DE962288C - Optical glass - Google Patents

Optical glass

Info

Publication number
DE962288C
DE962288C DEL19803A DEL0019803A DE962288C DE 962288 C DE962288 C DE 962288C DE L19803 A DEL19803 A DE L19803A DE L0019803 A DEL0019803 A DE L0019803A DE 962288 C DE962288 C DE 962288C
Authority
DE
Germany
Prior art keywords
percent
weight
silica
optical glass
anhydride
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
DEL19803A
Other languages
German (de)
Inventor
Norbert Meinert
Gustav Weissenberg
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
Priority to DEL19803A priority Critical patent/DE962288C/en
Application granted granted Critical
Publication of DE962288C publication Critical patent/DE962288C/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

Description

Optisches Glas Zusatz zum .Patent 91813'5 Gegenstand der Erfindung sind optische Krongläser mit anomaler Teildispersion nach Patent gig 195.Optical glass addition to. Patent 91813'5 The invention relates to optical crown glasses with anomalous partial dispersion according to patent gig 195.

In dem Patent ,gig 195 sind Gläser, beschrieben, die aus einem Gemenge von Borsäureanhydrid, Zirkonoxyd und mindestens einem Alkalioxyd erschmolzen sind, wobei das Alkalioxyd zweckmäßig als Allkalicarbonat dem Gemenge zugefügt ist. Ferner ist angegeben, daß diese Gläser darüber hinaus noch Anteile an Aluminiumoxyd, Kieselsäure u. dgl. aufweisen können, wie sie für die Stabilisierung solcher Gläser bekannt sind, d. h. Anteile in Höhe bis zu etwa 3 Gewichtsprozent.In the patent, gig 195, glasses are described that are made from a mixture boric anhydride, zirconium oxide and at least one alkali oxide have melted, the alkali metal being expediently added to the mixture as alkali metal carbonate. Further it is stated that these glasses also contain aluminum oxide and silicic acid and the like, as are known for the stabilization of such glasses are, d. H. Proportions up to about 3 percent by weight.

Es hat sich nun gezeigt, daß besonders harte und witterungsbeständige Gläser, die im wesentlichen aus Borsäureanhydrid, Zirkonoxyd und Lithiumoxyd bestehen, erzielt werden, wenn, Kieselsäure in einem Anteil von 2 bis 3o Gewichtsprozent dem Glas zugesetzt ist. Der Gesamtanteil an Borsäure und Kieselsäure soll 5o Gewichtsprozent nicht unterschreiten. Im einzelnen werden die Gläser aus Gemengen erschmolzen, die aus 3o bis 7o Gewichtsprozent Borsäureanhydrid, 2 bis 3o Gewichtsprozent Kieselsäure; io bis 25 Gewichtsprozent Zirkonoxyd und über io Gewichtsprozent Lithiumoxyd bestehen; gegebenenfalls kann bis zu io Gewichtsprozent Wolframsäureanhydrid vorhanden sein.It has now been shown that particularly hard and weather-resistant Glasses, which essentially consist of boric anhydride, zirconium oxide and lithium oxide, be achieved if, silica in a proportion of 2 to 3o weight percent Glass is added. The total proportion of boric acid and silica should be 50 percent by weight not fall below. In detail, the glasses are made from mixtures melted that of 3o to 7o percent by weight boric anhydride, 2 to 3o percent by weight Silica; 10 to 25 percent by weight of zirconium oxide and over 10 percent by weight of lithium oxide exist; optionally up to 10 percent by weight of tungstic anhydride can be present be.

