Patents Assigned to Universitat Hannover
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Patent number: 11867713Abstract: An optomechanical inertial reference mirror combines an optomechanical resonator with a reflector that serves as an inertial reference for an atom interferometer. The optomechanical resonator is optically monitored to obtain a first inertial measurement of the reflector that features high bandwidth and high dynamic range. The atom interferometer generates a second inertial measurement of the reflector that features high accuracy and stability. The second inertial measurement corrects for drift of the first inertial measurement, thereby resulting in a single inertial measurement of the reflector having high bandwidth, high dynamic range, excellent long-term stability, and high accuracy. The reflector may be bonded to the resonator, or formed directly onto a test mass of the resonator. With a volume of less than one cubic centimeter, the optomechanical inertial reference mirror is particularly advantageous for portable atomic-based sensors and systems.Type: GrantFiled: February 15, 2020Date of Patent: January 9, 2024Assignees: Arizona Board of Regents on Behalf of The University of Arizona, Leibniz Universität HannoverInventors: Felipe Guzmán, Ernst Maria Rasel, Dennis Schlippert
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Publication number: 20210164939Abstract: The invention relates to an ion mobility spectrometer which has at least a first drift chamber and a first switchable ion gate for the controlled transfer of ions into the first drift chamber, wherein: —the first ion gate is designed as a field switching ion gate having at least a first counter electrode and a first injection electrode; wherein—a first ionization chamber is formed between the first counter electrode and the first injection electrode, into which first ionization chamber ions to be analyzed by ion mobility spectrometry can be fed from an ionization source. The invention also relates to an ion mobility spectrometer which has at least a first drift chamber and a first switchable ion gate for the controlled transfer of ions into the first drift chamber and a second drift chamber separated from the first drift chamber and a second switchable ion gate for the controlled transfer of ions into the second drift chamber.Type: ApplicationFiled: April 3, 2019Publication date: June 3, 2021Applicant: Gottfried Wilhelm Leibniz Universität HannoverInventors: Stefan ZIMMERMANN, Ansgar KIRK, André AHRENS, Moritz HITZEMANN, Martin LIPPMANN
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Patent number: 9458200Abstract: The present invention relates to the use of particular macrocycles that are inhibitors of the proteasomic degradation of p27, in particular argyrin and derivatives thereof, for a treatment in a variety of conditions, such as the induction of immunotolerance, autoimmune diseases, bacterial infections, and proliferative diseases, such as cancers.Type: GrantFiled: June 23, 2009Date of Patent: October 4, 2016Assignees: Gottfried Wilhelm Leibniz Universität Hannover, Medizinische Hochschule Hannover, Helmholtz-Zentrum für Infektionsforschung GmbHInventors: Markus Kalesse, Nisar Malek, Ronald Frank, Tobias Brodmann, Leila Bülow, Andreas Rentsch, Anna-Katharina Girbig, Ulrike Eggert
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Patent number: 9419559Abstract: The invention relates to a parametric oscillator (1) for generating ultra-short pulses. The system (1) comprises a resonator (10) having an optical axis (11), an amplifier crystal (9) arranged in the resonator (10), and a pump laser system (4) for generating pump laser radiation (5) comprising pump photons, said pump laser radiation being directed onto the amplifier crystal (9). The invention is characterized in that the amplifier crystal (9) is an optically non-linear crystal configured for generating a signal photon and an idler photon from a pump photon by means of an optical-parametric process, wherein the resonator (10) is arranged in such a way that a signal pulse formed from the signal photons leaves the amplifier crystal (9) along the optical axis (11) of the resonator (10), and wherein dispersion compensation members for at least partially compensating the dispersion of the radiation circulating in the resonator (10) are provided.Type: GrantFiled: April 18, 2011Date of Patent: August 16, 2016Assignee: Gottfried Wilhelm Leibniz Universitat HannoverInventors: Uwe Morgner, Stefan Rausch, Thomas Binhammer
