Schott Ag

Schott Glas

Other

Schott Glaswerke

Bam Bundesanstalt Fuer Materialforschung Und-pruefung

Uwe Kolberg

Simone Monika Ritter

Werner Kiefer

Silke Wolff

Monika Gierke

Ute Woelfel

Hildegard R&ouml;mer

Hildegard Römer

Magdalena Winkler-Trudewig

Christian Kunert

Karin Naumann

Karl Mennemann

Danuta Grabowski

Volker Ohmstede

Rolf Clasen

Michael Leister

Paul Kissl

Thomas Kirsch

Jochen Freund

Frank-Thomas Lentes

Wolfgang Schmidbauer

Ina Mitra

Stefanie Hansen

Norbert Greulich-Hickmann

Guido Räke

Axel Curdt

Thomas Weingaertner

Caroline De Luca

Doris Ehrt

Peter-Franz Skiba

Holger Kasprzik

Ruediger Hentschel

Ulrich Peuchert

Joseph S Hayden

Burkhard Speit

Thomas Pfeiffer

Peter Nass

Joerg Hinrich Fechner

Holger Wegener

Erich Rodek

Frank Buellesfeld

Günter Weidmann

Lothar Willmes

Joern Besinger

Axel Engel

Markus Kappel

Ute Resch-Genger

Thomas Weingärtner

Katrin Hoffmann

Guido R&auml;ke

Georg Krolla

Thomas Henrich

Hans-Werner Schock

Thomas Lifka

Michael Stelzl

Sybill Nuettgens

Ernst-Walter Schaefer

Michael Kohl

Sybill Nüttgens

Rainer Haspel

Stefan Schmitt

Hildegard Roemer

Nicole Surges

Helge Vogt

Guenther Kron

Wolfgang Eis

Andreas Gross

Thomas Stelle

Ralf Domres

Norbert Wolfram Gehenn

Frank Thomas Lentes

Christine Köble

Raymund Schäffler

Detlef K&ouml;psel

Ute W&ouml;lfel

Alwin Weitzel

Jörn Besinger

Wolfram Gehenn

Thomas Heinrich

Ernest Walter Schäfer

Detlef Köpsel

Günther Kron

Glasses are provided that are highly transparent and have very good resistance to solarisation. The resistance to solarisation is favoured to a special extent by the production method. The concentrations of reduced polyvalent ion species are reduced by targeted use of bubbling with an oxidising gas. Methods for producing glasses and to the uses thereof, particularly as core glasses in optical waveguides, are also provided.

Highly transmissive glasses with high solarisation resistance, use thereof and method for production thereof

The glasses of the present disclosure are highly transparent and have very good resistance to solarization. The resistance to solarization arises from the production method. The concentrations of reduced polyvalent ion species are reduced by targeted use of bubbling with an oxidizing gas. Methods for producing glasses and to the uses thereof, particularly as core glasses in optical waveguides, are also provided.

Thin glasses having high refractive index (n), a layer composite assembly made from these thin glasses, a method for the production of the thin glasses, and the uses of the thin glasses are provided. The thin glasses are processed in an in line manufacturing process and have the optical properties of a classical optical glass. The thin glasses are highly transparent, crystallization-resistant, chemically resistant and highly refractive. The viscosity/temperature behavior of the thin glasses is adjusted to the manufacturing process via in line flat glass methods.

Highly refractive thin glasses

A method and a device for the continuous production of glass and glass ceramic products from a glass melt is provided, which simplifies the changing between two kinds of glass. The device includes a melting crucible and an induction coil, which preferably extends around the melting crucible in order to heat a glass melt by means of an induction field generated by the induction coil. The wall elements, which form the side wall of the crucible, have cooling channels, through which a cooling fluid can be conducted, so that the glass melt solidifies on the side wall and forms a skull layer. The interior side of the wall elements is formed at least in part by an aluminum nitride-containing ceramic.

