Broadband emission material and white light emission material
AssigneeCentral Glass Company, Limited
InventorsHideyuki Okamoto, Ken Kasuga
Life of this patent
Estimating the term…
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.
Claims19
A broadband emission material comprising:
- 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 an 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 an element selected from the group consisting of Al, Ba, Sr, Ca and Mg and an 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 2 mol % of BaF2.
A white light emission material comprising:
- a broadband emission material including:
- a fluoride lass 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 an 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,
- the fluoride glass including 1 to 15 mol % of at least one halide of an element selected from the group consisting of Al, Ba, Sr, Ca and Mg and an element selected from the group consisting of Cl, Br and I,
- the alkaline-earth fluorides including 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;
- and
- 0.01 to 2 mol % of at least one halide of an element selected from the group consisting of Mn, Sm and Pr being incorporated in the fluoride glass.
A white light glass emission material comprising:
- a broadband emission material including:
- a fluoride lass 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 an 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 an element selected from the group consisting of Al, Ba, Sr, Ca and Mg and an element selected from the group consisting of Cl, Br and I;
- 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;
- and
- wherein the total amount of Ba cations contained in the fluoride glass is 0 to 5 mol %.
Dependencies are inferred from the claim text.