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

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

parameter for prism:
Material: H-K9L,H-BaK7,etc;
Surface quality:40-20/20-10;
Dimensional tolerance:±0.05mm；
Surface flatness：λ/2；
Angle tolerance:±2'.