Patents by Inventor Wulf GRAEHLERT
Wulf GRAEHLERT 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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Publication number: 20230003660Abstract: In the method for optical monitoring and/or determination of properties on samples, monochromatic electromagnetic radiation with a predetermined wavelength is sequentially directed from several radiation sources onto a sample influenced by an electronic evaluation unit. The respective intensity specific to the wavelength of the electromagnetic radiation scattered and/or reflected by the sample is detected by at least one detector and fed to the electronic evaluation unit for spectrally resolved evaluation in order to use it to monitor and/or determine properties of the respective sample.Type: ApplicationFiled: June 29, 2022Publication date: January 5, 2023Inventors: Peter Hartmann, Tobias Baselt, Wulf Grählert, Oliver Throl, Philipp Wollmann
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Publication number: 20210318243Abstract: A device for detecting or evaluating articles or products, irradiated by a laser beam, for generation of Raman or fluorescence radiation on surfaces of them, and generated radiation is directed to a detector array designed for locally resolved detection of the radiation. Monochromatic electromagnetic radiation with no influence on Raman or fluorescence radiation is directed at the articles or products. Detectors detect radiation reflected or scattered by articles or products in a locally resolved manner. An optical filter or beam splitter is arranged between articles or products and detector array. Irradiation and detection are carried out during relative movement between articles or products, focal range of the laser beam, diodes emitting electromagnetic radiation and detectors of the detector array. Detectors are connected to an electronic evaluation unit designed for locally and spectrally resolved evaluation of detected intensities of Raman or fluorescence radiation and for image analysis.Type: ApplicationFiled: June 14, 2019Publication date: October 14, 2021Applicant: Fraunhofer-Gesellschaft zur Foerderung Der Angewandten ForschungInventors: Philipp WOLLMANN, Wulf GRAEHLERT, Florian GRUBER
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Patent number: 11041798Abstract: In the arrangement for determining the achievable adhesive strength before forming a connection having material continuity to a surface of a joining partner, a plurality of detectors are present and arranged that are configured for a spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval and are connected to an electronic evaluation unit. They can detect radiation emitted from a broadband radiation source of a reflection incident on the surface of one of the joining partners, and/or after passing through joining partners transparent for the electromagnetic radiation on the detectors. A laterally and temporally homogeneous intensity of the electromagnetic radiation should be observed in this respect. The joining partner is formed from a material that does not 100% absorb the respective electromagnetic radiation and thus a transmission and/or reflection is possible.Type: GrantFiled: August 31, 2016Date of Patent: June 22, 2021Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Florian Gruber, Wulf Graehlert, Philipp Wollmann
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Patent number: 10605712Abstract: The invention relates to an assembly for determining the permeation rate of a sample for at least one permeate, in particular water vapor, wherein multiple detectors are arranged in a row or in a row and column arrangement for the spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval. The detectors are connected to an electronic evaluation unit and are arranged such that electromagnetic radiation emitted from a broadband radiation source is incident on the detectors either after being reflected by the surface of the sample, by a layer formed on the sample, or by the surface of a layer within the sample, and/or after passing through a sample which is transparent to the electromagnetic radiation. The irradiation is carried out such that a homogeneous intensity of the electromagnetic radiation is maintained on a surface, by means of which the electromagnetic radiation is reflected or through which the radiation is transmitted.Type: GrantFiled: July 18, 2016Date of Patent: March 31, 2020Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG ANGEWANDTEN FORSCHUNG E.V.Inventors: Philipp Wollmann, Wulf Graehlert, Florian Gruber
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Patent number: 10466274Abstract: An arrangement for a spatially resolved determination of the specific electrical resistance and/or of the specific electrical conductivity of a sample at different positions, in which a plurality of detectors are configured for a spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval and is incident onto the detectors. A radiation onto a surface takes place with homogeneous intensity.Type: GrantFiled: March 2, 2016Date of Patent: November 5, 2019Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Philipp Wollmann, Wulf Graehlert, Eric Weissenborn
