Compact portable diffraction moire interferometer

Details Compact portable diffraction moire interferometer Compact portable diffraction moire interferometer

1988-05-23

1989-07-25

Willis, Davis L.

Optics: measuring and testing

Material strain analysis

By light interference detector

356354, G01B 902

Patent

active

048506931

ABSTRACT:
A compact and portable moire interferometer used to determine surface deformations of an object. The improved interferometer is comprised of a laser beam, optical and fiber optics devices coupling the beam to one or more evanescent wave splitters, and collimating lenses directing the split beam at one or more specimen gratings. Observation means including film and video cameras may be used to view and record the resultant fringe patterns.

REFERENCES:
patent: 4432239 (1984-02-01), Bykov
patent: 4459027 (1984-07-01), Kafri et al.
patent: 4474466 (1984-10-01), McDonach et al.
patent: 4577940 (1986-03-01), Krasinski et al.
patent: 4641972 (1987-10-01), Halioua et al.
McDonach et al; Optics and Lasers in Engineering, vol. 1, No. 2, pp. 85-105, 12/80.
McKelvie et al; Proc. SPIE, vol. 814, pp. 464-474, 1987.

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