Paper
31 March 1982 Bidirectional Reflectance Distribution Function (BRDF) Measurements Of Sunshield And Baffle Materials For The Infrared Astronomy Satellite (IRAS) Telescope
Sheldon M. Smith
Author Affiliations +
Abstract
Measurements of the far-infrared bidirectional reflectance distribution functions (BRDF) of four samples of Martin Black coating and one sample of gold-coated aluminum from the telescope to be flown on the Infrared Astronomy Satellite (IRAS) are presented. At incidence angles near 35°, Martin Black is a diffuse reflector at wavelengths as long as 36 μm. However, by 112 μm it has become quite specular. The gold coated aluminum sample from the IRAS sunshield has a visible grain which causes a strong diffraction enhancement of the BRDF at large nonspecular angles. This enhancement from the sunshield will increase the stray light level inside the telescope.
© (1982) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sheldon M. Smith "Bidirectional Reflectance Distribution Function (BRDF) Measurements Of Sunshield And Baffle Materials For The Infrared Astronomy Satellite (IRAS) Telescope", Proc. SPIE 0304, Modern Utilization of Infrared Technology VII, (31 March 1982); https://doi.org/10.1117/12.932688
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Cited by 1 scholarly publication.
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KEYWORDS
Bidirectional reflectance transmission function

Space telescopes

Reflectivity

Diffraction gratings

Sensors

Telescopes

Diffraction

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