Accession Number : AD0699674

Title :   OIL-VAPOUR CONTAMINATION OF SATELLITE OPTICAL SURFACES.

Descriptive Note : Technical rept.,

Corporate Author : ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (ENGLAND)

Personal Author(s) : Williams,T. N.

Report Date : MAR 1969

Pagination or Media Count : 21

Abstract : The effects of oil-vapour contamination on satellite optical surfaces when exposed to high vacuum and ultra-violet irradiation were investigated. The oil coatings tried, when exposed to ultra-violet radiation under vacuum, caused severe and apparently permanent degradation of optical performance in the ultra-violet region of the electromagnetic spectrum. It is concluded that no oil or grease should be used in satellite mechanisms which are near optical surfaces used for measurements in the ultra-violet. (Author)

Descriptors :   (*SPACECRAFT COMPONENTS, ULTRAVIOLET EQUIPMENT), (*ULTRAVIOLET EQUIPMENT, CONTAMINATION), OILS, DEGRADATION, VACUUM, REFLECTIVITY, OPTICAL EQUIPMENT COMPONENTS, GREAT BRITAIN

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE