Testing and qualification of optical glasses for use in a space radiation environment; the advantages and pitfalls of using a parametric approach

Details Testing and qualification of optical glasses for use in a space radiation environment; the advantages and pitfalls of using a parametric approach Testing and qualification of optical glasses for use in a space radiation environment; the advantages and pitfalls of using a parametric approach

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.540..633g&link_type=abstract

In: Proceedings of the 9th International Symposium on Materials in a Space Environment, 16-20 June 2003, Noordwijk, The Netherla

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Methodology

Space Environment, Materials, Optical Glasses

Scientific paper

After decades of continuous research, the prediction of near-earth space radiation impact on spectral transmission of optical glasses remains an issue. The radiation response of the widely available range of multi-component commercial glasses under various irradiation scenarios relevant for space applications still requires a due assessment. It has been proposed recently that a pragmatic parametric approach has merit in such a situation. This approach is based on parameterization of induced absorption spectra in terms of Gaussian absorption bands. Such a parameterization remains always questionable when based on optical measurements only. However in this paper we discuss a practical methodology for deriving and using physically meaningful parameters. We use a time sequence of radiation-induced absorption spectra and introduce a kinetic criterion to select a physically reasonable description. The combination of data obtained on samples with different thickness allowed us to achieve sensible results for a number of commercial optical glasses (NBK7, NLaK9, BSC7 and NK5).

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