II-VI Optical Systems is a leading supplier of infrared and visible domes, windows, lenses, and electro-optical mechanical assemblies. Large format sapphire windows and window assemblies are part of II-VI Optical Systems' core product offering. Anti-reflective, conductive, and durable exterior thin film optical coatings enhance performance needed for the aerospace and defense industries. Optical sub-assemblies are key components in military fire control, missile guidance, reconnaissance & surveillance, and thermal imaging systems. II-VI Optical Systems is registered in quality standards AS9100C and ISO9001:2008 in addition to Medical Device standard ISO 13485 through SAI Global.