FR2510546A2 - LIGHTWEIGHT GLASS, OPTICALLY OPHTHALMIC, HAVING GOOD ACID AND HYDROLYSIS - Google Patents
LIGHTWEIGHT GLASS, OPTICALLY OPHTHALMIC, HAVING GOOD ACID AND HYDROLYSIS Download PDFInfo
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- FR2510546A2 FR2510546A2 FR8209484A FR8209484A FR2510546A2 FR 2510546 A2 FR2510546 A2 FR 2510546A2 FR 8209484 A FR8209484 A FR 8209484A FR 8209484 A FR8209484 A FR 8209484A FR 2510546 A2 FR2510546 A2 FR 2510546A2
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- weight
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- ophthalmic
- hydrolysis
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Classifications
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- 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
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead 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
- C03C3/062—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
-
- 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
-
- 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
- C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
- C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron
- C03C3/074—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron containing zinc
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- 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
L'INVENTION CONCERNE UN VERRE OPTIQUE AYANT UN INDICE DE REFRACTION SUPERIEUR OU EGAL A 1,69, UN NOMBRE D'ABBE SUPERIEUR OU EGAL A 38 ET UNE MASSE VOLUMIQUE INFERIEURE OU EGALE A 3,25GCM. CE VERRE, QUI CONSTITUE UN PERFECTIONNEMENT DE CELUI QUI EST DECRIT DANS LA DEMANDE DE BREVET PRINCIPAL, DIFFERE DE CELUI-CI EN CE QU'IL CONTIENT DE 0,5 A 4,0 EN POIDS DE PO POUR QUE SOIT AMELIOREE SON APTITUDE A ETRE FABRIQUE EN CUVE EN CONTINU ET QUE SOIT AUGMENTEE SA RESISTANCE AUX ACIDES, EN CE QUE LA SOMME SIOBOALOPO EST COMPRISE ENTRE 38,5 ET 41,5 EN POIDS ET EN CE QUE LA SOMME MGOCAO EST COMPRISE ENTRE 13 ET 17,5 EN POIDS. APPLICATION A LA FABRICATION DE VERRES A USAGE OPTIQUE ET OPHTALMIQUE.THE INVENTION CONCERNS AN OPTICAL GLASS HAVING A REFRACTION INDEX OF GREATER OR EQUAL TO 1.69, A NUMBER OF ABBES GREATER OR EQUAL TO 38 AND A DENSITY LESS THAN OR EQUAL TO 3.25GCM. THIS GLASS, WHICH CONSTITUTES AN IMPROVEMENT OF THAT DESCRIBED IN THE MAIN PATENT APPLICATION, DIFFERS FROM THIS GLASS IN THAT IT CONTAINS 0.5 TO 4.0 IN WEIGHT IN POINT SO THAT ITS IMPROVED ITS SUITABILITY FOR BEING MANUFACTURED IN CONTINUOUS TANKS AND THAT IS INCREASED ITS RESISTANCE TO ACIDS, IN THAT SIOBOALOPO SUM IS BETWEEN 38.5 AND 41.5 BY WEIGHT AND IN THAT MGOCAO SUM IS BETWEEN 13 AND 17.5 BY WEIGHT. APPLICATION TO THE MANUFACTURE OF GLASSES FOR OPTICAL AND OPHTHALMIC USE.
Description
1054610546
La présente invention concerne des verres optiques et The present invention relates to optical glasses and
ophtalmiques ayant une grande résistance aux acides, un indi- ophthalmic patients with high resistance to acids, an indi-
ce de réfraction nd de 1,69 à 1,71, un nombre d'Abbe supérieur à 38 et une densité (masse volumique) de 3,15 à 3,25 g/cm verres qui peuvent être fondus en continu dans une cuve de fusion, puis être moulés automatiquement par compression Les coefficients de dilatation a 20 -300 C de ces verres doivent it has a refractive index nd of 1.69 to 1.71, an Abbe number greater than 38 and a density (density) of 3.15 to 3.25 g / cm which can be continuously melted in a tank of fusion, then be automatically molded by compression The coefficients of expansion at 20 -300 C of these glasses must
être compris entre environ 80 10-7 et 97 10-7. be between about 10-7 and 97-10-7.
