3.10" Elliptical Secondary Mirror

Our secondary elliptical mirrors are made from high quality low expansion glass with enhanced aluminum coatings. Before the finished side is started the backs are ground flat to a 20 micron finish. Once the main face is ground and polished into a high quality flat it is tested both before and after being coated. The minimum standard is 1/10 wave. All of our elliptical flats are coated with a three layer enhanced aluminum coating with a peak reflection of 98% in the visible spectrum. Each mirror comes with it's own interferometric data including interferogram, RMS and Peak-Valley analysis.

Manufactured by: Ostahowski Optics