Pv. Batyan et al., REFERENCE ELEMENTS OF AUTOCOLLIMATION GONIOMETERS WITH IMPROVED METROLOGICAL CHARACTERISTICS, Journal of optical technology, 64(1), 1997, pp. 50-54
This paper discusses a new type of reference element based on a corner
reflector for an autocollimation goniometer that measures all three a
ngles of rotation of a test object at a variable distance. (C) 1997 Th
e Optical Society af America.