Broadband Emission Material and White Light Emission Material

Abstract

A broadband emission material according to the present invention includes: a fluoride glass containing 20 to 45 mol % of AlF3, 25 to 63 mol % of alkaline-earth fluorides in total and 3 to 25 mol % of at least one fluoride of element selected from the group consisting of Y, La, Gd and Lu; and ytterbium ions incorporated in the fluoride glass as divalent rare-earth ions so as to serve as a luminescent center, wherein the fluoride glass includes 1 to 15 mol % of at least one halide of element selected from the group consisting of Al, Ba, Sr, Ca and Mg and element selected from the group consisting of Cl, Br and I; and wherein the alkaline-earth fluorides includes 0 to 15 mol % of MgF2, 7 to 25 mol % of CaF2, 0 to 22 mol % of SrF2 and 0 to 5 mol % of BaF2.

Dependencies are inferred from the claim text.