parameter for coating:
MgF2 single-layer antireflection film-0 degrees
Lower than 2.5% reflection over wavelength ranges 400 to 750 nm;
Lower than 1.5% reflection over wavelength ranges  500 to 620 nm.

MgF2 single-layer antireflection film-45 degrees
Lower than 6% RS over wavelength ranges 400 to 750 nm;
Lower than 3% Ravg over wavelength ranges 400 to 750 nm;
Lower than 0.5% Rp over wavelength ranges 400 to 750 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.