The NASA Long Duration Exposure Facility (LDEF) was launched by the Space Shuttle to transport various science and technology experiments both to and from space, providing investigators with the opportunity to study the effects of the space environment on materials and systems used in space-flight applications. Preliminary results to be discussed consist of trasmission measurements obtained and processed from an infrared spectrophotometer both before (1983) and after (1990) exposure compared with unexposed control specimens, together with results of detailed microscopic and general visual examinations performed on the experiment. The principal lead telluride (PbTe) and zinc sulphide (ZnS) based multilayer filters selected for this preliminary investigation consist of: an 8-12 micron low pass edge filter, a 10.6 micronm 2.5% half bandwidth (HBW) double half-wave bandpass filter, and a 10% HBW triple half-wave bandpass filter at 15 micron. Optical substrates of MgF(2) and KRS-5 (TlBrI) will also be discussed. The preliminary results discussed in this paper now establishes further confidence in the long term spectral and mechanical stability of infrared filters and materials exposed to the space environment.
Preliminary results from infrared multilayer filters and materials exposed to the space environment on the NASA LDEF mission
Verläufige Ergebnisse von Infrarot-Mehrschichtfiltern und -materialien, die auf der LDEF-Mission der NASA dem Weltraum ausgesetzt waren
Proceedings of SPIE, Infrared Technology and Applications ; 1320 ; 407-419
1990
13 Seiten, 9 Bilder, 6 Quellen
Aufsatz (Konferenz)
Englisch
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