The mirror's primary surface is precision ground and polished to stated accuracy and certified by a Zygo GPI-XP interferometer. The secondary surface is pitch positioned to window quality. Typical uses include demanding imaging systems, laser applications, holography, optical path folding, and as reflectors for autocollimating requirements.
Edmund Optics, 101 Gloucester Pike, Barrington, NJ 08007, (800) 363-1992, edmundoptics.com