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1. WO2000039041 - OPTICAL GLASS

Publication Number WO/2000/039041
Publication Date 06.07.2000
International Application No. PCT/JP1999/007214
International Filing Date 22.12.1999
Chapter 2 Demand Filed 04.07.2000
IPC
C03C 3/093 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
3Glass compositions
04containing silica
076with 40% to 90% silica by weight
089containing boron
091containing aluminium
093containing zinc or zirconium
CPC
C03C 3/093
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
3Glass compositions
04containing silica
076with 40% to 90% silica, by weight
089containing boron
091containing aluminium
093containing zinc or zirconium
Applicants
  • KABUSHIKI KAISHA OHARA [JP/JP]; 15-30, Oyama 1-chome Sagamihara-shi Kanagawa 229-1186, JP (AllExceptUS)
  • KOREKAWA, Mitsugu [JP/JP]; JP (UsOnly)
Inventors
  • KOREKAWA, Mitsugu; JP
Agents
  • ARAFUNE, Hiroshi; 5F Nikko Kagurazaka Building 18, Iwato-cho Shinjuku-ku Tokyo 162-0832, JP
Priority Data
10/36736324.12.1998JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL GLASS
(FR) VERRE OPTIQUE
Abstract
(EN)
An optical glass which is characterized as comprising, based on mass %, 60 to 65 % of SiO2, 14 to 19 % of B2O3, 5 to 9 % of Al2O3, 4 to 8 % of Li2O, 0 to 4 % of Na2O, 6.6 to 9 % of K2O (with the proviso that the sum of the amounts of Li2O, Na2O and K2O is 11 to 16 %), 0.05 to 1 % of TiO2, 0.1 to 4 % of ZnO and 0 to 2 % of Sb2O3, and having a refractive index (nd) of 1.47 to 1.53 and an Abbe value ($g(n)d) of 60 to 68. The optical glass exhibits a low incipient deformation point and has good chemical durability.
(FR)
La présente invention concerne un verre optique caractérisé en ce qu'il renferme, sur la base de son pourcentage de masse, 60 à 65 % de SiO2, 14 à 19 % de B2O3, 5 à 9 % de Al2O3, 4 à 8 % de Li2O, 0 à 4 % de Na2O, 6,6 à 9 % de K2O (à condition que la quantité globale de Li2O, Na2O, et K2O soit égale à 11 ou 16 %), 0,05 à 1 % de TiO2, 0,1 à 4 % de ZnO et 0 à 2 % de Sb2O3, et en ce qu'il présente un indice de réfraction (nd) compris entre 1,47 et 1,53 et une valeur Abbe ($g(n)d) comprise entre 60 et 68. Par ailleurs, ce verre optique présente une température de déformation basse et une bonne résistance aux agents chimiques.
Also published as
Latest bibliographic data on file with the International Bureau