Open Access
A compact portable diffraction moire interferometer
V. A. Deason,M. B. Ward +1 more
- 01 Dec 1989
pp 6-11
37
TL;DR: In this article, a single mode polarization maintaining optical fibers is used to generate the pair of laser beams required by diffraction moire interferometry, which permits extremely rapid and convenient setup for measurement of in-plane displacement distributions on the surfaces of specimens.
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Abstract: This device utilizes single mode polarization maintaining optical fibers to generate the pair of laser beams required by diffraction moire interferometry. Design of the device permits extremely rapid and convenient setup for measurement of in-plane displacement distributions on the surfaces of specimens. The device, applications, and typical data are described.
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Citations
Patent
High-speed 3-D surface measurement surface inspection and reverse-CAD system
John M. Fitts
- 15 Oct 1991
TL;DR: In this article, an apparatus and method for 3D vision sensing or measurement to rapidly collect X-Y-Z surface data to support dimensional measurement, surface inspection and Reverse-CAD functions is described.
178
Patent
Hidden change distribution grating and use in 3D moire measurement sensors and CMM applications
John M. Fitts
- 08 Sep 1992
TL;DR: In this article, a high-speed three-dimensional surface measurement system for use in determining the surface of an object from at least one electronic signal produced by a mini-moire sensor is presented.
135
Patent
Electromagnetic scanning imager
David S. Holbrook,Christopher P. Adams,Brent Gregorich,Umesh Rajani,Jason P. Whitmire,Scott D. Bublitz,Jeffrey C. Hessenberger,John S. Scott,Mark Huggins,Matthew J. Mergener +9 more
- 01 Dec 2009
TL;DR: In this paper, an optical system that is optically coupled to the source focuses radiation received therefrom onto an object plane, and directs at least a portion of the focused radiation propagating back from the object plane onto an image plane.
104
Energy partitioning for a crack under remote shear and compression
TL;DR: In this paper, a hybrid technique employing moire interferometry as an experimental boundary condition to a finite element method (FEM) was employed for through-cracked polycarbonate plates under remote shear and compression.
51
Patent
Remote measurement of near-surface physical properties using optically smart surfaces
James D. Trolinger,James E. Millerd +1 more
- 02 Jul 1993
TL;DR: In this paper, a sensor comprising a holographic diffraction grating in a thin film, formed on or affixed to the surface of the test object, thereby forming an "optically smart surface".
49
References
Developments In Moire Interferometry
TL;DR: In this article, a review of the progress in high-sensitivity moire interferometry is presented, with a comparison of the theoretical limit of X/2 displacement per fringe in one demonstration.
106
Moire interferometry near the theoretical limit.
Eric M. Weissman,Daniel Post +1 more
TL;DR: Effectiveness of moire interferometry near the theoretical limit was proved and in-plane displacement fringes of excellent definition were obtained throughout the 76 x 51-mm field of view.
Moiré interferometry with ±45-deg gratings
Robert Czarnek,Daniel Post +1 more
TL;DR: In this article, a vector quantity related to the fringe gradient in the interference pattern is defined and found effective for visualizing and describing the image-forming rays, which can be used to construct an apparatus for moire interferometry.
11
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