Optical: systems and elements – Single channel simultaneously to or from plural channels
Patent
1989-03-23
1992-01-07
Arnold, Bruce Y.
Optical: systems and elements
Single channel simultaneously to or from plural channels
359834, G02B 718
Patent
active
050784730
ABSTRACT:
The apparatus of the present invention provides means for obtaining accurate, dependable, measurement of bearings and directions for geologic mapping in subterranean shafts, such as, for example, nuclear waste storage investigations. In operation, a laser beam is projected along a reference bearing. A pyramid is mounted such that the laser beam is parallel to the pyramid axis and can impinge on the apex of the pyramid thus splitting the beam several ways into several beams at right angles to each other and at right angles to the reference beam. The pyramid is also translatable and rotatable in a plane perpendicular to the reference beam.
REFERENCES:
patent: 3622232 (1971-11-01), Munnerlyn
patent: 3726600 (1973-04-01), Carmack et al.
patent: 3820903 (1974-06-01), Kindl et al.
Beason Steven C.
Fairer George
McKeown Mark H.
Arnold Bruce Y.
Gass Rebecca D.
Koltos E. Philip
The United States of America as represented by the Secretary of
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