GB615286A - New or improved optical glasses - Google Patents

New or improved optical glasses

Info

Publication number
GB615286A
GB615286A GB2318246A GB2318246A GB615286A GB 615286 A GB615286 A GB 615286A GB 2318246 A GB2318246 A GB 2318246A GB 2318246 A GB2318246 A GB 2318246A GB 615286 A GB615286 A GB 615286A
Authority
GB
United Kingdom
Prior art keywords
per cent
tho
group
refractive index
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
GB2318246A
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Priority to GB2318246A priority Critical patent/GB615286A/en
Publication of GB615286A publication Critical patent/GB615286A/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
    • 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

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

615,286. Optical glasses. KODAK, Ltd. (Eastman Kodak Co., and DePaolis, P. F.). Aug. 3, 1946, No. 23182. 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 1.65-1.69, and dispersive index 50-57, with more than 35 per cent of B 2 O 3' more than 10 per cent of ThO 2 , more than 10 per cent of La 2 O 3 , more than 20 per cent of one or more of BaO, CaO, MgO. Group 2. Refractive index 1.62-1.70, and dispersive index 53.9-60, with 40-55 per cent of B 2 O 3' and Al 2 O 3 and/or BeO, at least 25 per cent of La 2 O 3 and ThO 2 , BaO and/or SrO, and not over 3 per cent of Li 2 O, or consisting of 40-55 per cent of B 2 O 3 with at least one of Al 2 O 3 , BeO, SrO 2 , the B 2 O 3 being at least 35 per cent, 30-45 per cent of La 2 O 3 and ThO 2 with at least 19 per cent La 2 O 3 and 5 per cent ThO 2 , and 13-25 per cent of the oxides of duralent metals. Group 3. Refractive index approximately 1.75, and dispersive index approximately 44, with 25-33 per cent of La 2 O 3 , 15-20 per cent of WO 3 , 10-15 per cent ThO 2 , 25-30 per cent B 2 O 3 , and 10-15 per cent of at least one of CaO, ZnO, SnO 2 . Several examples are given.
GB2318246A 1946-08-03 1946-08-03 New or improved optical glasses Expired GB615286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2318246A GB615286A (en) 1946-08-03 1946-08-03 New or improved optical glasses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2318246A GB615286A (en) 1946-08-03 1946-08-03 New or improved optical glasses

Publications (1)

Publication Number Publication Date
GB615286A true GB615286A (en) 1949-01-04

Family

ID=10191483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2318246A Expired GB615286A (en) 1946-08-03 1946-08-03 New or improved optical glasses

Country Status (1)

Country Link
GB (1) GB615286A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2971854A (en) * 1957-05-23 1961-02-14 Jenaer Glaswerk Schott & Gen Optical glass
US3074805A (en) * 1958-01-25 1963-01-22 Jenaer Glaswerk Schott & Gen Optical 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
US2971854A (en) * 1957-05-23 1961-02-14 Jenaer Glaswerk Schott & Gen Optical glass
US3082101A (en) * 1957-11-16 1963-03-19 Jenaer Glaswerk Schott & Gen Optical glass
US3074805A (en) * 1958-01-25 1963-01-22 Jenaer Glaswerk Schott & Gen Optical glass

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