Patents by Inventor Andreas Langner
Andreas Langner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9901653Abstract: A UV lamp including a filter material of doped quartz glass is provided that effects a transparency as high as possible for operating radiation in the ultraviolet spectral range above 210 nm together with low transparency in the wavelength range below about 190 nm. The filter material of doped quartz glass includes at least 99 wt. % of SiO2 and Al2O3, wherein the Al2O3 portion is in the range of 2 wt. % to 4 wt. The filter material has an edge wavelength at a wavelength below 190 nm and a spectral transmission of 80% mm?1 or higher at a wavelength of 210 nm.Type: GrantFiled: September 29, 2016Date of Patent: February 27, 2018Assignees: Heraeus Quarzglas GmbH & Co. KG, Heraeus Noblelight GmbHInventors: Mark Stamminger, Christoph Söller, Franz-Josef Schilling, Erich Arnold, Gerhard Schötz, Mario Such, Andreas Langner, Björn Roos, Klaus Zoltner
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Publication number: 20170369359Abstract: A method for producing rare earth metal-doped quartz glass includes the steps of (a) providing a blank of the rare earth metal-doped quartz glass, and (b) homogenizing the blank by softening the blank zone by zone in a heating zone and by twisting the softened zone along a rotation axis. Some rare earth metals, however, show a discoloration of the quartz glass, which hints at an unforeseeable and undesired change in the chemical composition or possibly at an inhomogeneous distribution of the dopants. To avoid this drawback and to provide a modified method which ensures the production of rare earth metal-doped quartz glass with reproducible properties, during homogenization according to method step (b), the blank is softened under the action of an oxidizingly acting or a neutral plasma.Type: ApplicationFiled: June 27, 2017Publication date: December 28, 2017Inventors: Hardy BAIERL, Stephan GRIMM, Kay SCHUSTER, Jan DELLITH, Andreas LANGNER, Gerhard SCHOETZ, Walter LEHMANN, Thomas KAYSER
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Publication number: 20170203995Abstract: The aim of the invention is to improve a generally known method for producing quartz glass doped with fluorine, wherein SiO2 particles are formed in the presence of fluorine by means of a plasma deposition process, deposited in layers on an outer envelope of a cylindrical quartz glass substrate body rotating about its longitudinal axis, and vitrified to form a layer of quartz glass with a fluorine content of at least 1.5 wt. %, in such a way that a quartz glass semifinished product with a high fluorine content, characterised by a high basic transmission in the UV wavelength range, is obtained. To this end, the substrate body has at least one reservoir layer of quartz glass at least in the region of the outer envelope thereof, having a minimum hydroxyl group content of 200 wt. ppm and/or a minimum hydrogen content of 1×1017 molecules/cm3, and the substrate body is either fully or partially removed following the deposition of the quartz glass layer doped with fluorine.Type: ApplicationFiled: March 29, 2017Publication date: July 20, 2017Inventors: Gerhard Schoetz, Karsten Braeuer, Andreas Langner
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Publication number: 20170095583Abstract: A UV lamp including a filter material of doped quartz glass is provided that effects a transparency as high as possible for operating radiation in the ultraviolet spectral range above 210 nm together with low transparency in the wavelength range below about 190 nm. The filter material of doped quartz glass includes at least 99 wt. % of SiO2 and Al2O3, wherein the Al2O3 portion is in the range of 2 wt. % to 4 wt. The filter material has an edge wavelength at a wavelength below 190 nm and a spectral transmission of 80% mm?1 or higher at a wavelength of 210 nm.Type: ApplicationFiled: September 29, 2016Publication date: April 6, 2017Inventors: Mark STAMMINGER, Christoph SÖLLER, Franz-Josef SCHILLING, Erich ARNOLD, Gerhard SCHÖTZ, Mario SUCH, Andreas LANGNER, Björn ROOS, Klaus ZOLTNER
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Patent number: 9518218Abstract: The invention relates to a method for producing a doped SiO2 slurry in which an SiO2 suspension is brought into interaction with at least one doping solution, wherein the SiO2 suspension and/or the doping solution act on one another in the form of an atomized spray, the average droplet diameter of which is in the range between 10 ?m and 100 ?m. The invention further relates to the use of an SiO2 slurry doped by the atomized spray method for the production of doped quartz glass, particularly for the production of laser-active quartz glass.Type: GrantFiled: June 25, 2013Date of Patent: December 13, 2016Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Mario Such, Gerhard Schoetz, Andreas Langner