In nachstehender Tabelle werden Beispiele derartiger Schmelzen angeführt. Tabelle (in Gewichtsprozent) Schmelz-Nr. Lia0 B2 0 3 zr02 S102 W03 nd v x@ d v B 105 i4,4 66,3 i6,4 2,9 - 45958 56,3 535 -8,o B 1o6 14,0 64,8 i8,3 2,9 - i,5926 56,5 540 -4,8 B iog i3,5 61:,6 19,5 5,4 - 1,6o65 54,5 537 -8,5 B 112 i3,1 57,6 19,6 9,9 - 1,6070 54,5 537 -8,5 B 113 13,1 52,6 19,6 14,7 - 1,6057 54,5 538 -7,8 B 117 13,1 43,0 19,6 24,3 - i,6o7i 54,3 539 -7,5 B iig 13,1 35,8 23,2 27,9 - 1,6172 52,7 544 -6,2 B 115 13,1 47,8 1:9,6 14,7 4.8 1,6142 52,8 540 1--8,4 B 116 13,1 43,0 22,0 14,7 7,2 1,6282 51, 0 543 -8,4 Die Schmelzen gemäß der vorstehenden Tabelle sind in Platintiegeln durchgeführt. Selbstverständlich können in diesen Gemengesätzen noch bis zu 5 Gewichtsprozent von stabilisierenden und/oder entfärbenden Substanzen zugesetzt werden.Examples of such melts are given in the table below. Table (in percent by weight) Enamel no. Lia0 B2 0 3 zr02 S102 W03 nd vx @ dv B 1 0 5 i4.4 66.3 i6.4 2.9 - 45958 56.3 535 -8, o B 1o6 14.0 64.8 i 8.3 2.9 - i, 5926 56.5 540 -4.8 Biog i3.5 61:, 6 1 9 , 5 5.4 - 1.6065 54.5 537 -8.5 B 112 i3.1 57.6 19.6 9.9 - 1.6070 54.5 537 -8.5 B 113 13.1 52.6 19.6 14.7 - 1.6057 54.5 538 -7.8 B 117 13.1 43.0 19.6 24.3 - i, 6o7i 54.3 539 -7.5 B iig 13.1 35.8 23.2 27.9 - 1.6172 52.7 544 -6.2 B 115 13.1 47.8 1: 9.6 14.7 4.8 1.6142 52.8 540 1--8.4 B 116 13.1 43.0 22.0 14.7 7.2 1.6282 51, 0 543 -8.4 The melts according to the table above are carried out in platinum crucibles. Of course, up to 5 percent by weight of stabilizing and / or decolorizing substances can be added to these batches.

Claims (3)

PATENTANSPRÜCHE: i. Optisches Kronglas mit anomaler Teildispersion nach Patent 9,9 195, das im wesentlichen aus Borsäureanhydrid, Zirkonoxyd und Lithiumoxyd besteht, dadurch gekennzeichnet, daß es zusätzlich 2 bis 3o Gewichtsprozent Kieselsäure enthält. PATENT CLAIMS: i. Optical crown glass with anomalous partial dispersion according to patent 9.9 1 95, which consists essentially of boric anhydride, zirconium oxide and lithium oxide, characterized in that it additionally contains 2 to 3o percent by weight of silica. 2. Optisches Kronglas nach Anspruch i, dadurch gekennzeichnet, daß .das Glas zusätzlich bis zu io Gewichtsprozent Wolframsäureanhydrid enthält. 2. Optical crown glass according to claim i, characterized in that that .das glass additionally contains up to 10 percent by weight of tungstic anhydride. 3. Optisches Kronglas nach Anspruch i oder 2, dadurch gekennzeichnet, daß der Anteil an Borsäureanhydrid und Kieselsäure zusammen mindestens 5o Gewichtsprozent beträgt. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 919:195.3. Optical crown glass according to claim i or 2, characterized in that the proportion of boric anhydride and silica together is at least 5o percent by weight. Documents considered: German Patent No. 919: 195.
DEL19803A 1954-09-14 1954-09-14 Optical glass Expired DE962288C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL19803A DE962288C (en) 1954-09-14 1954-09-14 Optical glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL19803A DE962288C (en) 1954-09-14 1954-09-14 Optical glass

Publications (1)

Publication Number Publication Date
DE962288C true DE962288C (en) 1957-04-18

Family

ID=7261526

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL19803A Expired DE962288C (en) 1954-09-14 1954-09-14 Optical glass

Country Status (1)

Country Link
DE (1) DE962288C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396331A1 (en) * 1977-07-01 1979-01-26 Leitz Ernst Gmbh

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE919195C (en) * 1952-11-22 1954-10-14 Leitz Ernst Gmbh Optical crown glass

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE919195C (en) * 1952-11-22 1954-10-14 Leitz Ernst Gmbh Optical crown glass

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2396331A1 (en) * 1977-07-01 1979-01-26 Leitz Ernst Gmbh

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