GB1224398A - Improvements in or relating to optical glass compositions - Google Patents

Improvements in or relating to optical glass compositions

Info

Publication number
GB1224398A
GB1224398A GB2473668A GB2473668A GB1224398A GB 1224398 A GB1224398 A GB 1224398A GB 2473668 A GB2473668 A GB 2473668A GB 2473668 A GB2473668 A GB 2473668A GB 1224398 A GB1224398 A GB 1224398A
Authority
GB
United Kingdom
Prior art keywords
optical glass
relating
glass compositions
glass
weight
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
GB2473668A
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.)
Pilkington Group Ltd
Original Assignee
Pilkington Brothers Ltd
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 Pilkington Brothers Ltd filed Critical Pilkington Brothers Ltd
Priority to GB2473668A priority Critical patent/GB1224398A/en
Priority to FR6915625A priority patent/FR2009166A1/fr
Priority to DE19691922254 priority patent/DE1922254A1/en
Publication of GB1224398A publication Critical patent/GB1224398A/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

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

1,224,398. Optical glass. PILKINGTON BROS. Ltd., and G. A. HIGHAM. 28 April, 1969 [23 May, 1968], No. 24736/68. Heading C1M. An optical glass composition contains in weight percentage based on the weight of the total composition:- B 2 O 3 .. .. .. .. 30-40 La 2 O 3 .. .. .. 35-55 Nb 2 O 5 .. .. .. .. 0À1-30 Al 2 O 3 .. .. .. .. 0À1-15 ZrO 2 .. .. .. .. 0-10 the balance, if any, consisting of other compatible constituents. The glass has a refractive index of 1À70-1À75 and a reciprocal dispersive power " Ve " of 40-50.
GB2473668A 1968-05-23 1968-05-23 Improvements in or relating to optical glass compositions Expired GB1224398A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB2473668A GB1224398A (en) 1968-05-23 1968-05-23 Improvements in or relating to optical glass compositions
FR6915625A FR2009166A1 (en) 1968-05-23 1969-05-14
DE19691922254 DE1922254A1 (en) 1968-05-23 1969-12-04 Optical glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2473668A GB1224398A (en) 1968-05-23 1968-05-23 Improvements in or relating to optical glass compositions

Publications (1)

Publication Number Publication Date
GB1224398A true GB1224398A (en) 1971-03-10

Family

ID=10216451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2473668A Expired GB1224398A (en) 1968-05-23 1968-05-23 Improvements in or relating to optical glass compositions

Country Status (3)

Country Link
DE (1) DE1922254A1 (en)
FR (1) FR2009166A1 (en)
GB (1) GB1224398A (en)

Also Published As

Publication number Publication date
DE1922254A1 (en) 1969-12-04
FR2009166A1 (en) 1970-01-30

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