Material trades between Be, SiC, and VQ aluminum for tactical systems: update referencing the current state-of-the-art

Trade parameters and relative advantages of beryllium, silicon carbide and Visible Quality (VQ) aluminum in terms of the currently available optical finishing characteristics, as well as their physical and thermal characteristics are presented. Combinations of constraints, environments, mount options and required performance may affect the choice between these materials. Guidelines are provided which may help a designer evaluate choices based on the current state of the art.