Optics: measuring and testing – Fiducial instruments
Patent
1979-09-26
1981-10-27
McGraw, Vincent P.
Optics: measuring and testing
Fiducial instruments
350 64, 350287, 356138, 356248, G07B 1126, G02B 718
Patent
active
042970318
ABSTRACT:
A process and apparatus for sweeping a flat optical light plane perpendicular to a primary input laser beam for use in precise alignment applications includes rotatably mounting a penta prism onto a spindle such that the laser beam intersects the entrance face of the penta prism. In addition, the path of the laser beam intersects the actual axis of rotation of the spindle at a designated point which is positioned as a function of the geometry of the penta prism, and the first reflecting surface of the penta prism is located intermediate the laser device and said designated point. In operation, rotation of the penta prism about the spindle results in the development of a flat, true optical light plane.
REFERENCES:
patent: 2633050 (1953-03-01), Baker
patent: 3684381 (1972-08-01), Zoot
patent: 3771876 (1973-11-01), Ljungdahl et al.
"Penta Prism Behavior in Optical Tooling Techniques, Effect of Changes in Penta Prism Position and Alignment," No. 1 in a Series of Technical Papers for the Advancement of Metrology, Engis Equipment Company, 431 South Dearborn Street Chicago, Ill.
Casella Anthony J.
McGraw Vincent P.
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