Method and device for producing glass products from a glass melt

The lead-free and arsenic-free optical glasses have a refractive index of 1.83&#x2266;n&#x2266;1.95 and an Abb&#xe9; number of 24&#x2266;&#x3bd;&#x2266;35, good chemical resistance, excellent crystallization stability and a composition, in wt. % based on oxide content, of SiO, 2-8; BO, 15-22; LaO, 35-42; ZnO, 10-18; TiO, 9-15; ZrO, 3-10; NbO, 4-10; and WO, &#x3e;0.5-3. Besides containing at most 5 wt. % of each of GeO, AgO and BaO and conventional fining agents, they may also contain at most in total 5 wt. % of AlO, MgO, CaO, SrO, POand up to at most in total 5 wt. % of the components F, TaO. The glasses are preferably free of alkali metal oxides, BiO, YO, GdOand/or YbO. Optical elements made from the optical glass are also described.

Optical glass, optical elements made therefrom, method of making the optical elements from the glass, and optical components comprising one or more optical elements

In the method and system for producing glass reduction of reduction-sensitive ingredients in the glass is reduced or preferably is avoided during the melting and fining processes. The glass preferably has a high refractive index. During the process an oxidizing agent is inducted into a fining vessel and preferably also into a melt crucible made of a slit skull that is cooled by a cooling agent. The oxidizing agent is preferably oxygen. Furthermore a system for conducting the method is also described.

Method and system for producing glass, in which chemical reduction of glass components is avoided

In the apparatus for producing glass reduction of reduction-sensitive components in the glass melt is reduced or preferably is prevented during the melting and/or fining processes by introducing an oxidizing agent into the glass melt. The apparatus has a melt crucible, a fining vessel, and a device for conducting oxygen and/or ozone into the glass melt in the melt crucible and/or fining vessel, in order to suppress reduction of reduction-sensitive components of the glass melt. A preferred embodiment of the apparatus has a metallic skull crucible, which includes the melt crucible and/or the fining vessel. The apparatus preferably includes a homogenization unit connected to the fining vessel to receive glass melt from the fining vessel in order to further process the glass melt after refining.

A core glass and a fiber-optic light guide made from it and a cladding glass are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO; 18.5-30, ZnO; 8-20, &#x3a3; alkali metal oxides; 0.5-3, LaO; 2-5, ZrO; 0.02-5, HfO; 2.02-5, &#x3a3; ZrO+HfO; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, &#x3a3; alkaline earth metal oxides; 0.5-3, LiO, but no more LiO than 25% of the &#x3a3; alkali metal oxides; &#x3e;58.5, &#x3a3; SiO+ZrO+HfO. A molar ratio of NaO/KO is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.

Core glass in the alkali-zinc-silicate glass system for an fiber-optic light guide and fiber-optic light guide made with said core glass

Step-index optical waveguides are made of multicomponent glass containing a core glass and an outer glass which entirely surrounds the core class. A fiber-optic cable for conducting electromagnetic radiation, contains at least one bundle of individual fibers which encompass the step-index optical waveguides that are made of multicomponent glass containing a core glass and an outer glass that entirely surrounds the core glass on the circumferential wall thereof. These step-index optical waveguides provide great transmission capacity for transmitting data while keeping the transfer characteristics sufficiently durable. Furthermore, the fiber-optic cable is resistant against physical and chemical environmental influences and be protected against radical ambient chemicals. These aims are achieved by the fact that the outer glass of the step-index optical waveguides is provided with a material composition which is largely free from chemical interactions with the core glass when the fibers are drawn and is chemically inactive towards the plastic jacket.

Fiber-optic cable

The X-ray opaque glass is characterized by a composition, in mol %, of SiO, 75-98; YbO, 0.1 to 40; and ZrO, 0 to 40. Preferred embodiments of the glass are free of AlOand BO. The glass is produced from the glass batch by melting at a temperature of at least 1500&#xb0; C. in an iridium or iridium alloy vessel with the assistance of high-frequency radiation. In preferred embodiments of the glass production process at least one raw material ingredient is present in the batch as a nanoscale powder. The glass is useful in dental applications, optical applications, and biomedical applications, or for photovoltaics, or as a target material in PVD processes.

