Fluorophosphate glasses and the glass material for press molding, optical component blank, as a production mannered null glass component of the optical component and those production

摘要

PROBLEM TO BE SOLVED: To provide fluorophosphate glass which has ultra low dispersibility and stability and can be preferably used for a glass material for press molding, an optical element blank, and optical elements.;SOLUTION: The fluorophosphate glass contains P⁵⁺ of 3-25 cation%, Al³⁺ of more than 30 cation% and not more than 40 cation%, Li⁺ of 0.5-20 cation% and F^- of 65 anion% or more, and by having a liquid phase temperature of not higher than 700°C.;COPYRIGHT: (C)2009,JPO&INPIT