FIELD: engineering of light-based equipment and integration optics, connected to production of infrared light filters of cutting and band types, absorbing visible emission and letting short-wave and long-wave close infrared emission through.
SUBSTANCE: in accordance to method for manufacturing infrared light filter, sodium fluoride crystal is irradiated by beam of Helium ions He+ with energy 1,5-4,6 MeV, while irradiation of working facet of crystal is performed up to fluence (1,2-3,0)·1016 ion/cm2.
EFFECT: improved ability to absorb visible range emission, possible operation under condition of low temperatures, increased resistance to radiation-related effects.
2 cl, 1 dwg
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