Special Features
Hquarter wave magnesium fluoride centered at 1.48 microm; reflectivity at 45 degrees porm 2 degrees angle of incidencefor 1.543 microm "s" polarization lessthan 2.5 pct; wavefront distortion 1/8at 0.633 microm in clear aperture; matlosfn-18, type 913-324, class 1, gradea; surface flatness 0.633 m; surface quality in aperture 40-2-0; clear aperture eliptical 0.375 min x 0.530 min; 0530 min; 0.500 in. H; 0.640 in. W; 0.039 in thick; coating both sides per miil-c-675
