Non-lead optical glass and optical fiber

Details Non-lead optical glass and optical fiber Non-lead optical glass and optical fiber

C - Chemistry, Metallurgy

03

C

C03C 3/14 (2006.01) C03C 3/064 (2006.01) C03C 3/066 (2006.01) C03C 3/068 (2006.01) C03C 3/145 (2006.01) C03C 3/15 (2006.01) C03C 3/155 (2006.01) C03C 3/253 (2006.01) C03C 13/04 (2006.01) G02B 6/00 (2006.01)

Patent

CA 2527308

A lead-free optical glass having a chemical composition, in mole %: Bi2O3: 45 to 75 %, B2O3: 12 to 45 %, Ga2O3: 1 to 20 %, In2O3: 1 to 20 %, ZnO: 0 to 20 %, BaO: 0 to 15 %, SiO2 + Al2O3 + GeO2: 0 to 15 %, MgO + CaO + SrO: 0 to 15 %, SnO2 + TeO2 + TiO2 + ZrO2 + Ta2O3 + Y2O3 + WO3: 0 to 10 %, CeO2: 0 to 5 %, with the proviso that Ga2O3 + In2O3 + ZnO >= 5 %; and an optical fiber having a core comprising the lead-free optical glass.

L'invention concerne un verre optique sans plomb présentant la composition chimique suivante, en pourcentage molaire : 45 à 75 % de Bi¿2?O¿3?, 12 à 45 % de B¿2?O¿3?, 1 à 20 % de Ga¿2?O¿3?, 1 à 20 % de In¿2?O¿3?, 0 à 20 % de ZnO, 0 à 15 % de BaO, 0 à 15 % de SiO¿2? + Al¿2?O¿3? + GeO¿2?, 0 à 15 % de MgO + CaO + SrO, 0 à 10 % de SnO¿2? + TeO¿2? + TiO¿2? + ZrO¿2? + Ta¿2?O¿3? + Y¿2?O¿3? + WO¿3? et 0 à 5 % de CeO¿2?, à condition que la somme de Ga¿2?O¿3? + In¿2?O¿3? + ZnO soit supérieure ou égale à 5 %. L'invention concerne également une fibre optique dont le coeur comprend ce verre optique sans plomb.

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