X-ray opaque glass, method for the production and use thereof

The invention discloses a standard for referencing luminescence signals, having an optically transparent base material comprising a lanthanum phosphate glass, a fluorophosphate glass, a fluor-crown glass, a lanthanum glass, a glass-ceramic formed therefrom or a lithium aluminosilicate glass-ceramic, the base material including a bulk doping with at least one constituent which is luminescent and comprises at least one rare earth and/or a nonferrous metal, in particular cobalt, chromium or manganese.

Standard for referencing luminescence signals

A method and an apparatus for the rapid melting of glasses in a skull crucible is provided. The method and apparatus introduce high-frequency energy into the contents of the crucible by means of a coil arrangement surrounding the skull crucible, in order to heat the melt, and the batch is laid and the molten glass discharged in the upper region of the crucible, and undissolved constituents of the batch are retained by means of a cooled bridge which is immersed in the melt. The glass is taken off above the coil arrangement and is fed for further processing without flowing through the coil region.

Method and device for melting glass using an induction-heated crucible with cooled crust

A short optical glass is disclosed which is particularly suited for the applications imaging, projection, telecommunication, optical information technology and/or laser technology, also particularly suited for fiber applications (light guides or imaging guides). Preferably, the glass has a refractive index of 1.54&#x2266;n&#x2266;1.62 and an Abbe coefficient of 48&#x2266;v=57. It further has good attenuating and ion exchange characteristics, good chemical stability and good crystallization stability. The glass comprises 35 to 50 wt.-% SiO, 0.1 to 6 wt.-% BO, 0.1 to 7 wt.-% AlO, 0.1 to 4 wt.-% PO, 4 to 24 wt.-% RO (alkali oxides), 6 to 14.5 wt.-% BaO, 0 to 12 wt.-% other RO (alkaline earth oxides), 14 to 25 wt.-% ZnO, 0 to 5 wt.-% LaO, 0 to 10 wt.-% ZrO, wherein RO is an alkali oxide, RO is an alkaline earth oxide other than BaO, wherein LiO is 6 wt.-% at the most, wherein the glass does not contain any GeO, SnO, SnO, AgO, SbOand, preferably, no rare earth oxides, and wherein the glass may be molten while adding suitable purifying agents.

Boron aluminosilicate glass

The double crucible for a glass drawing method has a heatable outer crucible () and an inner crucible () surrounded by the outer crucible (), which is heatable separately from the outer crucible (). Both crucibles () have an outlet nozzle () for the glass to be drawn. To make glass fibers from heavy metal oxide glass (HMO-glass) with higher quality and comparatively simple crucible features, the outlet nozzle () of the outer crucible () extends a certain distance beyond the outlet nozzle () of the inner crucible (). Surfaces of the outlet nozzles coming in contact with the glass melt are polished and are provided on a material, which has a reducing action on heavy metal glass in the melt in all cases. These surfaces also have sufficient mechanical strength for and chemical inertness to heavy metal oxide glass.

Double crucible for a glass drawing method and method of making glass fiber or a preform with the double crucible

A short optical glass is disclosed which does not comprise any silver, copper, thallium, lead or boron and is particularly suited for the application imaging, projection, telecommunication, optical information technology, and/or laser technology, also particularly suited for fiber applications (light guides or imaging guides). Preferably the glass has a refractive index of 1.55&#x2266;n&#x2266;1.65 and an Abbe coefficient of 48&#x2266;v&#x2266;57 and also has good attenuating and ion exchange characteristics, good chemical stability and good crystallization stability. The glass comprises 35 to &#x3c;50 wt.-% SiO; 1 to 10 wt.-% AlO; 5 to 15 wt.-% NaO+KO+CSO+LiO; 20 to 30 wt.-% BaO; 0 to 15 wt.-% ZnO; 0 to 10 wt.-% LaO; 0 to 10 wt.-% ZrO; 0 to 6 wt.-% PO; 0 to 8 wt.-% MgO+CaO+SrO; 0 to 3 wt.-% of other oxides, and CsO&#x3c;1, LiO&#x3c;1, and TiO&#x3c;1 wt.-%.

Aluminosilicate glass

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Mainz, Germany

Uwe Kolberg