Optical device

Details Optical device Optical device

1985-09-09

1989-04-11

Corbin, John K.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356345, G02B 2700, G01B 902

Patent

active

048200190

ABSTRACT:
An optical device comprising a transparent plate having planar first reflecting surface and second reflecting surface, a reflector and a screen for forming interference fringes thereon. When a beam is incident on the transparent plate, a portion of the beam is reflected from the first reflecting surface, while the other portion of the beam enters the interior of the plate and is reflected at the second reflecting surface. The beam reflected from the first reflecting surface and further reflected from the reflector and the beam reflected at the second reflecting surface are superposed on the screen to produce interference fringes. The period of the interference fringes is easily variable by rotating the reflector and the screen around the line of their intersection.

REFERENCES:
patent: 1792766 (1931-02-01), Schroter
patent: 2687670 (1954-08-01), Locquin
patent: 3695749 (1972-10-01), Stapleton
patent: 4093338 (1978-06-01), Bjorklund et al.

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