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Publication number: 20190178777Abstract: The invention relates to an assembly for determining the permeation rate of a sample for at least one permeate, in particular water vapor, wherein multiple detectors are arranged in a row or in a row and column arrangement for the spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval. The detectors are connected to an electronic evaluation unit and are arranged such that electromagnetic radiation emitted from a broadband radiation source is incident on the detectors either after being reflected by the surface of the sample, by a layer formed on the sample, or by the surface of a layer within the sample, and/or after passing through a sample which is transparent to the electromagnetic radiation. The irradiation is carried out such that a homogeneous intensity of the electromagnetic radiation is maintained on a surface, by means of which the electromagnetic radiation is reflected or through which the radiation is transmitted.Type: ApplicationFiled: July 18, 2016Publication date: June 13, 2019Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Philipp WOLLMANN, Wulf GRAEHLERT, Florian GRUBER
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Patent number: 10228329Abstract: An arrangement for determining characteristics or parameters of a sample, or a layer formed on or in the sample, has detectors, spatially resolving spectral analysis of electromagnetic radiation within a wavelength interval, provided in rows or in a row and column arrangement, whereby electromagnetic radiation emitted from a broadband radiation source is incident on the detectors after reflecting off, and/or passing through, the sample, or layer formed on or in the sample, upon which is observed a homogeneous intensity of the electromagnetic radiation, and an electronic evaluation unit connected to the detectors compares the spatially-resolved and wavelength-resolved signals detected by the detectors with a theoretical wavelength dependent progression of the respective radiation intensities obtained through simulation or with a progression obtained by calibration on a known sample, in order to obtain information for the measurement position detected, and determine the spatially-resolved distribution of the chType: GrantFiled: June 22, 2015Date of Patent: March 12, 2019Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG ANGEWANDETEN FORSCHUNG B.V.Inventors: Wulf Graehlert, Philipp Wollmann, Florian Gruber
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Publication number: 20180180528Abstract: In the arrangement for determining the achievable adhesive strength before forming a connection having material continuity to a surface of a joining partner, a plurality of detectors are present and arranged that are configured for a spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval and are connected to an electronic evaluation unit. They can detect radiation emitted from a broadband radiation source of a reflection incident on the surface of one of the joining partners, and/or after passing through joining partners transparent for the electromagnetic radiation on the detectors. A laterally and temporally homogeneous intensity of the electromagnetic radiation should be observed in this respect. The joining partner is formed from a material that does not 100% absorb the respective electromagnetic radiation and thus a transmission and/or reflection is possible.Type: ApplicationFiled: August 31, 2016Publication date: June 28, 2018Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Florian GRUBER, Wulf GRAEHLERT, Philipp WOLLMANN
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Publication number: 20180045758Abstract: An arrangement for a spatially resolved determination of the specific electrical resistance and/or of the specific electrical conductivity of a sample at different positions, in which a plurality of detectors are configured for a spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval and is incident onto the detectors. A radiation onto a surface takes place with homogeneous intensity.Type: ApplicationFiled: March 2, 2016Publication date: February 15, 2018Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Philipp WOLLMANN, Wulf GRAEHLERT, Eric WEISSENBORN
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Publication number: 20170212056Abstract: The invention relates to an arrangement for determining properties and/or parameters of a sample and/or of at least one film formed on a surface of a sample. In this respect, a plurality of detectors are arranged in a row arrangement or in a row and column arrangement and are configured for the spatially resolved spectral analysis of electromagnetic radiation within a wavelength interval. The detectors are connected to an electronic evaluation unit and are arranged such that electromagnetic radiation emitted by a broadband radiation source is incident onto the detectors either after a reflection at the surface of the sample or at a film formed on the sample or at the surface of a film within the sample and/or after passing through a sample transparent to the electromagnetic radiation. The irradiation takes place such that a homogenous intensity of the electromagnetic radiation is observed on a surface from which the electromagnetic radiation is reflected or is transmitted by the surface.Type: ApplicationFiled: June 22, 2015Publication date: July 27, 2017Applicant: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG ANGEWANDTEN FORSCHUNG E.V.Inventors: Wulf GRAEHLERT, Philipp WOLLMANN, Florian GRUBER
