GB974438A - Improvements in or relating to optical glasses - Google Patents

Improvements in or relating to optical glasses

Info

Publication number
GB974438A
GB974438A GB20354/62A GB2035462A GB974438A GB 974438 A GB974438 A GB 974438A GB 20354/62 A GB20354/62 A GB 20354/62A GB 2035462 A GB2035462 A GB 2035462A GB 974438 A GB974438 A GB 974438A
Authority
GB
United Kingdom
Prior art keywords
relating
oxides
glass
optical glasses
cdo
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
GB20354/62A
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.)
Ernst Leitz Wetzlar GmbH
Original Assignee
Ernst Leitz Wetzlar GmbH
Ernst Leitz GmbH
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 Ernst Leitz Wetzlar GmbH, Ernst Leitz GmbH filed Critical Ernst Leitz Wetzlar GmbH
Publication of GB974438A publication Critical patent/GB974438A/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
    • C03C3/04—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
    • C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc

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

An optical flint glass is smelted from a mix comprising in percentages by weight of glass forming oxides 26 to 33 of which SiO2 is 12 to 20; B2O3 8 to 20; alkaline earth oxides 14 to 46 of which MgO is 0 to 5; CaO 0 to 23; SrO 0 to 10; BaO 10 to 24; more than 6.5 of CdO and/or ZnO of which ZnO is 5 to 20 and CdO 0 to 7.5; ZrO2 4 to 7.5; TiO2 6 to 25, the balance, if any, consisting of other compatible constituents. The glass may also contain up to 5% of oxides of Li, Na, K and/or Cs and up to 20% of La2O3. A number of examples are given.
GB20354/62A 1961-06-29 1962-05-28 Improvements in or relating to optical glasses Expired GB974438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1961L0039386 DE1260712B (en) 1961-06-29 1961-06-29 Glass, especially as a material for optical elements

Publications (1)

Publication Number Publication Date
GB974438A true GB974438A (en) 1964-11-04

Family

ID=7268630

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20354/62A Expired GB974438A (en) 1961-06-29 1962-05-28 Improvements in or relating to optical glasses

Country Status (3)

Country Link
DD (1) DD43144A (en)
DE (1) DE1260712B (en)
GB (1) GB974438A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513004A (en) * 1966-04-11 1970-05-19 Owens Illinois Inc La2o3-tio2-ta2o5-zro2-bao-b2o3-sio2 optical glass

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824891B2 (en) 1978-06-07 1980-07-17 Jenaer Glaswerk Schott & Gen., 6500 Mainz High refractive ophthalmic lenses of the SiO2 -B2 O3 system - TiO2 -La2 O3 -Earth alkaline oxides with low
DE2824982C3 (en) 1978-06-07 1981-04-30 Jenaer Glaswerk Schott & Gen., 6500 Mainz High refractive optical glasses of the system SiO ↓ 2 ↓ -B ↓ 2 ↓ O ↓ 3 ↓ -TiO ↓ 2 ↓ - ZrO ↓ 2 ↓ -BaO-Nb ↓ 2 ↓ O ↓ 5 ↓ -Li ↓ 2 ↓ O with a low density of s = 3.4 - 3.7 for long-range and near-vision lenses with refractive indices n ↓ D ↓ = 1.79 - 1.81 and dispersions v ↓ D ↓ = 31 - 29
US4252567A (en) 1979-09-07 1981-02-24 Nippon Kogaku K.K. Glasses for eyeglass lenses

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2584974A (en) * 1948-05-13 1952-02-12 Corning Glass Works Optical glass
CH285073A (en) * 1949-08-08 1952-08-31 Jenaer Glaswerk Schott & Gen Optical glass.
DE812455C (en) * 1949-09-08 1951-08-30 Jenaer Glaswerk Schott & Gen Optical glass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513004A (en) * 1966-04-11 1970-05-19 Owens Illinois Inc La2o3-tio2-ta2o5-zro2-bao-b2o3-sio2 optical glass

Also Published As

Publication number Publication date
DD43144A (en)
DE1260712B (en) 1968-02-08

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