La demande de brevet principal 81 13608 décrit un verre optique et ophtalmique de faible densité, résistant The main patent application 81 13608 discloses an optical and ophthalmic lens of low density, resistant
aux acides et à l'hydrolyse, dans lequel la somme des vitri- acids and hydrolysis, in which the sum of the vitri-
fiants Si O 2 + B 203 + A 1203 + Ge O 2 est comprise entre 25 et 39 % en poids et qui peut également contenir P 205 à la place If O 2 + B 203 + A 1203 + Ge O 2 is between 25 and 39% by weight and may also contain P 205 instead
de Ge O 2.of Ge O 2.
Cela étant, les présents inventeurs ont trouvé que That being so, the present inventors have found that
l'aptitude du verre mentionné à être fabriqué en cuve encon- the ability of the mentioned glass to be manufactured in
tinu peut encore être améliorée si l'on supprime totalement Ge O 2, qu'on introduise P 205 comme constituant obligatoire et qu'on augmente la somme des vitrifiants Si O 2 + B 203 + tinu can be further improved by completely eliminating Ge O 2, introducing P 205 as a mandatory constituent and increasing the sum of vitrifiers Si O 2 + B 203 +
Al 203 + P 205 à une valeur de 38,5 à 41,5 % en poids. Al 203 + P 205 at a value of 38.5 to 41.5% by weight.
Dans ce nouveau verre les intervalles de quantités pour les autres constituants sont parfois beaucoup plus étroits que ceux qui ont été proposés dans la demande de In this new glass the quantity intervals for the other constituents are sometimes much narrower than those proposed in the application for
brevet principal.main patent.
Dans les deux cas il s'agit donc de verres borosili- In both cases, borosilicate glasses are
catés renfermant de 26 à 32,5 % en poids de Si O 2 et de 6 à 12 % en poids de B 203 Ces verres, on le sait, résistent categories containing from 26 to 32.5% by weight of Si O 2 and from 6 to 12% by weight of B 203 These glasses, as is known, are resistant
très bien à l'hydrolyse et aux attaques chimiques. very good at hydrolysis and chemical attack.
La présente invention a donc pour objet un verre à usage optique et ophtalmique qui a un nd supérieur à 1,69 un vd aumoins égal à 38, une masse volumique inférieure ou égale à 3,25 g/cm, un coefficient de dilatation a 20-3000 C compris entre 80 10-7 et 97 10-7 et une grande résistance aux acides, selon la demande de brevet principal, verre caractérisé en ce qu'il contient de 0,5 à 4,0 % en poids de P 205 pour que soit améliorée son aptitude à être fabriqué en cuve en continu et pour que soit encore am Mliorée sa résistance aux acides, la somme Si O 2 + B 203 + A 1203 + P 205 est comprise entre 38,5 et 41,5 % en poids et la somme The subject of the present invention is therefore an optical and ophthalmic lens which has a nd greater than 1.69, a vd at least equal to 38, a density of less than or equal to 3.25 g / cm, an expansion coefficient of 20. -3000 C between 80 10-7 and 97 10-7 and a high acid resistance, according to the main patent application, glass characterized in that it contains 0.5 to 4.0% by weight of P 205 in order to improve its ability to be continuously manufactured in the tank and to further improve its resistance to acids, the sum SiO 2 + B 203 + A 1203 + P 205 is between 38.5 and 41.5% in weight and sum
Mg O + Ca O est comprise entre 13 et 17,5 % en poids. Mg O + Ca O is between 13 and 17.5% by weight.
