1 April 1994 Low-spatial-frequency steep grating for use in moiré interferometry
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Optical Engineering, 33(4), (1994). doi:10.1117/12.166937
Abstract
The theoretical background and the procedure for executing a new moiré interferometry method, which combines the advantages of geometric and traditional moiré interferometry, are reported. The method uses a low-spatial-frequency steep grating of about 40 lines/mm on a mirror-finished specimen surface to achieve high-contrast moiré fringes. A special four-beam moiré interferometry bench is designed for the low-grating frequency used. An application to experimental fracture mechanics analysis is briefly discussed.
F. X. Wang, Greg B. May, Albert S. Kobayashi, "Low-spatial-frequency steep grating for use in moiré interferometry," Optical Engineering 33(4), (1 April 1994). http://dx.doi.org/10.1117/12.166937
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KEYWORDS
Diffraction gratings

Deflectometry

Diffraction

Moire patterns

Wavefronts

Fringe analysis

Spatial frequencies

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