Patents by Inventor Stefan Risse
Stefan Risse 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: 11971605Abstract: A mirror support for an optical mirror and a method for producing an optical mirror are disclosed. In an embodiment a mirror support includes a mirror body comprising a diamond particle reinforced aluminum composite material and a polishing layer arranged on the mirror body, wherein a content of diamond particles in the aluminum composite material is between 5% by mass and 50% by mass inclusive and is selected such that a thermal coefficient of linear expansion of the mirror body is adapted to a thermal coefficient of linear expansion of the polishing layer.Type: GrantFiled: May 8, 2019Date of Patent: April 30, 2024Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Jan Kinast, Stefan Risse
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Patent number: 11187881Abstract: A method and a device for producing an optical component having at least three monolithically arranged optical functional surfaces and an optical component are disclosed.Type: GrantFiled: November 29, 2016Date of Patent: November 30, 2021Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität JenaInventors: Matthias Beier, Johannes Hartung, Christoph Damm, Stefan Risse, Britta Satzer
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Publication number: 20210231912Abstract: A mirror support for an optical mirror and a method for producing an optical mirror are disclosed. In an embodiment a mirror support includes a mirror body comprising a diamond particle reinforced aluminum composite material and a polishing layer arranged on the mirror body, wherein a content of diamond particles in the aluminum composite material is between 5% by mass and 50% by mass inclusive and is selected such that a thermal coefficient of linear expansion of the mirror body is adapted to a thermal coefficient of linear expansion of the polishing layer.Type: ApplicationFiled: May 8, 2019Publication date: July 29, 2021Inventors: Jan Kinast, Stefan Risse
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Publication number: 20210220958Abstract: A method for manufacturing an optical system with an optical component made of a brittle-hard material is described, comprising the steps of; producing at least one optical functional surface at the optical component; mounting of the optical component on a processing machine and producing several reference surfaces and mounting surfaces at the optical component or at least one insert body permanently connected to the optical component by at least one machining tool of the processing machine; measuring the shape and position of the optical functional surface in a coordinate system related to the reference surfaces; performing a correction machining at least once, in which the shape and position deviation of the optical functional surface relative to the reference and mounting surfaces is reduced; and installation of the optical component in a housing structure of the optical system at the mounting surfaces.Type: ApplicationFiled: July 3, 2019Publication date: July 22, 2021Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.Inventors: Matthias BEIER, Stefan RISSE, Andreas GEBHARDT
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Publication number: 20190204571Abstract: A method and a device for producing an optical component having at least three monolithically arranged optical functional surfaces and an optical component are disclosed.Type: ApplicationFiled: November 29, 2016Publication date: July 4, 2019Applicants: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität Jena, Friedrich-Schiller-Universität JenaInventors: Matthias Beier, Johannes Hartung, Christoph Damm, Stefan Risse, Britta Satzer
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Patent number: 9599756Abstract: The invention relates to a method for manufacturing a light weight optical mirror or a monolithic mirror comprising at least one cooling channel, the method comprising forming a mirror body by iteratively depositing a metallic powder in layers and applying, for each of the layers, heat at least in a subarea of this layer, thereby fusing or sintering the powder in this subarea and bonding it to a previously deposited layer, the powder remaining in an unfused state in at least one region, the method further comprising forming at least one cavity within the carrier by removing the unfused powder from said region and producing a mirror surface at a closed surface of the mirror body. The invention further relates to an optical mirror and to an optical device.Type: GrantFiled: August 1, 2011Date of Patent: March 21, 2017Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Sebastian Scheiding, Andreas Gebhardt, Christoph Damm, Michael Scheiding, Stefan Risse
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Patent number: 9550696Abstract: The invention relates to a method of producing lightweight structural elements which are produced as a composition construction element having at least one cover plate and one carrier element which are connected to one another. A carrier element, at which at least one apertures and/or at least one cut-out is/are formed and at least one further element, which is a cover plate, are connected to one another. A carrier element and at least one cover plate can be formed from a glass, a glass ceramic material, a ceramic material and/or silicon having an oxide surface layer which is formed at least in the bonding region of the elements to be connected to one another. The carrier element should have at least a double thickness with respect to the thickness of a cover plate.Type: GrantFiled: February 9, 2012Date of Patent: January 24, 2017Assignee: FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWAANDTEN FORSCHUNG E.V.Inventors: Gerhard Kalkowski, Stefan Risse, Ramona Eberhardt
