This paper presents the results of an experimental investigation of the degradation of a series-produced optical coating made from lead fluoride on a substrate made from IKS-25 chalcogenide glass after the combined action of high-speed fluxes of solid microparticles (carbon-containing microparticles of size 0.1-200μm, with a speed of 0.1-30km/sec and a flux density of up to 10⁴cm⁻²sec⁻¹), a relaxing plasma (with a concentration of atoms and ions of oxygen, carbon, hydrogen, nitrogen and their compounds of about 10¹⁴−10¹⁷cm⁻³, a flux density of up to 10²³cm⁻²sec⁻¹, and a flux speed up to 10km/sec), short-wavelength radiation (with an exposure of 0.1J/cm² in the vacuum UV region of wavelengths 90-180nm and 1.2J/cm² in the UV region with wavelengths 180-400nm) under vacuum conditions (with pumping to 10⁻⁷-10⁻⁵Torr) accompanying thermal cycling (in the temperature range −20to+160°C). An estimate is given of the possibility of using the described methods to physically model the action on optical materials of the main harmful factors in low near-earth orbits.

© 2008 Optical Society of America

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