Voici des gammes de compositions plus étroites pour les verres conformes à l'invention: lère Gamme Si O de 26,0 à 32,5 % en poids B 203 de 6,0 à 12,0 % en poids A 1203 de O à 3,0 % en poids P 205 de 0,5 à 4,0 % en poids Li 20 de O à 5 % en poids Na 2 O de O à 6 % en poids K 2 de O 8 % en poids KO O de 0 à 8 % en poids Mg O Ca O avec Mg O + Ca O = Sr O Ba O Zn O Pb O avec Sr O + Ba O + et Mg O + Ca O + La 203 Zr O 2 avec La 203 + Zr O 2 Ti O 2 Nb 205 Na 20 + K 20 = de 4,5 à 12,0 % en poids de O à 8 de 9 à 16 de 13 à 17,5 % el de O à 6 de O à 5 de 0 à 7 de O à 4 Zn O + Pb O = de 0 Here are ranges of narrower compositions for the glasses according to the invention: 1st range Si O from 26.0 to 32.5% by weight B 203 from 6.0 to 12.0% by weight A 1203 from 0 to 3 , 0% by weight P 205 from 0.5 to 4.0% by weight Li 20 from 0 to 5% by weight Na 2 O from 0 to 6% by weight K 2 from O 8% by weight KO 0 from 0 to 8% by weight Mg O Ca O with Mg O + Ca O = Sr O Ba O Zn O Pb O with Sr O + Ba O + and Mg O + Ca O + La 203 Zr O 2 with La 203 + Zr O 2 Ti O 2 Nb 205 Na 20 + K 20 = from 4.5 to 12.0 wt.% O to 8 from 9 to 16 from 13 to 17.5% and from 0 to 6 from 0 to 5 from 0 to 7 from O to 4 Zn O + Pb O = 0
Sr O + Ba O + Zn O -Sr O + Ba O + Zn O -
de 6 à 11 de 5 à 8 = de 13,5 à 17 de 5 à 9 de 6 à 11 de O à 4 % en poids % en poids poids à 7 + Pb C C % % %o en poids en poids en poids en poids % en poids ) = de 17 à en poids en poids en poids en poids en poids en poids avec Ti O 2 + Nb 205 + WO 3 =de 14 à 18 % en poids La 203 + Zr O 2 + Ti O + Nb 205 + WO = de 28 à 33 % et Zr O2 + 2 25 3 et Zr O 2 + Ti O 2 + Nb 2 05 = de 20 à 26 %en poids 24 % en poids en poids 2 ème Gamme Sio 2 B 203 P 205 from 6 to 11 from 5 to 8 = from 13.5 to 17 from 5 to 9 from 6 to 11 from 0 to 4% by weight% by weight by weight at 7 + Pb CC% by weight% by weight weight% by weight) = from 17 to by weight by weight, by weight, by weight, by weight, with Ti O 2 + Nb 205 + WO 3 = from 14 to 18% by weight La 203 + Zr O 2 + Ti O + Nb 205 + WO = from 28 to 33% and Zr O2 + 2 25 3 and Zr O 2 + Ti O 2 + Nb 2 O 5 = from 20 to 26% by weight 24% by weight by weight 2nd Sio range 2 B 203 P 205
A 1203A 1203
Li 20 de de de de deLi de 20 de de
29 à 3229 to 32
7,5 à 107.5 to 10
0,5 à 2,50.5 to 2.5
0 à 30 to 3
0,5 à 40.5 to 4
% en poids % en poids % en poids % en poids % en poids avec Li 20 + a Na 2 O de 1,5 à 3,5 % en poids K 20 de 2,5 à 7 % en poids avec Li 2 O + Na 20 + K 20 = de 6 à 10 % en poids Mg O de 1,0 à 5,0 % en poids Ca O de 10, 0 à 13,5 % en poids avec Mg O + Ca O = de 13 à 17 % en poids Sr O de O à 5 % en poids Zn O de O à 7 % en poids Ba O de O à 5 % en poids Pb O de O à 4 % en poids avec Sr O + Zn O + Ba O + Pb O = de O à 7 % en poids et Mg O + Ca O + Sr O + Zn O + Ba O + Pb O = de 16 à 22 % en poids La 203 de 6 à 11 % en poids Zr O 2 de 5 à 8 % en poids avec La 203 + Zr O 2 de 13,5 à 17,5 % en poids Ti O 2 de 5 à 9 % en poids Nb 205 de 6 à 11 % en poids avec Ti O 2 + Nb 205 = de 15 à 17 % en poids La 203 + Zr O 2 + Ti O 2 + Nb 205 = de 28 à 33 % en poids % by weight% by weight% by weight% by weight% by weight with Li 20 + to Na 2 O from 1.5 to 3.5% by weight K from 2.5 to 7% by weight with Li 2 O + Na 20 + K 20 = from 6 to 10% by weight MgO from 1.0 to 5.0% by weight CaO from 10.0 to 13.5% by weight with Mg O + Ca O = from 13 to 17 % by weight Sr O from 0 to 5% by weight Zn O from 0 to 7% by weight Ba O from 0 to 5% by weight Pb O from 0 to 4% by weight with Sr O + Zn O + Ba O + Pb O = from 0 to 7% by weight and Mg O + Ca O + Sr O + Zn O + Ba O + Pb O = from 16 to 22% by weight The 203 from 6 to 11% by weight Zr O 2 from 5 to 8% by weight with La 203 + Zr O 2 from 13.5 to 17.5% by weight Ti O 2 from 5 to 9% by weight Nb 205 from 6 to 11% by weight with Ti O 2 + Nb 205 = from 15 to 17% by weight 203 + Zr O 2 + Ti O 2 + Nb 205 = 28 to 33% by weight
et Zr O 2 + Ti O 2 + Nb 205 = de 21 à 25 % enpoids. and Zr O 2 + Ti O 2 + Nb 205 = from 21 to 25% by weight.
