... . The windows should be selected according to following criteria:Window material, Color of material, Dimensions, AR (anti-reflectivity ... Type of intermediate layers, Construction, Gasket type, Frame finish1. Window materialOptical glass, Plexiglas (PMMA), Makrolon (polycarbonate), PVC2. Color ... can be blackened so as to enhance contrast and plated with various metals to improve the performance. To ...