Scatter losses of broadband interference coatings.
The scattering behavior of dielectric broadband coatings was measured in the 0.4-1.0-microm wavelength range. It is shown that the scattering properties are determined entirely by the surface roughness and the optical properties of the films. Scatter losses of ZnS, ThF(4), and MgF(2) monolayers are around 10(-2)%, but broadband mirrors may have losses of more than 10% due to resonant conditions within the multilayer structure. To calculate the scattering behavior of any multilayer system and to reduce the losses of broadband coatings, we developed a scattering model. The calculations are in good agreement with experimental results.
Ebert
J
J
Pannhorst
H
H
Küster
H
H
Welling
H
H