21 2 25 %enpis21 2 25% stuck
On apprécie tout particulièrement la gamme de compo- We particularly appreciate the range of compo-
sition suivante: Si O 2 de 30,5 à 31,5 % en poids B 203 de 8,0 à 9,0 % en poids Li 20 de 1,0 à 2,0 % en poids Na 20 de 2,0 à 4,0 % en poids K 2 O de 3,0 à 5,0 % en poids Mg O de 2,0 à 4,0 % en poids Ca O de 11,0 à 13,0 % en poids La 203 de 8,5 à 9,5 % en poids Zr O 2 de 6,5 à 8,0 % en poids Ti O 2 de 7,0 à 9,0 % en poids Nb 205 de 7,0 à 9,0 % en poids Sr O de 2,0 à 4,0 % en poids following: If O 2 from 30.5 to 31.5% by weight B 203 from 8.0 to 9.0% by weight Li from 1.0 to 2.0% by weight Na 20 from 2.0 to 4.0% by weight K 2 O from 3.0 to 5.0% by weight Mg O from 2.0 to 4.0% by weight Ca O from 11.0 to 13.0% by weight The 203 of 8 5 to 9.5% by weight Zr O 2 from 6.5 to 8.0% by weight Ti O 2 from 7.0 to 9.0% by weight Nb 205 from 7.0 to 9.0% by weight Sr 0 from 2.0 to 4.0% by weight
P 205 de 1,0 à 2,0 % en poids.P 205 from 1.0 to 2.0% by weight.
On préfère, pour les verres conformes à l'invention, la gamme de composition suivante: Sio 2 B 203 Li 20 Na 20 K 20 Mg O Ca O La 203 Zr O 2 Ti O 2 Nb 205 P 205 Zn O de 29,0 à de 8,0 à de de de de de de de de de de de 2,0 à 2,0 à 3,0 à 3,0 à ,0 à 7,0 à 7,0 à 6,0 à 9,0 à 1,0 à 3,0 à On a rassemblé quatre bleau suivant: ,5 % en poids ,0 % en poids 4,0 % en poids 4,0 % en poids ,0 % en poids ,0 % en poids 12,0 % en poids 8,5 % en poids 8,0 % en poids 8,0 % en poids 11,0 % en poids 2,0 % en poids ,0 % en poids. For the glasses in accordance with the invention, the following composition range is preferred: Sio 2 B 203 Li 20 Na 20 K 20 Mg O Ca O La 203 Zr O 2 Ti O 2 Nb 205 P 205 Zn O 29.0 at from 8.0 to 2.0 to 2.0 at 3.0 to 3.0 at 0.0 to 7.0 at 6.0 to 6.0, From 0 to 1.0 to 3.0 to 4 parts by weight were collected: 5% by weight, 0% by weight 4.0% by weight 4.0% by weight, 0% by weight, 0% by weight 12 0% by weight 8.5% by weight 8.0% by weight 8.0% by weight 11.0% by weight 2.0% by weight, 0% by weight.
