Bm. Ayupov et Vv. Sokolov, BROADENING THE REFRACTIVE-INDEX MEASUREMENT RANGE OF SOLIDS ON THE PR-2 REFRACTOMETER, Journal of optical technology, 61(7), 1994, pp. 556-557
This paper proposes to measure the refractive indices of glasses and i
sotropic crystals, using the prism method on a PR-2 Pulfrikh refractom
eter (Karl Zeiss, Jena). A device is developed for mounting and adjust
ing the prisms, and an optical measurement layout is chosen. The optic
al constants for the visible region are determined for highly refracti
ng glasses of various compositions from the lanthanum sulphide-gallium
oxide system.