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Publication number: 20160289116Abstract: The invention describes a method for the manufacture of quartz glass that comprises not only doping with rare earth elements and/or transition metals, but also fluorination of the quartz glass. The method described presently allows the diffusion of the dopants during fluorination to be prevented. Moreover, the invention relates to the quartz glass that can be obtained according to the method according to the invention and the use thereof as laser-active quartz glass, for generating light-guiding structures, and in optical applications.Type: ApplicationFiled: March 18, 2014Publication date: October 6, 2016Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Andreas LANGNER, Gerhard SCHOETZ, Mario SUCH, Malte SCHWERIN, Martin TROMMER, Stephan GRIMM, Andre KALIDE, Martin LEICH, Florian JUST
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Patent number: 9296639Abstract: The invention relates to a plasma deposition process for producing an optical preform, which is characterized by a cladding glass layer having a non-round internal cross-section together with high fluorine doping and axially and radially specified dopant distribution, which in the simplest case is as uniform as possible. For this purpose, a two-stage method is proposed, wherein a substrate body having a non-round cross-section is first reshaped into a coated substrate body having a circular cross-section in that a POD filling layer made of quartz glass having the nominal fluorine concentration is deposited onto a present filling surface and rounded by grinding, and then in the second stage of the method a POD sheathing glass layer made of fluorine-doped quartz glass and having a circular-ring-shaped cross-section is deposited.Type: GrantFiled: August 8, 2013Date of Patent: March 29, 2016Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Gerhard Schoetz, Karsten Bräuer, Richard Schmidt, Peter Bauer, Andreas Schultheis, Paul Bödiger, Andreas Langner
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Publication number: 20150218036Abstract: The invention relates to a plasma deposition process for producing an optical preform, which is characterized by a cladding glass layer having a non-round internal cross-section together with high fluorine doping and axially and radially specified dopant distribution, which in the simplest case is as uniform as possible. For this purpose, a two-stage method is proposed, wherein a substrate body having a non-round cross-section is first reshaped into a coated substrate body having a circular cross-section in that a POD filling layer made of quartz glass having the nominal fluorine concentration is deposited onto a present filling surface and rounded by grinding, and then in the second stage of the method a POD sheathing glass layer made of fluorine-doped quartz glass and having a circular-ring-shaped cross-section is deposited.Type: ApplicationFiled: August 8, 2013Publication date: August 6, 2015Inventors: Gerhard Schötz, Karsten Bräuer, Richard Schmidt, Peter Bauer, Andreas Schultheis, Paul Bödiger, Andreas Langner
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Publication number: 20150197688Abstract: The invention relates to a method for producing a doped SiO2 slurry in which an SiO2 suspension is brought into interaction with at least one doping solution, wherein the SiO2 suspension and/or the doping solution act on one another in the form of an atomised spray, the average droplet diameter of which is in the range between 10 ?m and 100 ?m. The invention further relates to the use of an SiO2 slurry doped by the atomised spray method for the production of doped quartz glass, particularly for the production of laser-active quartz glass.Type: ApplicationFiled: June 25, 2013Publication date: July 16, 2015Inventors: Mario Such, Gerhard Schoetz, Andreas Langner
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Publication number: 20150086462Abstract: The invention relates to a process for producing SiO2 granules by freezing and re-thawing an SiO2 suspension, wherein a separation of liquid and sediment composed of agglomerated SiO2 particles occurs in the course of thawing, the liquid removed is decanted and the residual moisture in the sediment is removed by a drying step with formation of the SiO2 granules. According to the invention, an auxiliary comprising alkali metal-free bases in the form of nitrogen hydrides is added to the suspension to set the pH greater than 7.Type: ApplicationFiled: April 25, 2013Publication date: March 26, 2015Inventors: Mario Such, Gerhard Schoetz, Andreas Langner
