GB860121A - Improvements in or relating to optical glass - Google Patents

Improvements in or relating to optical glass

Info

Publication number
GB860121A
GB860121A GB3736757A GB3736757A GB860121A GB 860121 A GB860121 A GB 860121A GB 3736757 A GB3736757 A GB 3736757A GB 3736757 A GB3736757 A GB 3736757A GB 860121 A GB860121 A GB 860121A
Authority
GB
United Kingdom
Prior art keywords
optical glass
relating
nov
milne
parry
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
GB3736757A
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.)
ALEXANDER JAMES MILNE
Pilkington Group Ltd
Original Assignee
ALEXANDER JAMES MILNE
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 ALEXANDER JAMES MILNE, Pilkington Brothers Ltd filed Critical ALEXANDER JAMES MILNE
Priority to GB3736757A priority Critical patent/GB860121A/en
Priority to DEP21770A priority patent/DE1263998B/en
Priority to FR1208923D priority patent/FR1208923A/en
Publication of GB860121A publication Critical patent/GB860121A/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
    • C03C3/253—Silica-free oxide glass compositions containing germanium

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

860,121. Optical glass compositions. PILKINGTON BROS. Ltd., MILNE, A. J., and PARRY, R. J. Nov. 4, 1958 [Nov. 29, 1957], No. 37367/57. Class 56. An optical glass contains in weight per cent. GeO 2 20 to 50 ; La 2 O 3 30 to 50 ; BaO 0 to 15 ; B 2 O 3 0 to 10 ; Ta 2 O 5 0 to 30 and Nb 2 O 5 0 to 30. In addition up to 20% of oxides of one or more of the following may be added : Li, Na, K, Mg, Ca, Sr, Zn, Cd, Si, Ti, Zr, Th, Pb, Al, As and Sb, preferably not more than 5 %. Specific examples are given. The glasses have refractive indices Nd of from 1À80 to 1À94 and V-value-of from 32 to 43.
GB3736757A 1957-11-29 1957-11-29 Improvements in or relating to optical glass Expired GB860121A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3736757A GB860121A (en) 1957-11-29 1957-11-29 Improvements in or relating to optical glass
DEP21770A DE1263998B (en) 1957-11-29 1958-11-24 Glass, in particular as a material for optical components
FR1208923D FR1208923A (en) 1957-11-29 1958-11-27 Improvements to optical glasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3736757A GB860121A (en) 1957-11-29 1957-11-29 Improvements in or relating to optical glass

Publications (1)

Publication Number Publication Date
GB860121A true GB860121A (en) 1961-02-01

Family

ID=10395917

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3736757A Expired GB860121A (en) 1957-11-29 1957-11-29 Improvements in or relating to optical glass

Country Status (3)

Country Link
DE (1) DE1263998B (en)
FR (1) FR1208923A (en)
GB (1) GB860121A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691599A (en) * 1950-11-14 1954-10-12 Univ Ohio State Res Found Glasses
US2701208A (en) * 1950-11-14 1955-02-01 Univ Ohio State Res Found Glasses

Also Published As

Publication number Publication date
DE1263998B (en) 1968-03-21
FR1208923A (en) 1960-02-26

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