FR2354976A1 - Optical flint glass compsn. - gives light weight, low dispersion, high index of refraction and no crystallisation tendency - Google Patents

Optical flint glass compsn. - gives light weight, low dispersion, high index of refraction and no crystallisation tendency

Info

Publication number
FR2354976A1
FR2354976A1 FR7715744A FR7715744A FR2354976A1 FR 2354976 A1 FR2354976 A1 FR 2354976A1 FR 7715744 A FR7715744 A FR 7715744A FR 7715744 A FR7715744 A FR 7715744A FR 2354976 A1 FR2354976 A1 FR 2354976A1
Authority
FR
France
Prior art keywords
refraction
light weight
high index
low dispersion
flint glass
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.)
Withdrawn
Application number
FR7715744A
Other languages
French (fr)
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
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 filed Critical Ernst Leitz Wetzlar GmbH
Publication of FR2354976A1 publication Critical patent/FR2354976A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
    • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
    • C03C3/093—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium containing zinc or zirconium

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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Glass Compositions (AREA)

Abstract

Low-density =3.2 g./cm.3) optical flint glasses (1.68 = ne =1.71; Abbe number 37 = Ve =41) contains (in wt.%) SiO2 40.0-45.0, B2O3 2.5-5.0, Li2O 1.0-5.0, Na2O3.0-8.0, CaCO 16.0-26.0, SrO 0-5.0, ZnO 1.0-10.5, TiO2 9.0-13.0, ZrO2 6.0-9.0, and Nb2O5 2.5-3.0. Li2O and/or Na2O can be replaced by K2O to 3 wt.%. The glass can be stabilised by addition of MgO and/or Al2O3 in an amt. is not >3 wt.%. The relatively high content of CaO and the absence of BaO results in a low density; this is of considerable advantage in some applications, e.g. spectacles. The low TiO2 content reduces the dispersion. There is no tendency to crystallisation.
FR7715744A 1976-06-14 1977-05-23 Optical flint glass compsn. - gives light weight, low dispersion, high index of refraction and no crystallisation tendency Withdrawn FR2354976A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762626541 DE2626541A1 (en) 1976-06-14 1976-06-14 LOW DENSITY OPTICAL FLINT GLASS

Publications (1)

Publication Number Publication Date
FR2354976A1 true FR2354976A1 (en) 1978-01-13

Family

ID=5980469

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7715744A Withdrawn FR2354976A1 (en) 1976-06-14 1977-05-23 Optical flint glass compsn. - gives light weight, low dispersion, high index of refraction and no crystallisation tendency

Country Status (3)

Country Link
JP (1) JPS52152911A (en)
DE (1) DE2626541A1 (en)
FR (1) FR2354976A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427309A2 (en) * 1978-06-01 1979-12-28 Corning Glass Works High refractive index low density glass - based on silica, titania and alkali metal and alkaline earth metal oxide(s)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105859131B (en) * 2016-06-21 2019-04-02 成都光明光电股份有限公司 Crown optical glass
JP2022102298A (en) 2020-12-25 2022-07-07 株式会社クボタ Exhaust gas diffusion device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427309A2 (en) * 1978-06-01 1979-12-28 Corning Glass Works High refractive index low density glass - based on silica, titania and alkali metal and alkaline earth metal oxide(s)

Also Published As

Publication number Publication date
JPS52152911A (en) 1977-12-19
DE2626541A1 (en) 1977-12-15

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Legal Events

Date Code Title Description
ST Notification of lapse