Patents by Inventor Joachim Janes
Joachim Janes 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: 11867916Abstract: The disclosure relates to an apparatus device for projecting an image on the retina of an eye with a laser projection device, a device for determining the orientation of the eye, and with a tracking unit for tracking the laser beam of the laser projection device according to the determined orientation.Type: GrantFiled: June 19, 2019Date of Patent: January 9, 2024Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Joachim Janes, Ulrich Hofmann
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Publication number: 20220197042Abstract: The invention relates to an image generating device having a radiation source for one or more output beams having Gaussian radiation characteristic, in particular a laser beam source, having a device for generating Bessel-like beams from one or more output beams, having a controllably drivable MEMS scanner, wherein the Bessel-like beams are directed onto the MEMS scanner and are deliberately deflected by the MEMS scanner to generate an image, and having at least one display body at least partially transmissive to the Bessel-like beams, onto which the Bessel-like beams are guided by the MEMS scanner.Type: ApplicationFiled: May 13, 2020Publication date: June 23, 2022Inventors: Ulrich HOFMANN, Joachim JANES
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Publication number: 20210231963Abstract: The disclosure relates to an apparatus device for projecting an image on the retina of an eye with a laser projection device, a device for determining the orientation of the eye, and with a tracking unit for tracking the laser beam of the laser projection device according to the determined orientation.Type: ApplicationFiled: June 19, 2019Publication date: July 29, 2021Inventors: Joachim Janes, Ulrich Hofmann
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Publication number: 20190310464Abstract: The invention relates to an image generation device comprising a laser light source (1); a mirror assembly having two parabolic mirrors (3, 6) via which a scanning light beam (1a, 5) generated by the laser light source is directed onto a sample surface (9); a deflection device (2), in particular a micromirror scanner, which is controllable such that the scanning light beam (1a, 5) scans points of the sample surface in a targeted manner; and a detector (10) which detects radiation emanating from a scanned point of the sample surface. The spatial resolution of the image generation device is substantially defined by the narrowest possible focusing of the laser beam, and the accuracy of the adjustable deflection angle is defined by the micromirror scanner.Type: ApplicationFiled: November 9, 2017Publication date: October 10, 2019Inventors: Joachim Janes, Thorsten Giese
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Patent number: 10101222Abstract: Embodiments of the present invention provide an apparatus including a micromirror, an excitation structure containing or supporting the micromirror, and at least one piezoelectric sensor. The excitation structure includes at least one piezoelectric actuator, the excitation structure being configured to resonantly excite the micromirror so as to cause a deflection of the micromirror. The at least one piezoelectric sensor is configured to provide a sensor signal dependent on the deflection of the micromirror, the piezoelectric sensor being connected to the excitation structure so that during the resonant excitation of the micromirror, the sensor signal and the deflection of the micromirror exhibit a fixed mutual phase relationship.Type: GrantFiled: September 4, 2015Date of Patent: October 16, 2018Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Shanshan Gu-Stoppel, Hans-Joachim Quenzer, Joachim Janes, Felix Heinrich
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Patent number: 10041837Abstract: The present invention relates to a radiation imaging sensor with at least one detection element, which is implemented on a substrate as a micromechanical resonator and which absorbs the radiation to be detected. The resonator is set into a resonant oscillation with an excitation device and a shift in the resonance frequency of the detection element under exposure to radiation is detected with a detection device. The radiation sensor is characterized by the fact that it comprises a scanning device with a single-axis or multi-axis tiltable scanning element. The facility to tilt the device means that the detection element can be used to detect radiation from different directions. The imaging sensor can be realized in a compact manner and be economically produced.Type: GrantFiled: November 19, 2014Date of Patent: August 7, 2018Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Ulrich Hofmann, Manfred Weiss, Joachim Janes, Frank Senger
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Patent number: 9832434Abstract: A method for activating a deflection device comprising at least one deflection unit, for a projection device for projecting trajectories upon a projection surface, wherein the deflection device deflects electromagnetic radiation which is directed upon it, for producing trajectories, and the at least one deflection unit is activated by way of an activation signal delivered from a control device, for producing oscillations in each case with a turning amplitude at a direction change of the oscillation, about at least one deflection axis, wherein in the case of resonance, the oscillations have a maximal amplitude, at which the produced trajectories reach an edge of the projection surface.Type: GrantFiled: September 29, 2015Date of Patent: November 28, 2017Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Ulrich Hofmann, Frank Senger, Thomas von Wantoch, Christian Mallas, Joachim Janes, Manfred Weiss
