GB608298A - New or improved optical glasses - Google Patents

New or improved optical glasses

Info

Publication number
GB608298A
GB608298A GB2318346A GB2318346A GB608298A GB 608298 A GB608298 A GB 608298A GB 2318346 A GB2318346 A GB 2318346A GB 2318346 A GB2318346 A GB 2318346A GB 608298 A GB608298 A GB 608298A
Authority
GB
United Kingdom
Prior art keywords
per cent
tho
group
refractive index
index
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
GB2318346A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to GB2318346A priority Critical patent/GB608298A/en
Publication of GB608298A publication Critical patent/GB608298A/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
    • 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
    • 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

608,298. Optical glass. KODAK, Ltd. (Eastman Kodak Co., and Paolis, P. F. de). Aug. 3, 1946, No. 23183. Addition to 462,304. [Class 56] The invention of the parent Specification is modified to give three groups of glasses as follows: Group 1, refractive index approximately 1.71, and dispersive index approximately 53, with not more than 46 per cent of at least two of La 2 O 3' ThO 2 , Ta 2 O 5 , &c., not more than 40 per cent of one or more of B 2 O 3 , Al 2 O 3 , SiO 2 of which at least 30 per cent is B 2 O 3 , and at least 15 per cent of the oxides of one or more divalent metals of which BaO constitutes at least 7 per cent. Group 2, refractive index 1.75-1.80, and dispersive index 37-40, with 18-27 per cent of La 2 O 3 , 12-18 per cent of TiO 2 and/or MoO 3 , 12-18 per cent of ThO 2 , 15-27 per cent of one or more of BaO, SrO, CaO, CdO, 20-30 per cent B 2 O 3 , and less than 3 per cent of Al 2 O 3 and/or BeO. Group 3, refractive index 1.80-1.82, and dispersive index 40-42, with less than 70 per cent of La 2 O 3 , Ta 2 O 5 , and ThO 2 and at least 5 per cent of each, 27-30 per cent of one or more of B 2 O 3 , Al 2 O 3 and SiO 2 of which B 2 O 3 comprises 22-24 per cent, and 2-15 per cent of one or more of WO 3 , ZrO 2 and TiO 2 . Several examples are given.
GB2318346A 1946-08-03 1946-08-03 New or improved optical glasses Expired GB608298A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2318346A GB608298A (en) 1946-08-03 1946-08-03 New or improved optical glasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2318346A GB608298A (en) 1946-08-03 1946-08-03 New or improved optical glasses

Publications (1)

Publication Number Publication Date
GB608298A true GB608298A (en) 1948-09-13

Family

ID=10191494

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2318346A Expired GB608298A (en) 1946-08-03 1946-08-03 New or improved optical glasses

Country Status (1)

Country Link
GB (1) GB608298A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704420A (en) * 1949-11-04 1955-03-22 Bausch & Lomb Process for making composite glass articles
US3081178A (en) * 1959-08-10 1963-03-12 Leitz Ernst Gmbh Optical borate glass
US3082101A (en) * 1957-11-16 1963-03-19 Jenaer Glaswerk Schott & Gen Optical glass

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704420A (en) * 1949-11-04 1955-03-22 Bausch & Lomb Process for making composite glass articles
US3082101A (en) * 1957-11-16 1963-03-19 Jenaer Glaswerk Schott & Gen Optical glass
US3081178A (en) * 1959-08-10 1963-03-12 Leitz Ernst Gmbh Optical borate glass

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