exemples de verres dans le ta-examples of glasses in the
Exemple 1 2 3 4 Si O 2315 31,560 31,50 29,74 Example 1 2 3 4 If O 2315 31.560 31.50 29.74
B 203 8,83 8,50 8,73 9,27B 203 8.83 8.50 8.73 9.27
B 203 Li 2 O 1,10 1,09 3,00 Na 20 2,74 2,65 2,71 2,18 B 203 Li 2 O 1.10 1.09 3.00 Na 20 2.74 2.65 2.71 2.18
K 20 4,15 4,00 4,10 3,30K 20 4.15 4.00 4.10 3.30
Mg O 2,97 4,00 1,96 4,05 Ca O 12,39 11,30 12,25 10,43 La 203 8,93 7,65 9, 49 7,37 Zr O 2 7,56 7,30 7,47 7,74 Ti O 2 8,04 6,50 7,47 6,33 Nb 2 5 7,50 9,10 7,74 10,70 Mg O 2.97 4.00 1.96 4.05 Ca O 12.39 11.30 12.25 10.43 The 203 8.93 7.65 9, 49 7.37 Zr O 2 7.56 7, 30 7.47 7.74 Ti O 2 8.04 6.50 7.47 6.33 Nb 2 5 7.50 9.10 7.74 10.70
P 205 1,10 0,85 0,71 1,80P 205 1.10 0.85 0.71 1.80
Sr O 3,56 3,65 4,78 -Sr O 3.56 3.65 4.78 -
Zn O 2,90 4,09 nd 1,70117 1,69291 1,69821 1,70407 d 39,37 39,69 39,73 39, 36 Zn O 2.90 4.09 n / a 1.70117 1.69291 1.69821 1.70407 d 39.37 39.69 39.73 39.36
6 3,20 3,22 3,23 3,196 3.20 3.22 3.23 3.19
RA( 1) 2 2 2 2RA (1) 2 2 2 2
Cristal 5 ( 2)Crystal 5 (2)
TSDV /1040 /1010 /965 /975TSDV / 1040/1010/965/975
VC Cmax /T 2,1/935 1,3/930 1,7/885 2,6/870 r _ VC Cmax / T 2.1 / 935 1.3 / 930 1.7 / 885 2.6 / 870 r _
( 1) Détermination de la résistance aux acides (RA) par la mé- (1) Determination of acid resistance (RA) by the
thode décrite dans le catalogue de Schott 311 d ( 1980) "Optisches Glas" ( 2) Essai à la tôle support décrit par Grauer, O H & Hamilton E.H dans J Research NBS 44, 495 ( 1950) = 5 minutes de recuit TSDV = température supérieure de dévitrification VCC ax/T = vitesse de croissance cristalline maximale The method described in Schott's catalog 311 (1980) "Optisches Glas" (2) Support plate test described by Grauer, OH & Hamilton EH in J Research NBS 44, 495 (1950) = 5 minutes of annealing TSDV = temperature upper devitrification VCC ax / T = maximum crystal growth rate
en pm/minute à la température correspon- in pm / min at the corresponding temperature
dante.dante.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3121824A DE3121824C2 (en) | 1981-06-02 | 1981-06-02 | Acid-resistant, hydrolytically stable optical and ophthalmic glass of low density |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2510546A2 true FR2510546A2 (en) | 1983-02-04 |
FR2510546B2 FR2510546B2 (en) | 1985-10-25 |
Family
ID=6133724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8209484A Expired FR2510546B2 (en) | 1981-06-02 | 1982-06-01 | LIGHT GLASS, FOR OPTICAL AND OPHTHALMIC USE, HAVING GOOD RESISTANCE TO ACIDS AND HYDROLYSIS |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS57200249A (en) |
BR (1) | BR8203146A (en) |
DE (1) | DE3121824C2 (en) |
ES (1) | ES512714A0 (en) |
FR (1) | FR2510546B2 (en) |
GB (1) | GB2099417B (en) |
IT (1) | IT1157016B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2793240A1 (en) * | 1999-05-06 | 2000-11-10 | Schott Glas | OPTICAL LENSES WITHOUT LEAD |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6021828A (en) * | 1983-07-14 | 1985-02-04 | Hoya Corp | Glass for spectacle lens |
DE4101365C1 (en) * | 1991-01-18 | 1992-04-16 | Schott Glaswerke, 6500 Mainz, De | |
JP3302892B2 (en) * | 1996-10-23 | 2002-07-15 | 株式会社オハラ | Optical glass |
