FR2427309A2 - Verre d'indice de refraction eleve et de faible densite - Google Patents

Verre d'indice de refraction eleve et de faible densite

Info

Publication number
FR2427309A2
FR2427309A2 FR7816433A FR7816433A FR2427309A2 FR 2427309 A2 FR2427309 A2 FR 2427309A2 FR 7816433 A FR7816433 A FR 7816433A FR 7816433 A FR7816433 A FR 7816433A FR 2427309 A2 FR2427309 A2 FR 2427309A2
Authority
FR
France
Prior art keywords
refractive index
titania
silica
alkaline earth
low density
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.)
Granted
Application number
FR7816433A
Other languages
English (en)
Other versions
FR2427309B2 (fr
Inventor
Henri Meyer
Jean Emile Boulot
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.)
Corning Glass Works
Original Assignee
Corning Glass Works
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 Corning Glass Works filed Critical Corning Glass Works
Priority to FR7816433A priority Critical patent/FR2427309A2/fr
Priority to DE2828791A priority patent/DE2828791C2/de
Priority to JP7881178A priority patent/JPS5416524A/ja
Priority to NLAANVRAGE7807125,A priority patent/NL187063C/xx
Priority to IT68558/78A priority patent/IT1111419B/it
Priority to GB7828625A priority patent/GB2000492B/en
Priority to US05/941,549 priority patent/US4149895A/en
Publication of FR2427309A2 publication Critical patent/FR2427309A2/fr
Application granted granted Critical
Publication of FR2427309B2 publication Critical patent/FR2427309B2/fr
Granted 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
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
    • C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
    • C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
    • 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
    • C03C4/00—Compositions for glass with special properties
    • C03C4/20—Compositions for glass with special properties for chemical resistant glass

Abstract

L'invention se rapporte à l'industrie verrière. Elle concerne un verre ayant un indice de réfraction compris dans la gamme de 1,675 à 1,720, une densité comprise dans la gamme de 3,1 à 3,4, un nombre d'Abbe compris dans la gamme de 33 à 36,5 et une très bonne résistance chimique comme attestée par une perte de poids en bain acide inférieure à 0,010 mg/cm**2 comme mesurée au test AO, caractérisé en ce qu'il présente à sa température de liquidus une viscosité d'au moins 220 poises environ, et la composition suivant en poids : SiO2 40-46; Al2 O3 : 0-3; avec SiO2 + Al 2 O3 : 40-46 ; TiO2 : 13-17; ZrO2 : 4-11; MgO : 0-2; CaO : 3-7; BaO : 8-16; SrO : 0-4; avec CaO + MgO : 4-8; avec CaO + BaO + SrO : 15-25 ; Nb2 O5 : 2-10; Li2 O : 0-3; Na2 O : 2-7; K2 O : 3-8; avec Li2 O + Na2 O + K2 O : 5-12. Utilisation notamment en lunetterie.
FR7816433A 1977-07-01 1978-06-01 Verre d'indice de refraction eleve et de faible densite Granted FR2427309A2 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7816433A FR2427309A2 (fr) 1978-06-01 1978-06-01 Verre d'indice de refraction eleve et de faible densite
DE2828791A DE2828791C2 (de) 1977-07-01 1978-06-30 Glas im System SiO↓2↓-TiO↓2↓-ZrO↓2↓-CaO-BaO-Nb↓2↓O↓5↓-Alkalioxid (-Al↓2↓O↓3↓-MgO-SrO) mit einem hohen Brechungsindex und einer geringen Dichte
JP7881178A JPS5416524A (en) 1977-07-01 1978-06-30 Glass with high refractive index and low density
NLAANVRAGE7807125,A NL187063C (nl) 1977-07-01 1978-06-30 Glas voor optische toepassingen met een zeer goede chemische bestandheid.
IT68558/78A IT1111419B (it) 1977-07-01 1978-07-03 Vetro ad elevato indice di rifrazione e bassa densita
GB7828625A GB2000492B (en) 1977-07-01 1978-07-03 High refractive index low density glass
US05/941,549 US4149895A (en) 1977-07-01 1978-09-11 Glass with high refractive index and low density

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7816433A FR2427309A2 (fr) 1978-06-01 1978-06-01 Verre d'indice de refraction eleve et de faible densite

Publications (2)

Publication Number Publication Date
FR2427309A2 true FR2427309A2 (fr) 1979-12-28
FR2427309B2 FR2427309B2 (fr) 1983-10-21

Family

ID=9208959

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7816433A Granted FR2427309A2 (fr) 1977-07-01 1978-06-01 Verre d'indice de refraction eleve et de faible densite

Country Status (1)

Country Link
FR (1) FR2427309A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2847894A1 (fr) * 2002-12-03 2004-06-04 Schott Glas Verres optiques avec tg < 500°c, de preference sans pb et as

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2208853A1 (fr) * 1972-12-02 1974-06-28 Jenaer Glaswerk Schott & Gen
FR2313328A1 (fr) * 1975-06-02 1976-12-31 Hoya Glass Works Ltd Compositions de verres pour verres de lunetterie
FR2320031A7 (fr) * 1975-07-31 1977-02-25 Sovirel Verre a indice eleve et poids specifique faible
FR2334640A1 (fr) * 1975-12-10 1977-07-08 Hoya Corp Verre pour lentilles de contact
FR2354976A1 (fr) * 1976-06-14 1978-01-13 Leitz Ernst Gmbh Verres optiques flints a faible densite

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2208853A1 (fr) * 1972-12-02 1974-06-28 Jenaer Glaswerk Schott & Gen
FR2313328A1 (fr) * 1975-06-02 1976-12-31 Hoya Glass Works Ltd Compositions de verres pour verres de lunetterie
FR2320031A7 (fr) * 1975-07-31 1977-02-25 Sovirel Verre a indice eleve et poids specifique faible
FR2334640A1 (fr) * 1975-12-10 1977-07-08 Hoya Corp Verre pour lentilles de contact
FR2354976A1 (fr) * 1976-06-14 1978-01-13 Leitz Ernst Gmbh Verres optiques flints a faible densite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2847894A1 (fr) * 2002-12-03 2004-06-04 Schott Glas Verres optiques avec tg < 500°c, de preference sans pb et as
NL1024931C2 (nl) * 2002-12-03 2005-06-21 Schott Glas Optisch glas met Tg < 500 dat bij voorkeur Pb-vrij en As-vrij is.

Also Published As

Publication number Publication date
FR2427309B2 (fr) 1983-10-21

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