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Publication number: 20150017440Abstract: A quartz glass tube as a semi-finished product for an optical component that has an inner bore extending along a tube centre axis for the acceptance of a core rod and a tube wall limited by an inner casing surface and an outer casing surface is already known; within said tube wall an inner region made of a first quartz glass and an outer region made of a second quartz glass with a different index of refraction surrounding the inner region contact one another at a contact surface which runs around the centre axis. In order to provide a quartz glass on this basis that facilitates the production of optical components for special applications such as laser-activated optical components in wand or fibre form, the invention states that the contact surface has a non-round course in the radial cross-section and the inner casing surface has a circular course.Type: ApplicationFiled: January 17, 2013Publication date: January 15, 2015Inventors: Gerhard Schötz, Karsten Bräuer, Richard Schmidt, Peter Bauer, Andreas Schultheis, Clemens Schmitt, Andreas Langner
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Patent number: 8679344Abstract: A process for replacing the continuous phase of a nanoparticle dispersion with a less polar phase, includes filtering the dispersion through a semi-permeable membrane filter to remove the continuous phase, and introducing a less polar phase.Type: GrantFiled: August 28, 2009Date of Patent: March 25, 2014Assignee: Cerion Technology, Inc.Inventors: Thomas D. Allston, Laura M. Herder, Andreas Langner, Kenneth J. Reed
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Patent number: 8557171Abstract: The invention relates to a method allowing cost-effective production of doped quartz glass, particularly laser-active quartz glass, that is improved with regard to the homogeneity of the doping material distribution, in that a suspension is provided comprising SiO2 particles and an initial compound for at least one doping material in an aqueous fluid, the fluid being removed under formation of a doped intermediate product comprising particles of the doping material or particles of the precursor substance or the doping material, and the doped quartz glass is formed by sintering the doped intermediate product, wherein at least part of the particles of the doping material or the particles of the precursor substance of the same is generated in the suspension as a precipitate of a pH-value-controlled precipitation reaction of the initial compound.Type: GrantFiled: September 18, 2008Date of Patent: October 15, 2013Assignees: Heraeus Quarzglas GmbH & Co. KG, Institut fur Photonische TechnologienInventors: Andreas Langner, Thomas Kayser, Gerhard Schoetz, Mario Such, Johannes Kirchhof, Stephan Grimm, Volker Reichel
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Patent number: 8509269Abstract: Cylindrical optical components of quartz glass are known, which have an inner zone made of an inner zone glass, which extends in the direction of the longitudinal axis and is surrounded by a jacket zone made of a jacket zone glass, the average wall thickness thereof varying at least over a part of its length in the direction of the longitudinal axis of the component. The aim of the invention is to provide a method that allows a simple and cost-effective production of such an optical component from quartz glass.Type: GrantFiled: December 2, 2009Date of Patent: August 13, 2013Assignee: Heraeus Quarzglas GmbH & Co. KGInventors: Peter Bauer, Karsten Braeuer, Marco Flach, Andreas Langner, Richard Schmidt, Clemens Schmitt, Gerhard Schoetz, Matthias Stecher
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Publication number: 20120124899Abstract: A process for making cerium dioxide nanoparticles containing at least one transition metal (M) utilizes a suspension of cerium hydroxide nanoparticles prepared by mechanical shearing of an aqueous mixture containing an oxidant in an amount effective to enable oxidation of cerous ion to ceric ion, thereby forming a product stream that contains transition metal-containing cerium dioxide nanoparticles, Ce1-xMxO2, wherein “x” has a value from about 0.3 to about 0.8. The nanoparticles thus obtained have a cubic fluorite structure, a mean hydrodynamic diameter in the range of about 1 nm to about 10 nm, and a geometric diameter of less than about 4 nm. The transition metal-containing crystalline cerium dioxide nanoparticles can be used to prepare a dispersion of the particles in a nonpolar medium.Type: ApplicationFiled: December 17, 2008Publication date: May 24, 2012Inventors: Albert Gary Difrancesco, Thomas D. Allston, Richard K. Hailstone, Andreas Langner, Linda Langner, Kenneth J. Reed
