DE1188248B - Optical borate glass of high refraction - Google Patents

Optical borate glass of high refraction

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Publication number
DE1188248B
DE1188248B DES74174A DES0074174A DE1188248B DE 1188248 B DE1188248 B DE 1188248B DE S74174 A DES74174 A DE S74174A DE S0074174 A DES0074174 A DE S0074174A DE 1188248 B DE1188248 B DE 1188248B
Authority
DE
Germany
Prior art keywords
percent
weight
borate glass
optical
optical borate
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.)
Pending
Application number
DES74174A
Other languages
German (de)
Inventor
Dipl-Chem Dr Werner Vogel
Wolfgang Heindorf
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.)
SAALE GLAS GmbH
Original Assignee
SAALE GLAS 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 SAALE GLAS GmbH filed Critical SAALE GLAS GmbH
Priority to DES74174A priority Critical patent/DE1188248B/en
Publication of DE1188248B publication Critical patent/DE1188248B/en
Pending 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
    • C03C3/07—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
    • 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
    • C03C3/12—Silica-free oxide glass compositions
    • C03C3/14—Silica-free oxide glass compositions containing boron
    • C03C3/15—Silica-free oxide glass compositions containing boron containing rare earths
    • C03C3/155—Silica-free oxide glass compositions containing boron containing rare earths containing zirconium, titanium, tantalum or niobium

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)

Description

Optisches Boratglas hoher Brechung Gegenstand der vorliegenden Erfindung sind optische Boratgläser hoher Brechung und mittlerer Dispersion, deren optische Eigenschaften im v-ND-Diagramm in einem Bereich liegen, in welchem bisher sehr wenige technisch verwendbare optische Gläser bekannt wurden.High refraction optical borate glass is the subject of the present invention are optical borate glasses of high refraction and medium dispersion, their optical Properties in the v-ND diagram are in a range in which very few so far technically usable optical glasses became known.

Beim Einsatz derartiger Gläser mit ND > 1,80 und v > 25 in der Optik lassen sich Öffnungsfehler günstiger korrigieren und unter anderem auch durch Einsparung optischer Elemente in Kombination Optiken höherer Leistung erzielen. Die erfindungsgemäßen Gläser bauen sich auf das Grundsystem B203 - La203 - TiO2 auf, dessen Zusammensetzung durch folgende Grenzwerte bestimmt ist: 20 bis 35 Gewichtsprozent B203 50 bis 65 Gewichtsprozent La203 5 bis 25 Gewichtsprozent Ti02 Das charakteristische Merkmal der angegebenen Boratgläser ist ein hoher Gehalt an La203 und außerdem ein Ti02-Gehalt. Die Summe dieser beiden Oxyde ist vorwiegend höher als 60 Gewichtsprozent. Durch diese Schmelzkombination werden nicht nur extreme optische Eigenschaften erreicht, sondern gleichzeitig große Härte und sehr gute chemische Beständigkeit. Die Kristallisationsneigung der ternären Gläser ist gering. Es muß jedoch ein weiterer Zusatz an kleinen und hoch geladenen netzwerkwandelnden Kationen möglichst vermieden werden.When using such glasses with ND > 1.80 and v> 25 in the optics, aperture errors can be corrected more cheaply and, among other things, optics with higher performance can be achieved by saving optical elements in combination. The glasses according to the invention are based on the basic system B203 - La203 - TiO2, the composition of which is determined by the following limit values: 20 to 35 percent by weight B203 50 to 65 percent by weight La203 5 to 25 percent by weight Ti02 The characteristic feature of the specified borate glasses is a high La203 content and also a Ti02 content. The sum of these two oxides is predominantly greater than 60 percent by weight. This fusion combination not only achieves extreme optical properties, but also great hardness and very good chemical resistance. The tendency of the ternary glasses to crystallize is low. However, a further addition of small and highly charged network-converting cations must be avoided as far as possible.

Es ist bekannt, daß bisher dem umfangreichen Einsatz von Titandioxyd in der optischen Glasproduktion verschiedene, vorwiegend durch Ti02-Rohstoffe hervorgerufene Glasfarbstiche entgegenstanden.It is known that so far the extensive use of titanium dioxide various in optical glass production, mainly caused by Ti02 raw materials Glass color casts opposed.

So werden z. B. durch Eisenspuren nur schwachgrünstichige Glasschmelzen bei gleichzeitiger Anwesenheit von Titanverbindungen tief dunkelbraun gefärbt, wobei sich die Verbindung FeTi03 (Ilmenit) bildet. Diese dem Einsatz von TiOz bei der Herstellung von optischem Glas entgegenstehenden Schwierigkeiten können durch Verwendung nur eisenfreier Rohstoffe beseitigt werden.So z. B. only slightly green-tinged glass melts due to traces of iron with the simultaneous presence of titanium compounds colored deep dark brown, whereby the compound FeTi03 (ilmenite) is formed. This the use of TiOz in the Manufacture of optical glass can overcome difficulties by using it only iron-free raw materials are eliminated.

