GB1255497A - Glass compositions - Google Patents

Glass compositions

Info

Publication number
GB1255497A
GB1255497A GB2526768A GB2526768A GB1255497A GB 1255497 A GB1255497 A GB 1255497A GB 2526768 A GB2526768 A GB 2526768A GB 2526768 A GB2526768 A GB 2526768A GB 1255497 A GB1255497 A GB 1255497A
Authority
GB
United Kingdom
Prior art keywords
glass compositions
optical glass
glass
higham
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
GB2526768A
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 GB2526768A priority Critical patent/GB1255497A/en
Priority to NL6907991A priority patent/NL6907991A/xx
Priority to DE19691926959 priority patent/DE1926959B2/en
Priority to FR6916938A priority patent/FR2009390A1/fr
Publication of GB1255497A publication Critical patent/GB1255497A/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
    • C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
    • C03C3/068—Glass compositions containing silica with less than 40% silica by weight containing boron containing rare earths

Abstract

1,255,497. Optical glass. PILKINGTON BROS. Ltd., R. J. PARRY, and G.. A. HIGHAM. 21 May, 1969 [27 May, 1968], No. 25267/68. Heading C1M. An optical glass contains, in weight per cent : the balance, if any, consisting of other compatible constituents. The glass, which may optionally contain 0-5 Nb 2 O 5 and/or 0-10 Y 2 O 3 , has a refractive index of about 1À900, and a " V value " of about 40À0.
GB2526768A 1968-05-27 1968-05-27 Glass compositions Expired GB1255497A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2526768A GB1255497A (en) 1968-05-27 1968-05-27 Glass compositions
NL6907991A NL6907991A (en) 1968-05-27 1969-05-23
DE19691926959 DE1926959B2 (en) 1968-05-27 1969-05-23 Lead and thorium-free optical glass that is stable against devitrification and has a high refractive index of around 1.900 and a relatively low dispersion of around 40 based on lanthanum tantalum oxide
FR6916938A FR2009390A1 (en) 1968-05-27 1969-05-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2526768A GB1255497A (en) 1968-05-27 1968-05-27 Glass compositions

Publications (1)

Publication Number Publication Date
GB1255497A true GB1255497A (en) 1971-12-01

Family

ID=10224940

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2526768A Expired GB1255497A (en) 1968-05-27 1968-05-27 Glass compositions

Country Status (4)

Country Link
DE (1) DE1926959B2 (en)
FR (1) FR2009390A1 (en)
GB (1) GB1255497A (en)
NL (1) NL6907991A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5263920A (en) * 1975-11-25 1977-05-26 Nippon Chemical Ind Optical glass
DE3130039C2 (en) * 1981-07-30 1984-07-12 Schott Glaswerke, 6500 Mainz CdO-ThO? 2? -Free, high refractive index optical glass with the optical position nd = 1.85 - 2.05 and vd 25-43
DE9111121U1 (en) * 1991-09-07 1991-10-24 Hassomat Maschb Gmbh & Co Kg
JP3750984B2 (en) 2000-05-31 2006-03-01 Ｈｏｙａ株式会社 Optical glass and optical product manufacturing method

Also Published As

Publication number Publication date
DE1926959B2 (en) 1971-04-01
FR2009390A1 (en) 1970-02-06
DE1926959A1 (en) 1969-12-04
NL6907991A (en) 1969-12-01

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