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Patent number: 9753280Abstract: What is proposed is: a micromirror arrangement which comprises: a first spring-mass oscillator, which has an oscillatory body forming a mirror plate (1) and first spring elements (2); a second spring-mass oscillator, which has a drive plate (3) and second spring elements (4) and which is connected to a carrier arrangement (5, 8, 9) via the second spring elements (4), wherein the first spring-mass oscillator is suspended in the second spring-mass oscillator via the first spring elements (2); and a drive arrangement (11), which is assigned to the drive plate and is designed to cause the drive plate (3) to oscillate.Type: GrantFiled: November 24, 2014Date of Patent: September 5, 2017Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.Inventors: Ulrich Hofmann, Frank Senger, Thomas von Wantoch, Christian Mallas, Joachim Janes
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Patent number: 9733470Abstract: The underlying invention presents a device which connects a vibratably suspended optical element to at least two actuators mounted fixedly on one side via curved spring elements, wherein the actuators are implemented to cause the vibratably suspended optical element to vibrate via the curved spring elements. Both the actuators and the entire system may be implemented to be more robust and be operated more reliably due to the curved shaping of the spring elements.Type: GrantFiled: May 16, 2014Date of Patent: August 15, 2017Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.Inventors: Shanshan Gu-Stoppel, Hans Joachim Quenzer, Joachim Janes
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Patent number: 9523848Abstract: A micromirror system that includes a chip frame, at least one spring element, and at least one mirror plate oscillatorily suspended in the chip frame via the at least one spring element. The chip frame and the at least one spring element include at least one microchannel which is provided with an inlet opening and an outlet opening for leading through a flowing coolant.Type: GrantFiled: March 20, 2013Date of Patent: December 20, 2016Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E. V.Inventors: Ulrich Hofmann, Hans-Joachim Quenzer, Joachim Janes, Björn Jensen
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Publication number: 20160299335Abstract: What is proposed is: a micromirror arrangement which comprises: a first spring-mass oscillator, which has an oscillatory body forming a mirror plate (1) and first spring elements (2); a second spring-mass oscillator, which has a drive plate (3) and second spring elements (4) and which is connected to a carrier arrangement (5, 8, 9) via the second spring elements (4), wherein the first spring-mass oscillator is suspended in the second spring-mass oscillator via the first spring elements (2); and a drive arrangement (11), which is assigned to the drive plate and is designed to cause the drive plate (3) to oscillate.Type: ApplicationFiled: November 24, 2014Publication date: October 13, 2016Inventors: Ulrich Hofmann, Frank Senger, Thomas von Wantoch, Christian Mallas, Joachim Janes
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Publication number: 20160100139Abstract: A method for activating a deflection device comprising at least one deflection unit, for a projection device for projecting trajectories upon a projection surface, wherein the deflection device deflects electromagnetic radiation which is directed upon it, for producing trajectories, and the at least one deflection unit is activated by way of an activation signal delivered from a control device, for producing oscillations in each case with a turning amplitude at a direction change of the oscillation, about at least one deflection axis, wherein in the case of resonance, the oscillations have a maximal amplitude, at which the produced trajectories reach an edge of the projection surface.Type: ApplicationFiled: September 29, 2015Publication date: April 7, 2016Inventors: Ulrich Hofmann, Frank Senger, Thomas von Wantoch, Christian Mallas, Joachim Janes, Manfred Weiss
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Publication number: 20160069754Abstract: Embodiments of the present invention provide an apparatus including a micromirror, an excitation structure containing or supporting the micromirror, and at least one piezoelectric sensor. The excitation structure includes at least one piezoelectric actuator, the excitation structure being configured to resonantly excite the micromirror so as to cause a deflection of the micromirror. The at least one piezoelectric sensor is configured to provide a sensor signal dependent on the deflection of the micromirror, the piezoelectric sensor being connected to the excitation structure so that during the resonant excitation of the micromirror, the sensor signal and the deflection of the micromirror exhibit a fixed mutual phase relationship.Type: ApplicationFiled: September 4, 2015Publication date: March 10, 2016Inventors: Shanshan GU-STOPPEL, Hans-Joachim QUENZER, Joachim JANES, Felix HEINRICH
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Patent number: 9151949Abstract: The invention relates to a deflection device for a projection apparatus for projecting Lissajous figures onto an observation field which is made to deflect a light beam about at least one first and one second deflection axis for generating Lissajous figures having a deflection unit for producing oscillations about the deflection axes and having a control apparatus for producing control signals for the deflection unit having a first and second control frequency which substantially corresponds to the resonant frequencies of the deflection unit, wherein the deflection unit has a quality factor of >3,000 and the control apparatus includes a feedback loop which is configured to regulate the first and/or second control frequencies in dependence on a measured phasing of the oscillations of the deflection unit so that the maximum amplitude of the oscillations remains in the resonant range of the deflection unit.Type: GrantFiled: December 13, 2010Date of Patent: October 6, 2015Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Ulrich Hofmann, Lars Ratzmann, Joachim Janes, Manfred Weiss, Sascha Mühlmann