Durch Wechselwirkungen zwischen Ionen kommt es besonders in Gegenwart von Titan zu starken Polarisations- und Deformationserscheinungen, wodurch gleichfalls Farbvertiefungen eintreten. Diese können weitestgehend durch Zusatz entsprechend kontrapolarisierend wirkender Ionen aufgehoben werden.Because of interactions between ions, it occurs especially in the presence from titanium to strong polarization and deformation phenomena, which also Color depressions occur. These can largely be added accordingly ions with a counter-polarizing effect are canceled.

Oftmals werden titanhaltige Glasschmelzen durch Anwesenheit reduzierend wirkender Rohstoffverunreinigungen infolge Reduktion von vierwertigem Titan zu dreiwertigem oder sogar zu zweiwertigem Titan tiefviolett oder gelbbraunstichig verfärbt.Often, titanium-containing glass melts become reducing due to their presence effective raw material impurities as a result of the reduction of tetravalent titanium to trivalent or even discolored to bivalent titanium in a deep violet or yellow-brownish tinge.

Solche sowohl durch Polarisations- als auch durch Reduktionserscheinungen hervorgerufene Färbungen von titanhaltigen Glasschmelzen können durch Zusätze von Arsenaten nahezu völlig verhindert werden. Bei Einsatz eisenfreier Rohstoffe können die erfindungsgemäßen Gläser farblos erhalten werden.Such by both polarization and reduction phenomena Coloring of titanium-containing glass melts can be caused by the addition of Arsenates are almost completely prevented. When using iron-free raw materials, the glasses according to the invention are obtained colorless.

Zusätze von Ta205, Nb205 und W03 erhöhen die Brechwerte und erniedrigen die Dispersion. Die Stabilität der Gläser kann durch Zusätze von SiO2 und A1203 noch verbessert werden.Additions of Ta205, Nb205 and W03 increase and decrease the refractive index the dispersion. The stability of the glasses can be increased by adding SiO2 and A1203 still to be improved.

Die folgende Tabelle zeigt einige Anwendungsbeispiele der nach der Erfindung hergestellten Gläser. "' .Ö Ö Ö x: @O ORt c# c 3 # O0 0 O Ll z #, a h z x C r@ @. H 3 z 1 27,2 55,5 17,3 - - - - - - - - - - 1,89031 31,6 2 30,0 60,0 10,0 - - - - - - - - - - 1,83772 37,7 3 28,0 58,0 14,0 - - - - - - - - - - 1,86957 33,8 4 23,0 58,0 19,0 - - - - - - - - - - 1,92840 28,1 5 30,0 54,0 16,0 - - - , - - - - - - - 1,86625 32,4 ä ° d Q ö ö ° ° ° d j d i ü .ö ° 0" V o z Pö ä H z x C Q #. h 3 z 6 27,7 58,0 13,8 0,5 - - - - - - - - - 1,87066 33,7 7 28,0 56,0 12,0 - 4,0 - - - - - - - - 1,83643 35,2 8 28,0 56,0 12,0 - - 4,0 - - - - - - - 1,83291 35,2 9 26,0 58,0 11,0 - - 5,0 - - - - - - - 1,84349 34,2 10 28,0 54,5 12,5 - - - 5,0 - - - - - - 1,84616 35,8 11 28,0 51,0 11,0 - - - 10,0 - - - - - - 1,82201 37,7 12 28,0 54,5 12,5 - - - - 5,0 - - - - - 1,84667 35,7 13 27,0 60,0 10,0 - - - - - 3,0 - - - - 1,84638 37,5 14 28,0 57,0 7,0 - - - - - - 8,0 - - - 1,83099 39,0 15 27,2 55,5 10,0 - - - - - - - 7,3 - - 1,85383 35,1 16 27,2 55,5 5,0 - - - - - - - 12,3 - - 1,82063 38,5 17 28,0 58,0 10,0 - - - - - 1 - - - - 4,0 1,83434 37,4The following table shows some application examples of the glasses produced according to the invention. "'.Ö Ö Ö x: @ O ORt c # c 3 # O0 0 O Ll z #, ahzx C r @ @. H 3 e.g. 1 27.2 55.5 17.3 - - - - - - - - - - 1.89031 31.6 2 30.0 60.0 10.0 - - - - - - - - - - 1.83772 37.7 3 28.0 58.0 14.0 - - - - - - - - - - 1.86957 33.8 4 23.0 58.0 19.0 - - - - - - - - - - 1.92840 28.1 5 30.0 54.0 16.0 - - -, - - - - - - - 1.86625 32.4 ä ° d Q ö ö ° ° ° djdi ü .ö ° 0 "V oz Pö ä H zx CQ #. h 3 z 6 27.7 58.0 13.8 0.5 - - - - - - - - - 1.87066 33.7 7 28.0 56.0 12.0 - 4.0 - - - - - - - - 1.83643 35.2 8 28.0 56.0 12.0 - - 4.0 - - - - - - - 1.83291 35.2 9 26.0 58.0 11.0 - - 5.0 - - - - - - - 1.84349 34.2 10 28.0 54.5 12.5 - - - 5.0 - - - - - - 1.84616 35.8 11 28.0 51.0 11.0 - - - 10.0 - - - - - - 1.82201 37.7 12 28.0 54.5 12.5 - - - - 5.0 - - - - - 1.84667 35.7 13 27.0 60.0 10.0 - - - - - 3.0 - - - - 1.84638 37 .5 14 28.0 57.0 7.0 - - - - - - 8.0 - - - 1.83099 39.0 15 27.2 55.5 10.0 - - - - - - - 7.3 - - 1.85383 35.1 16 27.2 55.5 5.0 - - - - - - - 12.3 - - 1.82063 38.5 17 28.0 58.0 10.0 - - - - - 1 - - - - 4.0 1.83434 37.4

