biedermann
Appl. Opt. 16(9) 2535-2542 (1977)

Measuring Accuracy of Three-Dimensional Displacements in Holographic Interferometry

T. Matsumoto, K. Iwata, and R. Nagata
Appl. Opt. 12(5) 961-967 (1973)