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Patent number: 9054636Abstract: The invention relates to a micromechanical resonator arrangement, in particular micro-mirror scanner with an inner actuator, which comprises an oscillation body capable of oscillation about at least one axis, and with an outer actuator with an oscillating part. The inner and outer actuator form a coupled oscillation system, and the outer actuator is driven by an external drive whose drive frequency is selected in a manner such that the oscillation body of the inner actuator oscillates with one of its eigenmodes or close to this eigenmode. The inner actuator is at least one vacuum-encapsulated micro-actuator chip which is fastened on the oscillating part of the outer actuator.Type: GrantFiled: December 11, 2013Date of Patent: June 9, 2015Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Ulrich Hofmann, Joachim Janes
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Publication number: 20150144795Abstract: The present invention relates to a radiation imaging sensor with at least one detection element, which is implemented on a substrate as a micromechanical resonator and which absorbs the radiation to be detected. The resonator is set into a resonant oscillation with an excitation device and a shift in the resonance frequency of the detection element under exposure to radiation is detected with a detection device. The radiation sensor is characterized by the fact that it comprises a scanning device with a single-axis or multi-axis tiltable scanning element. The facility to tilt the device means that the detection element can be used to detect radiation from different directions. The imaging sensor can be realized in a compact manner and be economically produced.Type: ApplicationFiled: November 19, 2014Publication date: May 28, 2015Inventors: Ulrich Hofmann, Manfred Weiss, Joachim Janes, Frank Senger
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Publication number: 20150049374Abstract: A micromirror system that includes a chip frame, at least one spring element, and at least one mirror plate oscillatorily suspended in the chip frame via the at least one spring element. The chip frame and the at least one spring element include at least one microchannel which is provided with an inlet opening and an outlet opening for leading through a flowing coolant.Type: ApplicationFiled: March 20, 2013Publication date: February 19, 2015Inventors: Ulrich Hofmann, Hans-Joachim Quenzer, Joachim Janes, Björn Jensen
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Publication number: 20140340726Abstract: The underlying invention presents a device which connects a vibratably suspended optical element to at least two actuators mounted fixedly on one side via curved spring elements, wherein the actuators are implemented to cause the vibratably suspended optical element to vibrate via the curved spring elements. Both the actuators and the entire system may be implemented to be more robust and be operated more reliably due to the curved shaping of the spring elements.Type: ApplicationFiled: May 16, 2014Publication date: November 20, 2014Inventors: Shanshan GU-STOPPEL, Hans Joachim QUENZER, Joachim JANES
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Publication number: 20140159827Abstract: The invention relates to a micromechanical resonator arrangement, in particular micro-mirror scanner with an inner actuator, which comprises an oscillation body capable of oscillation about at least one axis, and with an outer actuator with an oscillating part. The inner and outer actuator form a coupled oscillation system, and the outer actuator is driven by an external drive whose drive frequency is selected in a manner such that the oscillation body of the inner actuator oscillates with one of its eigenmodes or close to this eigenmode. The inner actuator is at least one vacuum-encapsulated micro-actuator chip which is fastened on the oscillating part of the outer actuator.Type: ApplicationFiled: December 11, 2013Publication date: June 12, 2014Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Ulrich Hofmann, Joachim Janes
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Publication number: 20120307211Abstract: The invention relates to a deflection device for a projection apparatus for projecting Lissajous figures onto an observation field which is made to deflect a light beam about at least one first and one second deflection axis for generating Lissajous figures having a deflection unit for producing oscillations about the deflection axes and having a control apparatus for producing control signals for the deflection unit having a first and second control frequency which substantially corresponds to the resonant frequencies of the deflection unit, wherein the deflection unit has a quality factor of >3,000 and the control apparatus includes a feedback loop which is configured to regulate the first and/or second control frequencies in dependence on a measured phasing of the oscillations of the deflection unit so that the maximum amplitude of the oscillations remains in the resonant range of the deflection unit.Type: ApplicationFiled: December 13, 2010Publication date: December 6, 2012Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.Inventors: Ulrich Hofmann, Lars Ratzmann, Joachim Janes, Manfred Weiss, Sascha Mühlmann