Claims (1)

Patentansprüche: 1.OptischesBoratglashoherBrechung(ND> 1,80) und mittlerer Dispersion, d a d u r c h g e k e n nz e i c h n e t, daB es sich auf ein Grundglassystem B,0, - La,0, - TiO, aufbaut, dessen Zusammensetzung durch folgende Grenzwerte bestimmt ist: 20 bis 35 Gewichtsprozent B,03 50 bis 65 Gewichtsprozent La203 5 bis 25 Gewichtsprozent TiO2 2. Optisches Boratglas nach Anspruch 1, dadurch gekennzeichnet, daB der Schmelzsatz zur Änderung des Brechwerts und der Dispersion Zusätze bis zu 10 Gewichtsprozent Ta205, 5 Gewichtsprozent Nb2O5, 15 Gewichtsprozent W03 einzeln oder gemischt enthält. 3. Optisches Boratglas nach Anspruch 1 oder 2, dadurch gekennzeichnet, daB der Schmelzsatz bis zu 10 Gewichtsprozent an Me3IAs04, Me3Ii(As04)2, Pb3(As04)2, (Mei = Na, K), (Meii = Ca, Sr, Ba) einzeln oder gemischt enthält. 4. Optisches Boratglas nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daB es zusätzlich bis zu 5 Gewichtsprozent Si02 und/oder 5 Gewichtsprozent A1203 enthält.Claims: 1. Optical borate glass high refraction (ND> 1.80) and medium Dispersion, which does not indicate that it is based on a basic glass system B, 0, - La, 0, - TiO, whose composition is determined by the following limit values is: 20 to 35 percent by weight B, 03 50 to 65 percent by weight La203 5 to 25 percent by weight TiO2 2. Optical borate glass according to Claim 1, characterized in that the melting charge to change the refractive index and the dispersion, additives up to 10 percent by weight Ta205, 5 percent by weight Nb2O5, 15 percent by weight W03, individually or mixed. 3. Optical borate glass according to claim 1 or 2, characterized in that the melting charge up to 10 percent by weight of Me3IAs04, Me3Ii (As04) 2, Pb3 (As04) 2, (Mei = Na, K), (Meii = Ca, Sr, Ba) contains individually or mixed. 4. Optical borate glass after a of claims 1 to 3, characterized in that it is additionally up to 5 percent by weight Contains Si02 and / or 5 percent by weight A1203.
DES74174A 1961-06-01 1961-06-01 Optical borate glass of high refraction Pending DE1188248B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES74174A DE1188248B (en) 1961-06-01 1961-06-01 Optical borate glass of high refraction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES74174A DE1188248B (en) 1961-06-01 1961-06-01 Optical borate glass of high refraction

Publications (1)

Publication Number Publication Date
DE1188248B true DE1188248B (en) 1965-03-04

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ID=7504468

Family Applications (1)

Application Number Title Priority Date Filing Date
DES74174A Pending DE1188248B (en) 1961-06-01 1961-06-01 Optical borate glass of high refraction

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536504A (en) * 1965-09-04 1970-10-27 Jenaer Glaswerk Schott & Gen Optical glasses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3536504A (en) * 1965-09-04 1970-10-27 Jenaer Glaswerk Schott & Gen Optical glasses

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