UV Enhanced Aluminium Mirrors
Aluminium
coatings make excellent broadband reflectors with a bandwidth extending from 200
nm to the near IR. For use in the
ultra-violet, Aluminium may be enhanced by superimposing
a multilayer dielectric coating. This
provides a higher reflectance at short wavelengths
as well as protection for the soft metallic film.
The
enhancement may be chosen to peak at a particular wavelength in the UV, such as
an excimer laser line for example. The
mirrors may also be optimised either for normal or 45° angle of incidence.
The
average reflectance of these enhanced aluminium mirrors is at least 95% at the
peak enhancement wavelength with an average reflectance greater than 90% between
200 and 400 nm:
The substrate material used is usually UV Fused Silica
and unless otherwise requested we will supply these mirrors on λ/10
polished flats with a surface quality of 10/5 or better.
UV
Enhanced Aluminium mirrors are available in diameters of 10.0, 12.7, 19.1, 20.0,
25.4, 30.0, 38.1 or 50.8 mm or any custom size.
Peak enhancement wavelengths may be selected from 193, 248, 308, 352 nm