GB1280448A - Improvements in or relating to optical glass - Google Patents

Improvements in or relating to optical glass

Info

Publication number
GB1280448A
GB1280448A GB5845870A GB5845870A GB1280448A GB 1280448 A GB1280448 A GB 1280448A GB 5845870 A GB5845870 A GB 5845870A GB 5845870 A GB5845870 A GB 5845870A GB 1280448 A GB1280448 A GB 1280448A
Authority
GB
United Kingdom
Prior art keywords
glass
hour
dec
oxidizing agent
optical 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
GB5845870A
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
Carl Zeiss AG
Original Assignee
Jenaer Glaswerk Schott and Gen
Carl Zeiss AG
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
Priority claimed from DE19691962433 external-priority patent/DE1962433C/en
Application filed by Jenaer Glaswerk Schott and Gen, Carl Zeiss AG filed Critical Jenaer Glaswerk Schott and Gen
Publication of GB1280448A publication Critical patent/GB1280448A/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
    • C03C3/062—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
    • 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
    • C03C3/062—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
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
    • 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
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
    • C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
    • C03C3/112—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine
    • 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
    • C03C3/11—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen
    • C03C3/112—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine
    • C03C3/115—Glass compositions containing silica with 40% to 90% silica, by weight containing halogen or nitrogen containing fluorine containing boron

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)

Abstract

1280448 Glass composition CARL-ZEISSSTIFTUNG [trading as JENAER GLASWERK SCHOTT & GEN] 9 Dec 1970 [12 Dec 1969] 58458/70 Heading C1M An optical glass has the percentage weight composition SiO 2 20-48, Na 2 O + K 2 O 7-32, TiO 2 + WO 3 30-44, WO 3 0-9, F 0À65-7À2, B 2 O 3 0-9, PbO 0-17, Al 2 O 3 0-5, Sb 2 O 3 0-5 and MgO + CaO + SrO + BaO + ZnO 0-5. The fluorine content is provided by 2-22 KF or 1-10 AlF 3 . The glass is produced in a process in which an oxidizing agent is present to reduce colour formation. The oxidizing agent may be an arsenate, oxygen or an oxidizing gas. In a preferred example the glass forming batch is melted at 1230‹ C. and refined for 1 hour at 1260‹ C. and cast at 1120‹ C. The glass is then transferred to a cooling furnace maintained at 480‹ C., kept for 1 hour at this temperature and then cooled at a rate of 7‹ C./hour to room temperature. Such glass a has an expansion coefficient of 116À3 x 10<SP>-7</SP> ‹C<SP>-1</SP>.
GB5845870A 1969-12-12 1970-12-09 Improvements in or relating to optical glass Expired GB1280448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691962433 DE1962433C (en) 1969-12-12 Optical glasses of extreme optical position n deep d between 1.648 and 1.751 and v deep d between 30.8 and 24.1 and processes for their production

Publications (1)

Publication Number Publication Date
GB1280448A true GB1280448A (en) 1972-07-05

Family

ID=5753728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5845870A Expired GB1280448A (en) 1969-12-12 1970-12-09 Improvements in or relating to optical glass

Country Status (2)

Country Link
FR (1) FR2071786A5 (en)
GB (1) GB1280448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2827274A1 (en) * 2001-07-11 2003-01-17 Schott Glas OPTICAL LENSES, HEAVY FLINT TYPE, LEAD FREE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2827274A1 (en) * 2001-07-11 2003-01-17 Schott Glas OPTICAL LENSES, HEAVY FLINT TYPE, LEAD FREE

Also Published As

Publication number Publication date
DE1962433B2 (en) 1973-01-11
DE1962433A1 (en) 1971-06-24
FR2071786A5 (en) 1971-09-17

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee