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Proceedings Paper

Reflectivities of light-absorptive coatings within visible-wavelength range
Author(s): Kamil A. Moldosanov; Reinhold Henneck; Alexander M. Skyrnnikov; Victor A. Kashirin; Vladimir P. Makarov; Gennady A. Kobtsov; Michael A. Samsonov; Lilia S. Kim
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Paper Abstract

This paper concerns the light-absorptive coating intended for reduction of stray sunlight in the satellite-borne optical instrumentation and particle-analyzing apparatus operating in open space under intensive solar illumination. Through the inner surfaces are the passive elements in optical instruments, nonetheless the condition and reflectivity of their surfaces can have noticeable effect on the signal-to-noise ratio of their detectors. In order to reduce an influence of the stray light on sensitivity of devices, the reflectivities of inner surfaces are strived to keep minimum in those wavelengths ranges, where the detectors spectral responses are high. We measured reflectivities of several types of traditional light-absorptive coating and also tested our own approach to development of low reflectivity materials. The reflectivities were measured in visible and near-infrared wavelengths ranges (400 to 927 nm), as well as at the hydrogen Lyman-α line (121.6 nm), the most intensive line of the solar UV radiation. Also, the values of the solar absorptance αs and the emissivity ε were measured. They made it possible to classify the investigated coating with their respects to a possible use in converters of solar radiation into the heat. Conclusions are given on application of diverse coatings depending on the instrument's detector type, operational wavelengths range, and operating conditions.

Paper Details

Date Published: 24 October 2000
PDF: 12 pages
Proc. SPIE 4093, Current Developments in Lens Design and Optical Systems Engineering, (24 October 2000); doi: 10.1117/12.405195
Show Author Affiliations
Kamil A. Moldosanov, Special Design Office OKB "Aalam" (Kirgizstan)
Reinhold Henneck, Paul Scherrer Institute (Switzerland)
Alexander M. Skyrnnikov, Kyrgyz-Russian Slavic Univ. (Kirgizstan)
Victor A. Kashirin, Special Design Office OKB "Aalam" (Kirgizstan)
Vladimir P. Makarov, Institute of Physics (Kirgizstan)
Gennady A. Kobtsov, Institute of Physics (Kirgizstan)
Michael A. Samsonov, Kyrgyz-Russian Slavic Univ. (Kirgizstan)
Lilia S. Kim, Institute of Physics (Kirgizstan)

Published in SPIE Proceedings Vol. 4093:
Current Developments in Lens Design and Optical Systems Engineering
Robert E. Fischer; Robert E. Fischer; R. Barry Johnson; Warren J. Smith; Warren J. Smith; William H. Swantner, Editor(s)

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