Relative stress-optical coefficients of some National Bureau of Standards optical glasses

Abstract

Th e r elat iv e stress-optical coeffi cients of 27 optical glasses Il1 ttde at the)[ ational Bureau of Standard s have bee n determin ed . Th e glasses were lottded in co mp ressio n , an d t he a mo unt o f birefri ngence ,,"as m eas ur ed wi th a p ola rimeter, Llsing a qu a rte r-\" ave pl a te com -p ensator. T he stress-op t ical coeffi cients determi ned fo r t he croll'n glasses r a nged b et ween + 2.95 and + 1.82 brewsters . F or t he fli nt g lasses, a regu la r vari at ion of t h e str ess-o pt icttl coeffic ie nt wi t h lI'eigh t per ccnt of lead oxide " 'as fo u nd with " a lues mnging fro m + 3. 18 to -1.16 brclVstcrs.