NASA NTRS · 19800000452
Multibeam collimator uses prism stack
Abstract
Optical instrument creates many divergent light beams for surveying and machine element alignment applications. Angles and refractive indices of stack of prisms are selected to divert incoming laser beam by small increments, different for each prism. Angles of emerging beams thus differ by small, precisely-controlled amounts. Instrument is nearly immune to vibration, changes in gravitational force, temperature variations, and mechanical distortion.
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Minott, P. O.. 1981-04-01. Multibeam collimator uses prism stack. https://ntrs.nasa.gov/citations/19800000452
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