Optical surface topography mapping system

Details Optical surface topography mapping system Optical surface topography mapping system

1976-03-04

1978-01-24

O'Connor, Edna M.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 2, G03B 1754

Patent

active

040706834

ABSTRACT:
A first laser beam is reflected from the front and rear surfaces of a partially silvered glass slab generating a diverging set of interference fringes which are collimated by a positive lens. A second set of fringes is generated by a second laser beam and second partially silvered glass slab and is positioned to project through the first slab and is collimated by the same positive lens. The second pattern is aligned coaxially and mutually perpendicular to the first pattern creating a rectangular parallopiped grid pattern projected upon an observed object.

REFERENCES:
patent: 3169459 (1965-02-01), Friedberg et al.
patent: 3594583 (1971-07-01), Sheldon
patent: 3695749 (1972-10-01), Stapleton
patent: 3749493 (1973-07-01), Macovski
Time-Life, Frontiers of Photography, "Holograms in Color", 1972.
IBM Technical Disclosure, "Forming a Stereo View", Pennington et al., vol. 12, No. 3, 8-1969.

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