EFFECTS OF FRONT SURFACE ROUGHENING ON SOLAR ABSORPTIVITY OF QUARTZ REAR SURFACE MIRROR SATELLITE COATINGS.
Abstract
An experimental investigation was conducted to determine the possible increase of the solar absorptivity of quartz rear surface silvered mirrors due to surface roughness effects. It was found that solar absorptivity increased by a factor of 2.7 from a clear to an artificially roughened surface quartz mirror. Close agreement between data and analytical model results were obtained. It is postulated that absorptivity increase is caused by surface scattering of incoming and reflected radiation. Such scattering gives rise to total multiple reflections within the quartz layer due to the critical angle effects. The data obtained are applicable to prediction of satellite temperature change caused by micrometeoroid erosion of thermal coatings in a space environment. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1967
- Accession Number
- AD0815036
Entities
People
- Keith E. Starner
- Robert L. Stark
Organizations
- The Aerospace Corporation