Phase-shifting hand-held diffraction moire interferometer

Vance A. Deason; Michael B. Ward

doi:10.1117/12.57423

1 December 1991 Phase-shifting hand-held diffraction moiré interferometer

Vance A. Deason, Michael B. Ward

Proceedings Volume 1554, Second International Conference on Photomechanics and Speckle Metrology; (1991) https://doi.org/10.1117/12.57423
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

Diffraction moiré interferometry is widely used in the study of material deformation and usually is implemented by building an apparatus for each experiment. This new device is the latest in a series of diffraction moiré interferometers developed at the INEL to simplify the process of acquiring diffraction moiré data. The unit is hand held, weighs about one kilogram, and is designed to be placed in intimate contact with the specimen and diffraction grating.

A series of phase shifted interferograms is automatically acquired and processed to produce quantitative data on deformation. This paper describes the design details and provides examples of typical applications and data.

Citation Download Citation

Vance A. Deason and Michael B. Ward "Phase-shifting hand-held diffraction moiré interferometer", Proc. SPIE 1554, Second International Conference on Photomechanics and Speckle Metrology, (1 December 1991); https://doi.org/10.1117/12.57423

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