FR2762837B1 (en) * | 1997-04-30 | 1999-07-16 | Corning Sa | HIGH REFRACTION INDEX GLASSES, MULTIFOCAL CORRECTIVE LENSES INCORPORATING THE SAME |
WO1998049110A1 (en) | 1997-04-30 | 1998-11-05 | Corning Incorporated | High refractive index glasses, multifocal corrective lenses containing same |
FR2804676B1 (en) * | 2000-02-04 | 2002-05-03 | Corning Sa | VERY HIGH REFRACTION INDEX GLASSES, MULTIFOCAL CORRECTIVE LENSES INCORPORATING THEM |
JP2004519402A (en) * | 2001-03-13 | 2004-07-02 | コーニング インコーポレイテッド | Ophthalmic segment glass with high nD |
CN102674685B (en) * | 2012-04-23 | 2014-08-27 | 湖北新华光信息材料有限公司 | Optical glass |
WO2016093211A1 (en) * | 2014-12-11 | 2016-06-16 | 日本電気硝子株式会社 | Glass composition for wound healing, wound covering material, and method for producing same |
US11591253B2 (en) | 2018-11-29 | 2023-02-28 | Corning Incorporated | High refractive index silicate glass compositions with reduced devitrification kinetics |
CN109851217B (en) * | 2018-12-07 | 2022-03-08 | 成都光明光电股份有限公司 | Heavy lanthanum flint glass and prefabricated member, optical element and optical instrument thereof |
EP4201898A1 (en) * | 2021-12-21 | 2023-06-28 | Schott Ag | Glass composition, glass article and method of making it |
CN116081942B (en) * | 2023-02-08 | 2023-10-13 | 中建材光子科技有限公司 | High-transmittance environment-friendly optical fiber core glass and preparation method thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2313328A1 (en) * | 1975-06-02 | 1976-12-31 | Hoya Glass Works Ltd | GLASS COMPOSITIONS FOR EYEWEAR GLASSES |
FR2334640A1 (en) * | 1975-12-10 | 1977-07-08 | Hoya Corp | CONTACT LENS GLASS |
FR2486516A1 (en) * | 1980-07-14 | 1982-01-15 | Jenaer Glaswerk Schott & Gen | LIGHTWEIGHT GLASS, OPTICALLY OPHTHALMIC, HAVING GOOD ACID AND HYDROLYSIS |
-
1981
- 1981-06-02 DE DE3121824A patent/DE3121824C2/en not_active Expired
-
1982
- 1982-05-11 JP JP57077640A patent/JPS57200249A/en active Granted
- 1982-05-28 BR BR8203146A patent/BR8203146A/en not_active IP Right Cessation
- 1982-05-31 ES ES512714A patent/ES512714A0/en active Granted
- 1982-05-31 IT IT67695/82A patent/IT1157016B/en active
- 1982-06-01 GB GB8215955A patent/GB2099417B/en not_active Expired
- 1982-06-01 FR FR8209484A patent/FR2510546B2/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2313328A1 (en) * | 1975-06-02 | 1976-12-31 | Hoya Glass Works Ltd | GLASS COMPOSITIONS FOR EYEWEAR GLASSES |
FR2334640A1 (en) * | 1975-12-10 | 1977-07-08 | Hoya Corp | CONTACT LENS GLASS |
FR2486516A1 (en) * | 1980-07-14 | 1982-01-15 | Jenaer Glaswerk Schott & Gen | LIGHTWEIGHT GLASS, OPTICALLY OPHTHALMIC, HAVING GOOD ACID AND HYDROLYSIS |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2793240A1 (en) * | 1999-05-06 | 2000-11-10 | Schott Glas | OPTICAL LENSES WITHOUT LEAD |
Also Published As
Publication number | Publication date |
---|---|
DE3121824C2 (en) | 1984-06-14 |
ES8308291A2 (en) | 1983-09-01 |
BR8203146A (en) | 1983-05-17 |
FR2510546B2 (en) | 1985-10-25 |
JPS57200249A (en) | 1982-12-08 |
IT8267695A0 (en) | 1982-05-31 |
GB2099417A (en) | 1982-12-08 |
JPS638056B2 (en) | 1988-02-19 |
IT1157016B (en) | 1987-02-11 |
DE3121824A1 (en) | 1983-02-03 |
GB2099417B (en) | 1984-11-28 |
ES512714A0 (en) | 1983-09-01 |
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