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Patent number: 9470615Abstract: A method and an apparatus for determining the permeation rate of barrier materials, with which in a measuring chamber (8.7) which has at least two shut-off elements (81; 8.2) for opening and closing, a concentration of at least one permeate is determined which, present as a test gas with a constant concentration in a test gas chamber (8.3), is permeated into the measuring chamber (8.7) through a barrier element (8.5) which is arranged between the test gas chamber (8.3) and the measuring chamber (8.7) and which has a known permeable surface (A).Type: GrantFiled: February 12, 2014Date of Patent: October 18, 2016Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Wulf Graehlert, Harald Beese
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Device and method for determining the permeation rate of barrier elements and ultra-barrier elements
Patent number: 9261451Abstract: The invention relates to a method and a device for determining the permeation rate of barrier elements and ultra-barrier elements according to an isostatic permeation measurement method. In the process, the convective mass transfer of a permeate permeated through a barrier element is replaced by a diffusion-controlled mass transfer along a diffusion path in a subsequently arranged measurement chamber with a hollow conducting element and permeate sink. The permeate sink ensures that permeate is removed continuously, and so a mass flux equilibrium of the permeate is set through the barrier element and through the diffusion path. The concentration gradient of the permeate and, from this, the permeation rate of the barrier element is then determined by non-invasive determination of the concentration of the permeate along the diffusion path.Type: GrantFiled: May 28, 2013Date of Patent: February 16, 2016Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Harald Beese, Wulf Graehlert, Stefan Kaskel -
Publication number: 20140223999Abstract: A method and an apparatus for determining the permeation rate of barrier materials, with which in a measuring chamber (8.7) which has at least two shut-off elements (81; 8.2) for opening and closing, a concentration of at least one permeate is determined which, present as a test gas with a constant concentration in a test gas chamber (8.3), is permeated into the measuring chamber (8.7) through a barrier element (8.5) which is arranged between the test gas chamber (8.3) and the measuring chamber (8.7) and which has a known permeable surface (A).Type: ApplicationFiled: February 12, 2014Publication date: August 14, 2014Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Wulf GRAEHLERT, Harald BEESE
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DEVICE AND METHOD FOR DETERMINING THE PERMEATION RATE OF BARRIER ELEMENTS AND ULTRA-BARRIER ELEMENTS
Publication number: 20130312491Abstract: The invention relates to a method and a device for determining the permeation rate of barrier elements and ultra-barrier elements according to an isostatic permeation measurement method. In the process, the convective mass transfer of a permeate permeated through a barrier element is replaced by a diffusion-controlled mass transfer along a diffusion path in a subsequently arranged measurement chamber with a hollow conducting element and permeate sink. The permeate sink ensures that permeate is removed continuously, and so a mass flux equilibrium of the permeate is set through the barrier element and through the diffusion path. The concentration gradient of the permeate and, from this, the permeation rate of the barrier element is then determined by non-invasive determination of the concentration of the permeate along the diffusion path.Type: ApplicationFiled: May 28, 2013Publication date: November 28, 2013Applicant: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Harald BEESE, Wulf GRAEHLERT, Stefan KASKEL -
Patent number: 7525664Abstract: The invention relates to a device and a method for the optical detection of substances contained in exhaust gases of chemical processes, wherein exhaust gases are conducted all the way through a channel element that forms an optical measuring section; at the channel element there are two flanges, closed off to the ambient area, and at least one window element through which electromagnetic radiation for the optical detection can be directed from a radiation source to a optical detector through the channel element; a purge gas is fed through the flanges into the channel element, whereby with a purge gas led into one of the flanges a closed laminar purge gas flow is to be formed in the bottom area of the interior of the channel element.Type: GrantFiled: May 27, 2005Date of Patent: April 28, 2009Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung E.V.Inventors: Ines Dani, Wulf Grählert, Volkmar Hopfe, Gerrit Mäder