GB408993A - Improvements in optical glasses - Google Patents

Improvements in optical glasses

Info

Publication number
GB408993A
GB408993A GB20671/32A GB2067132A GB408993A GB 408993 A GB408993 A GB 408993A GB 20671/32 A GB20671/32 A GB 20671/32A GB 2067132 A GB2067132 A GB 2067132A GB 408993 A GB408993 A GB 408993A
Authority
GB
United Kingdom
Prior art keywords
per cent
glasses
july
schott
glass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB20671/32A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott AG
Original Assignee
Jenaer Glaswerk Schott and Gen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jenaer Glaswerk Schott and Gen filed Critical Jenaer Glaswerk Schott and Gen
Publication of GB408993A publication Critical patent/GB408993A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead

Abstract

408,993. Glass manufacture. JENAER GLASWERK SCHOTT & CEN., Otto-Schott- Strasse, Jena, Germany. July 22, 1932, No. 20671. Convention date, July 29, 1931. Drawings to Specification. [Class 56.] Titanium dioxide is added to optical glasses of high refractive index in order to reduce the tendency of the glass to become stained by humidity or by weak acids. The glasses concerned contain less than 55 per cent of silica, more than 25 per cent of bivalent oxides, and less than 10 per cent of alkaline-earth oxides. The amount of titanium oxide added is between 0.5 and 20 per cent, and preferably is not greater than 10 per cent. Examples of a number of glasses are given in the description. Specification 388,118 is referred to.
GB20671/32A 1931-07-29 1932-07-22 Improvements in optical glasses Expired GB408993A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE408993X 1931-07-29

Publications (1)

Publication Number Publication Date
GB408993A true GB408993A (en) 1934-04-23

Family

ID=6422362

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20671/32A Expired GB408993A (en) 1931-07-29 1932-07-22 Improvements in optical glasses

Country Status (2)

Country Link
FR (1) FR740399A (en)
GB (1) GB408993A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762713A (en) * 1953-12-03 1956-09-11 Bausch & Lomb Flint glasses for multifocal lenses
DE2523634A1 (en) * 1974-06-03 1975-12-11 Corning Glass Works OPHTHALMIC GLASS
WO2006072449A2 (en) * 2005-01-04 2006-07-13 Schott Ag Glass for lamp with external electrodes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762713A (en) * 1953-12-03 1956-09-11 Bausch & Lomb Flint glasses for multifocal lenses
DE2523634A1 (en) * 1974-06-03 1975-12-11 Corning Glass Works OPHTHALMIC GLASS
WO2006072449A2 (en) * 2005-01-04 2006-07-13 Schott Ag Glass for lamp with external electrodes
WO2006072449A3 (en) * 2005-01-04 2007-01-25 Schott Ag Glass for lamp with external electrodes

Also Published As

Publication number Publication date
FR740399A (en) 1933-01-24

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