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Patent number: 9296161Abstract: The invention relates to a method for producing an optical assembly, comprising at least two optical functional surfaces arranged in a fixed positional relationship to one another on a common supporting structure, wherein by means of a processing machine, in various process steps, at least two optical functional surfaces and at least one reference structure having a defined and measurable relative position to the optical functional surfaces are produced. The supporting structure remains rigidly connected to the processing machine until said process steps have been completed, and wherein the optical functional surfaces are then measured relative to the at least one reference structure, and any deviation from a target shape and target position is determined, after which said process steps are repeated at least once with modified actuation of the processing machine. The invention further relates to an optical device comprising an optical assembly produced in this way and to a unit for carrying out such a method.Type: GrantFiled: September 13, 2010Date of Patent: March 29, 2016Assignees: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., Friedrich-Schiller-Universität JenaInventors: Sebastian Scheiding, Stefan Risse, Andreas Gebhardt, Christoph Damm, Thomas Peschel, Ralf Steinkopf
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Publication number: 20140247512Abstract: The invention relates to a method for manufacturing a light weight optical mirror or a monolithic mirror comprising at least one cooling channel, the method comprising forming a mirror body by iteratively depositing a metallic powder in layers and applying, for each of the layers, heat at least in a subarea of this layer, thereby fusing or sintering the powder in this subarea and bonding it to a previously deposited layer, the powder remaining in an unfused state in at least one region, the method further comprising forming at least one cavity within the carrier by removing the unfused powder from said region and producing a mirror surface at a closed surface of the mirror body. The invention further relates to an optical mirror and to an optical device.Type: ApplicationFiled: August 1, 2011Publication date: September 4, 2014Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.Inventors: Sebastian Scheiding, Andreas Gebhardt, Christoph Damm, Michael Scheiding, Stefan Risse
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Publication number: 20130327093Abstract: The invention relates to a method of producing lightweight structural elements which are produced as a composition construction element having at least one cover plate and one carrier element which are connected to one another. A carrier element, at which at least one apertures and/or at least one cut-out is/are formed and at least one further element, which is a cover plate, are connected to one another. A carrier element and at least one cover plate can be formed from a glass, a glass ceramic material, a ceramic material and/or silicon having an oxide surface layer which is formed at least in the bonding region of the elements to be connected to one another. The carrier element should have at least a double thickness with respect to the thickness of a cover plate.Type: ApplicationFiled: February 9, 2012Publication date: December 12, 2013Applicant: Fraunhofer Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.Inventors: Gerhard Kalkowski, Stefan Risse, Ramona Eberhardt
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Patent number: 8529130Abstract: A proposed aerostatic bearing arrangement for moving a device on a base structure, particularly in a vacuum environment, has at least one aerostatic bearing element comprising a bearing body having a load-carrying zone and a suction area. An electrostatic preloading unit having at least one electrode is associated with the at least one aerostatic bearing element, and a voltage can be applied to the electrode in such a way that a force component is generated in direction of the surface normal of the bearing body of the aerostatic bearing element.Type: GrantFiled: September 3, 2009Date of Patent: September 10, 2013Assignee: Vistec Electron Beam GmbHInventors: Gerhard Schubert, Christian Jackel, Ulf-Carsten Kirschstein, Michael Boehm, René Bauer, Gerd Harnisch, Thomas Peschel, Stefan Risse, Christoph Schenk
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Patent number: 8496221Abstract: A table system for vacuum application has a base plate and a moving table guided by aerostatic bearing units. The bearing units (10) are connected to supply lines and suction lines for supplying and extracting the gas required for the operation of the bearing units and are provided in each instance with a sealing system having at least one stage and comprising suction channel and sealing gap for sealing relative to the vacuum. The table system is characterized in that the aerostatic bearing units (10) are constructed at least partially as swivel joints, and a push rod (4) which is actuated by a drive (5) for guiding the moving table laterally is connected to the rotating part (21) of each swivel joint, and in that the push rods (4) are hollow and constitute a component part of the suction lines for extracting the operating gas.Type: GrantFiled: November 16, 2009Date of Patent: July 30, 2013Assignee: Vistec Electron Beam GmbHInventors: Gerhard Schubert, Christian Jackel, Ulf-Carsten Kirschstein, Michael Boehm, René Bauer, Gerd Harnisch, Thomas Peschel, Stefan Risse, Christoph Schenk
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Publication number: 20130057952Abstract: The invention relates to a substrate made of an aluminium-silicon alloy or crystalline silicon to which a polishable layer is applied and also to a metal mirror which comprises this substrate. Furthermore, the invention relates to a method for the production of metal mirrors and also the use of the metal mirror according to the invention.Type: ApplicationFiled: September 9, 2010Publication date: March 7, 2013Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Stefan Risse, Andreas Gebhardt, Thomas Peschel, Wieland Stockl
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Patent number: 8274640Abstract: Flexibly deformable holding elements operate such that substrates can be held in a fixed manner at a surface of the holding element electrostatically or also by use of negative pressure and planar positional deviations or unwanted deformations can be compensated simply and reliably, where at least one cut-out having an opening arranged at the rear side is formed at the rear side of the holding element which is disposed opposite the surface, and an actuator is arranged there exerting compressive forces or pulling forces for a widening or narrowing of the cut-out and/or for a deformation of the holding element.Type: GrantFiled: September 23, 2009Date of Patent: September 25, 2012Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Stefan Risse, Thomas Peschel, Christoph Damm
