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Title: Pyramid beam splitter

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.
 [1] ;  [2] ;  [3]
  1. (Golden, CO)
  2. (Lakewood, CO)
  3. (Boulder, CO)
Publication Date:
OSTI Identifier:
Report Number(s):
US 5078473
DOE Contract Number:
Resource Type:
Research Org:
Country of Publication:
United States
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