MIL-Q-47057A, MILITARY SPECIFICATION: QUARTZ, FUSED, OPTICAL GRADE (16 JUL 1990) [NO S/S DOCUMENT]

MIL-Q-47057A, MILITARY SPECIFICATION: QUARTZ, FUSED, OPTICAL GRADE (16 JUL 1990) [NO S/S DOCUMENT]., This specification establishes the requirements for two types of clear optical grade fused quartz to be used in the fabrication of optical elements where a low coefficient of thermal expansion is desired.