NASA NTRS · 19940000305
Wide-Field Retroreflectors
Abstract
Retroreflectors made of concentric spherical optical elements developed for use in interferometric metrological systems. Used to provide reference point on structure to be aligned precisely in two or three dimensions by use of intersecting laser beams. Acceptance angle much larger than that of cat's-eye or corner-cube retroreflector: Simultaneously reflects laser beams separated by angles as large as 180 degrees.
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Page, Norman A., Tubbs, Eldred F.. 1994-05-01. Wide-Field Retroreflectors. https://ntrs.nasa.gov/citations/19940000305
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