Statistics – Applications
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pfsa.rept.....l&link_type=abstract
Unknown
Statistics
Applications
Aluminum, Carbon, Infrared Reflection, Mirrors, Protective Coatings, Reflectance, Diamonds, Dielectrics, Incidence, Refractivity, Spectral Reflectance, Telescopes
Scientific paper
The use of an infrared transmitting diamond-like carbon coating for metallic reflectors to correct for reflectivity losses in the 8 to 12 micron band is proposed. Many thin passivation layers have severe reflectivity losses when used at oblique incidence. Measurements and calculations illustrating this effect are presented. The destructive interference appears at angles lower than a limit related to the refractive index and the extinction coefficient. An expression for that limit is given. Carbon overcoating of metallic reflectors is shown to upgrade the reflectivity in the 8 to 12 micron band, at angles of incidence of 45 and 60 deg. Applications such as catadioptric telescopes permanently exposed to the atmosphere can be envisaged using this technique.
Ball Jesse G.
Lettington Alan H.
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