parameter for coating: Dielectric high reflective film-0 degrees high reflection,greater than 99% over wavelength ranges 900 to 1300 nm. parameter for prism: Material:H-K9L,H-BaK7,etc; Surface quality:40-20/20-10; Dimensional tolerance:plus or minus 0.05mm; Surface flatness:1/2 lambda; Angle tolerance:plus or minus 2 arc min.