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Publication number: 20120236400Abstract: The invention relates to a method for producing an optical assembly, comprising at least two optical functional surfaces arranged in a fixed positional relationship to one another on a common supporting structure, wherein by means of a processing machine, in various process steps, at least two optical functional surfaces and at least one reference structure having a defined and measurable relative position to the optical functional surfaces are produced. The supporting structure remains rigidly connected to the processing machine until said process steps have been completed, and wherein the optical functional surfaces are then measured relative to the at least one reference structure, and any deviation from a target shape and target position is determined, after which said process steps are repeated at least once with modified actuation of the processing machine. The invention further relates to an optical device comprising an optical assembly produced in this way and to a unit for carrying out such a method.Type: ApplicationFiled: September 13, 2010Publication date: September 20, 2012Applicant: Friedrich-Schiller-Universitat JenaInventors: Sebastian Scheiding, Stefan Risse, Andreas Gebhardt, Christoph Damm, Thomas Peschel, Ralf Steinkopf
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Patent number: 8267582Abstract: A table for vacuum application which is guided by aerostatic bearing elements, having a fixedly mounted supporting structure and a tabletop which is displaceable in x-direction and y-direction with respect to the fixedly mounted supporting structure by means of slides. The slides are provided with the aerostatic bearing elements for guiding, these aerostatic bearing elements being connected to feed lines for supplying the gas required for the operation of the gas bearings and suction lines for removing this gas. The suction lines comprise at least one variable-length line arrangement having a first pipe member and a second pipe member which penetrate one inside the other without contacting, at least one sealing gap being provided between the pipe members.Type: GrantFiled: April 10, 2009Date of Patent: September 18, 2012Assignee: Vistec Electron Beam GmbHInventors: Gerhard Schubert, Christian Jackel, Ulf-Carsten Kirschstein, Michael Boehm, René Bauer, Gerd Harnisch, Thomas Peschel, Stefan Risse, Christoph Schenk
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Patent number: 7896913Abstract: The invention relates to an anchoring system for heart valve prostheses which can be implanted by introduction via the aorta without any major surgical operation. With the heart valve prosthesis according to the invention it shall be achieved that this can be safely and quickly guided through the aorta toward the heart, and can be fixed there. With this, hook-shaped elements are secured to the commissures of the heart valve prosthesis the hooks of which are guided in an outward direction through the heart valve prosthesis material.Type: GrantFiled: September 5, 2006Date of Patent: March 1, 2011Assignee: JenaValve Technology, Inc.Inventors: Christoph Damm, Carsten Weber, Stefan Risse, Volker Guyenot, Matthias Mohaupt, Gerd Harnisch, Peggy Dorrer, Markus Ferrari, Klaus Lang, Hans-Reiner Figulla
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Publication number: 20100265485Abstract: Flexibly deformable holding elements operate such that substrates can be held in a fixed manner at a surface of the holding element electrostatically or also by means of negative pressure and planar positional deviations or unwanted deformations can be compensated simply and reliably, where at least one cut-out having an opening arranged at the rear side is formed at the rear side of the holding element which is disposed opposite the surface, and an actuator is arranged there exerting compressive forces or pulling forces for a widening or narrowing of the cut-out and/or for a deformation of the holding element.Type: ApplicationFiled: September 23, 2009Publication date: October 21, 2010Applicant: Frauhofer-Gesellschaft zur Forderung der angewandten Forschung e.V.Inventors: Gerhard Kalkowski, Stefan Risse, Thomas Peschel, Christoph Damm
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Publication number: 20100122603Abstract: A table system for vacuum application has a base plate and a moving table guided by aerostatic bearing units. The bearing units (10) are connected to supply lines and suction lines for supplying and extracting the gas required for the operation of the bearing units and are provided in each instance with a sealing system having at least one stage and comprising suction channel and sealing gap for sealing relative to the vacuum. The table system is characterized in that the aerostatic bearing units (10) are constructed at least partially as swivel joints, and a push rod (4) which is actuated by a drive (5) for guiding the moving table laterally is connected to the rotating part (21) of each swivel joint, and in that the push rods (4) are hollow and constitute a component part of the suction lines for extracting the operating gas.Type: ApplicationFiled: November 16, 2009Publication date: May 20, 2010Applicant: VISTEC ELECTRON BEAM GMBHInventors: Gerhard Schubert, Christian Jackel, Ulf-Carsten Kirschstein, Michael Boehm, René Bauer, Gerd Harnisch, Thomas Peschel, Stefan Risse, Christoph Schenk
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Publication number: 20100061667Abstract: A proposed aerostatic bearing arrangement for moving a device on a base structure, particularly in a vacuum environment, has at least one aerostatic bearing element comprising a bearing body having a load-carrying zone and a suction area. An electrostatic preloading unit having at least one electrode is associated with the at least one aerostatic bearing element, and a voltage can be applied to the electrode in such a way that a force component is generated in direction of the surface normal of the bearing body of the aerostatic bearing element.Type: ApplicationFiled: September 3, 2009Publication date: March 11, 2010Applicant: VISTEC ELECTRON BEAM GMBHInventors: Gerhard Schubert, Christian Jackel, Ulf-Carsten Kirschstein, Michael Boehm, René Bauer, Gerd Harnisch, Thomas Peschel, Stefan Risse, Christoph Schenk