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Publication number: 20110274129Abstract: Cylindrical optical components of quartz glass are known, which have an inner zone made of an inner zone glass, which extends in the direction of the longitudinal axis and is surrounded by a jacket zone made of a jacket zone glass, the average pt wall thickness thereof varying at least over a part of its length in the direction of the longitudinal axis of the component. The aim of the invention is to provide a method that allows a simple and cost-effective production of such an optical component from quartz glass.Type: ApplicationFiled: December 2, 2009Publication date: November 10, 2011Applicant: Hreaeus Quarzglas GmbH & Co. KGInventors: Peter Bauer, Karsten Braeuer, Marco Flach, Andreas Langner, Richard Schmidt, Clemens Schmitt, Gerhard Schoetz, Matthias Stecher
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Publication number: 20110177333Abstract: The aim of the invention is to improve a generally known method for producing quartz glass doped with fluorine, wherein SiO2 particles are formed in the presence of fluorine by means of a plasma deposition process, deposited in layers on an outer envelope of a cylindrical quartz glass substrate body rotating about its longitudinal axis, and vitrified to form a layer of quartz glass with a fluorine content of at least 1.5 wt. %, in such a way that a quartz glass semifinished product with a high fluorine content, characterised by a high basic transmission in the UV wavelength range, is obtained. To this end, the substrate body has at least one reservoir layer of quartz glass at least in the region of the outer envelope thereof, having a minimum hydroxyl group content of 200 wt. ppm and/or a minimum hydrogen content of 1×1017 molecules/cm3, and the substrate body is either fully or partially removed following the deposition of the quartz glass layer doped with fluorine.Type: ApplicationFiled: September 29, 2009Publication date: July 21, 2011Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Gerhard Schoetz, Karsten Braeuer, Andreas Langner
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Publication number: 20110056123Abstract: A method of making cerium dioxide nanoparticles includes: a) providing an aqueous reaction mixture having a source of cerous ion, a source of hydroxide ion, a nanoparticle stabilizer, and an oxidant at an initial temperature no higher than about 20° C.; b) mechanically shearing the mixture and causing it to pass through a perforated screen, thereby forming a suspension of cerium hydroxide nanoparticles; and c) raising the initial temperature to achieve oxidation of cerous ion to eerie ion and thereby form cerium dioxide nanoparticles having a mean diameter in the range of about 1 nm to about 15 nm. The cerium dioxide nanoparticles may be formed in a continuous process.Type: ApplicationFiled: September 4, 2007Publication date: March 10, 2011Applicant: CERION TECHNOLOGY, INC.Inventors: Albert Gary Difrancesco, Richard K. Hailstone, Andreas Langner, Kenneth J. Reed
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Publication number: 20100251771Abstract: The invention relates to a method allowing cost-effective production of doped quartz glass, particularly laser-active quartz glass, that is improved with regard to the homogeneity of the doping material distribution, in that a suspension is provided comprising SiO2 particles and an initial compound for at least one doping material in an aqueous fluid, the fluid being removed under formation of a doped intermediate product comprising particles of the doping material or particles of the precursor substance or the doping material, and the doped quartz glass is formed by sintering the doped intermediate product, wherein at least part of the particles of the doping material or the particles of the precursor substance of the same is generated in the suspension as a precipitate of a pH-value-controlled precipitation reaction of the initial compound.Type: ApplicationFiled: September 18, 2008Publication date: October 7, 2010Applicants: HERAEUS QUARZGLAS GMBH & CO. KG, INSTITUT FUER PHOTONISCHE TECHNOLOGIEN E.V.Inventors: Andreas Langner, Thomas Kayser, Gerhard Schoetz, Mario Such, Johannes Kirchhof, Stephan Grimm, Volker Reichel
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Publication number: 20100152077Abstract: A process for replacing the continuous phase of a nanoparticle dispersion with a less polar phase, includes filtering the dispersion through a semi-permeable membrane filter to remove the continuous phase, and introducing a less polar phase.Type: ApplicationFiled: August 28, 2009Publication date: June 17, 2010Applicant: Cerion Technology Inc.Inventors: Thomas D. Allston, Laura M. Herder, Andreas Langner, Kenneth J. Reed