Investigation of multicomponent fluoride optical materials in the UV spectral region: I. Single crystals of Ca1− x R xF2+ x ( R = Sc, Y, La, Yb, Lu) solid solutions.

Crystalline materials that are transparent in the vacuum UV spectral region and currently used have been reviewed. Transmission of crystals of solid solutions with the fluorite structure Ca1− x R xF2+ x ( R = Sc, Y, La, Yb, Lu) in the UV and vacuum UV spectral regions has been investigated. It is shown that application of different methods of purification of fluorides from some impurities can significantly improve the optical quality of fluoride multicomponent crystals in the short-wavelength spectral region. [ABSTRACT FROM AUTHOR]