GB869616A - Improvements in or relating to optical glasses - Google Patents

Improvements in or relating to optical glasses

Info

Publication number
GB869616A
GB869616A GB10812/58A GB1081258A GB869616A GB 869616 A GB869616 A GB 869616A GB 10812/58 A GB10812/58 A GB 10812/58A GB 1081258 A GB1081258 A GB 1081258A GB 869616 A GB869616 A GB 869616A
Authority
GB
United Kingdom
Prior art keywords
weight
relating
elements
optical glass
optical glasses
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
GB10812/58A
Inventor
Heinz Broemer
Norbert Meinert
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar GmbH
Ernst Leitz GmbH
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 Ernst Leitz Wetzlar GmbH, Ernst Leitz GmbH filed Critical Ernst Leitz Wetzlar GmbH
Publication of GB869616A publication Critical patent/GB869616A/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
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
    • C03C3/155—Silica-free oxide glass compositions containing boron containing rare earths containing zirconium, titanium, tantalum or niobium
    • 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
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths

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

869,616. Optical glass. LEITZ G.m.b.H., ERNST. April 3, 1958, No. 10812/58. Class 56. An optical glass comprises by weight 16-32% B 2 O 3 , 10-23% Al 2 O 3 , 25-50% La 2 O 3 and 8-31% of one or more oxides of a bivalent element or elements, the sum of the contents of B 2 O 3 and Al 2 O 3 amounting to at least 29% and at most 48À3%, the balance, if any, consisting of other compatible ingredients. The glass may additionally contain up to 10% by weight of zirconium oxide and/or up to 10% by weight of tantalum oxide. Specified bivalent elements are calcium, magnesium, barium and cadmium. The glasses may be made by smelting the ingredients in a platinum crucible at 1200‹- 1300‹C. and stirring the melt until it has cooled to about 1000‹C.
GB10812/58A 1958-03-31 1958-04-03 Improvements in or relating to optical glasses Expired GB869616A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH5773758A CH366931A (en) 1958-03-31 1958-03-31 Optical glass

Publications (1)

Publication Number Publication Date
GB869616A true GB869616A (en) 1961-05-31

Family

ID=4521290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10812/58A Expired GB869616A (en) 1958-03-31 1958-04-03 Improvements in or relating to optical glasses

Country Status (2)

Country Link
CH (1) CH366931A (en)
GB (1) GB869616A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5674789A (en) * 1993-11-25 1997-10-07 Cerdec Aktiengesellschaft Keramische Faben Lead- and cadmium-free finely divided glass frit compositions

Also Published As

Publication number Publication date
CH366931A (en) 1963-01-31

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