Solar-radiation-resistance improvement of second-surface mirrors and optical solar reflectors by deposition of interference filters

Journal Article · Sat Jan 01 00:00:00 EST 1977 · J. Vac. Sci. Technol.; (United States)

DOI:https://doi.org/10.1116/1.569122· OSTI ID:7333309

Husmann, O K; Kerner, K

Second-surface mirrors (SSM) and optical solar reflectors (OSR) are employed for satellite thermal control. In space the solar-absorption coefficient ..cap alpha../sub s/ of Teflon FEP foil and also Suprasil glass deteriorates with time of solar exposure. For retardation of the ..cap alpha../sub s/ deterioration, interference filters may be deposited on such thermal control surfaces. A few filters and filter components were exposed to simulated solar radiation of seven solar constants. The solar-absorption coefficients were measured in situ under vacuum before, during, and after exposure to uv, proton, and electron radiation. Only ZnS, ThF/sub 4/, and Al/sub 2/O/sub 3/ films were stable enough for incorporation in filters. To study the solar-radiation stability of their ..cap alpha../sub s/, standard filters and those with the selected components were exposed to simulated solar radiation. The investigations confirmed that it is possible to reduce the ..cap alpha../sub s/ degradation of Teflon FEP and of Suprasil glass by application of such coatings.

• Research Organization: Messerschmitt-Boelkow-Blohm GMBH, Ottobrunn, Germany
• OSTI ID: 7333309
• Journal Information: J. Vac. Sci. Technol.; (United States), Vol. 14:1
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
SATELLITES
PROTECTIVE COATINGS
SOLAR REFLECTORS
ABSORPTION
ALUMINIUM OXIDES
EFFICIENCY
FILMS
MIRRORS
OPTICAL FILTERS
OPTICAL SYSTEMS
SOLAR RADIATION
SURFACE COATING
TEFLON
THORIUM FLUORIDES
ULTRAVIOLET RADIATION
ZINC SULFIDES
ACTINIDE COMPOUNDS
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COATINGS
DEPOSITION
ELECTROMAGNETIC RADIATION
FILTERS
FLUORIDES
FLUORINATED ALIPHATIC HYDROCARBONS
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HALOGENATED ALIPHATIC HYDROCARBONS
INORGANIC PHOSPHORS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
OXIDES
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHOSPHORS
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUORETHYLENE
RADIATIONS
SOLAR CONCENTRATORS
SULFIDES
SULFUR COMPOUNDS
THORIUM COMPOUNDS
ZINC COMPOUNDS
142000* - Solar Energy- Heat Storage- (1980-)