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Patent number: 8502815Abstract: We present a method for predictive compression of time-consistent 3D mesh sequences supporting and exploiting scalability. The applied method decomposes each frame of a mesh sequence in layers, which provides a time-consistent multi-resolution representation. Following the predictive coding paradigm, local temporal and spatial dependencies between layers and frames are exploited for layer-wise compression. Prediction is performed vertex-wise from coarse to fine layers exploiting the motion of already encoded neighboring vertices for prediction of the current vertex location. Consequently, successive layer-wise decoding allows to reconstruct frames with increasing levels of detail.Type: GrantFiled: April 18, 2008Date of Patent: August 6, 2013Assignee: Gottfried Wilhelm Leibniz Universitat HannoverInventors: Nikolce Stefanoski, Jörn Ostermann, Patrick Klie
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Publication number: 20130127553Abstract: The invention relates to a parametric oscillator (1) for generating ultra-short pulses. The system (1) comprises a resonator (10) having an optical axis (11), an amplifier crystal (9) arranged in the resonator (10), and a pump laser system (4) for generating pump laser radiation (5) comprising pump photons, said pump laser radiation being directed onto the amplifier crystal (9). The invention is characterized in that the amplifier crystal (9) is an optically non-linear crystal configured for generating a signal photon and an idler photon from a pump photon by means of an optical-parametric process, wherein the resonator (10) is arranged in such a way that a signal pulse formed from the signal photons leaves the amplifier crystal (9) along the optical axis (11) of the resonator (10), and wherein dispersion compensation members for at least partially compensating the dispersion of the radiation circulating in the resonator (10) are provided.Type: ApplicationFiled: April 18, 2011Publication date: May 23, 2013Applicant: Gottfried Wilhelm Leibniz Universitat HannoverInventors: Uwe Morgner, Stefan Rausch, Thomas Binhammer
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Patent number: 8010210Abstract: The present invention provides an apparatus for insertion of a flexible implant into a body section of an implant recipient, the apparatus comprising an elongate guiding section having a longitudinal axis and an inner volume for removably receiving the implant, an elongate first receiving member connected at its first end to a first actuator arranged for moving the first receiving member within the guiding section in parallel to the axis of the guiding section, a first control device for controlling the actuation of the first actuator, wherein first receiving member at its second end opposite its first end carries a gripping unit for releasably gripping a proximal end of the implant, a second actuator for controlling the configuration of the implant, and a second control device for controlling the actuation of the second actuator.Type: GrantFiled: October 2, 2008Date of Patent: August 30, 2011Assignees: Medizinische Hochschule Hannover, Leibniz Universitat HannoverInventors: Thomas Stephan Rau, Andreas Hussong, Omid Majdani, Martin Leinung, Thomas Lenarz, Hubertus Eilers, Stephan Baron
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Patent number: 7264671Abstract: The present invention relates to particles or powders of a compound of formula Zn1?yMyO1?xSx, wherein x has a value in the range from 0.01 to 0.08, M represents a divalent metal and y has a value in the range from 0 to 0.2, the compound having a wurtzite structure.Type: GrantFiled: April 4, 2006Date of Patent: September 4, 2007Assignee: Universitat HannoverInventors: Michael Binnewies, Sonja Locmelis
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Patent number: 6583914Abstract: The invention relates to a device for scanning an object using a scanning beam which is directed into a rotating deflector and which is diverted onto the object at a controllable diversion angle using a diverting unit that is arranged in a moveable manner. The diversion angle of the diverting unit is adjusted according to the centrifugal force acting upon said diverting unit and according to the rotational speed of the deflector.Type: GrantFiled: August 13, 2001Date of Patent: June 24, 2003Assignee: Universitat HannoverInventors: Eckart Müller, Ulf Kruse
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Patent number: 6569469Abstract: The invention relates to a method for producing an antioxidatively active extract which can be used in particular for stabilizing foodstuffs and cosmetic agents. According to the method, non-enzymatically browned grain germs, or a mixture containing non-enzymatically browned grain germs, is/are extracted using a solvent or solvent mixture (e.g. ethanol or an ethanolic mixture) having an ETN value ranging from 0.6 to 0.8, and the extracting agent is then optionally separated off. The invention also relates to a method for stabilizing unbrowned grain germs in which these unbrowned grain germs are mixed with non-enzymatically browned grain germs.Type: GrantFiled: March 14, 2001Date of Patent: May 27, 2003Assignee: Universität HannoverInventors: Yasser El Saharty, Ulrich Krings, Ralf Günther Berger