OPTICAL GLASS WITH HIGH CHEMICAL STABILITY OF MORE THAN 1.60 REFLACTIVE INDEX AND MORE THAN 58 ABBE'S NUMBER AND RESISTANCE TO PHASE SEPARATION AND TO CRYSTALLIZATION

Title:

OPTICAL GLASS WITH HIGH CHEMICAL STABILITY OF MORE THAN 1.60 REFLACTIVE INDEX AND MORE THAN 58 ABBE'S NUMBER AND RESISTANCE TO PHASE SEPARATION AND TO CRYSTALLIZATION

Document Type and Number:

Japanese Patent JPS6071539

Kind Code:

A

Abstract:

An optical glass, nd>/=1.60 and vd>/=58, having a high chemical stability as well as resistance to phase separation and crystallization, comprises in percent by weight: -SiO2 21.5-27.0; B2O3 23.5-30.0 SrO 16.0-24.0; -La2O3 10.0-20; Al2O3 1.5-5.0; BaO 5.0-14.0; -ZrO2 0-4.0; Li2O 0.5-5.0; Na2O 0.8-2.5; -K2O 0-2.0. -

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Inventors:

RUUDOUITSUHI ROSU
FUORUKUMAA GAIRAA

Application Number:

JP17946484A

Publication Date:

April 23, 1985

Filing Date:

August 30, 1984

Export Citation:

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Assignee:

SCHOTT GLASWERKE

International Classes:

C03C3/064; C03C3/066; C03C3/068; (IPC1-7): C03C3/064; C03C4/00

Attorney, Agent or Firm:

Mikio Hatta

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