Patents by Inventor Svenja Knappe
Svenja Knappe 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: 11960247Abstract: According to some aspects of the present disclosure, an atomic clock and methods of forming and/or using an atomic clock are disclosed. In one embodiment, an atomic clock includes: a light source configured to illuminate a resonance vapor cell; a narrowband optical filter disposed between the light source and the resonance vapor cell and arranged such that light emitted from the light source passes through the narrowband optical filter and illuminates the resonance vapor cell. The resonance vapor cell is configured to emit a signal corresponding to a hyperfine transition frequency in response to illumination from the light source, and a filter cell is disposed between the light source and the resonance vapor cell and configured to generate optical pumping. An optical detector is configured to detect the emitted signal corresponding to the hyperfine transition frequency.Type: GrantFiled: May 15, 2023Date of Patent: April 16, 2024Assignee: The Regents of the University of Colorado, a body corporateInventors: Svenja Knappe, Sean Krzyzewski
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Publication number: 20230384737Abstract: According to some aspects of the present disclosure, an atomic clock and methods of forming and/or using an atomic clock are disclosed. In one embodiment, an atomic clock includes: a light source configured to illuminate a resonance vapor cell; a narrowband optical filter disposed between the light source and the resonance vapor cell and arranged such that light emitted from the light source passes through the narrowband optical filter and illuminates the resonance vapor cell. The resonance vapor cell is configured to emit a signal corresponding to a hyperfine transition frequency in response to illumination from the light source, and a filter cell is disposed between the light source and the resonance vapor cell and configured to generate optical pumping. An optical detector is configured to detect the emitted signal corresponding to the hyperfine transition frequency.Type: ApplicationFiled: May 15, 2023Publication date: November 30, 2023Inventors: Svenja Knappe, Sean Krzyzewski
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Publication number: 20230266407Abstract: Various embodiments disclosed herein comprise systems and methods to conform magnetic field sensors to a target geometry. In some examples, an apparatus is configured to conform to a target geometry. The apparatus comprises a sensor mount and a sensor array. The sensor mount comprises a flexible state for a first environmental condition and a rigid state for a second environmental condition. The sensor mount transitions from the flexible state to the rigid state when the first environmental condition transitions to the second environmental condition. The sensor mount transitions from the rigid state to the flexible state when the second environmental condition transitions to the first environmental condition. The sensor array is coupled to the sensor mount.Type: ApplicationFiled: February 23, 2023Publication date: August 24, 2023Inventors: Svenja Knappe, Orang Alem
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Publication number: 20230074561Abstract: Various embodiments disclosed herein comprise systems and methods to locate magnetic field sensors. In some examples, a system comprises a controller, a sensor mount, a coil set comprising one or more coils, and a magnetic field sensor. The sensor mount mounts the magnetic field sensor and constrains at least one degree of freedom of the magnetic field sensor in position or orientation. The controller supplies electric current to the coil set. The coil set generates magnetic waves that form at least one coil magnetic field in response to receiving the current. The magnetic field sensor measures the strength of the coil magnetic field. The controller locates the magnetic field sensor based on the constraint and the measured strength of the coil magnetic field.Type: ApplicationFiled: September 7, 2022Publication date: March 9, 2023Inventors: Aaron Park, Orang Alem, Svenja Knappe, Kendall D. Holloway
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Publication number: 20230060317Abstract: Various embodiments comprise systems and methods to model the shape of a target subject to coregister an image generated by an on-subject sensor array to the anatomy of the subject. In some examples, a system constrains sensors to follow the contour of the target subject. The system generates a surface contour representation of the target subject based on the locations of the individual ones of the sensors. The system fits the surface contour representation of the target subject to an outer surface feature of an anatomical scan.Type: ApplicationFiled: September 1, 2022Publication date: March 2, 2023Inventors: Orang Alem, Svenja Knappe
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Publication number: 20220399146Abstract: Various embodiments comprise a magnetic field compensation system. In some examples, the system comprises one or more coil drivers, magnetic field coils, and one or more magnetic field sensors. The one or more coil drivers supply a current to the magnetic field coils to generate a magnetic field. The magnetic field coils receive the current and generate the magnetic field. The magnetic field coils may be arranged in an array. The magnetic field coils individually comprise at least one coil trace pattern that encloses an area. The one or more magnetic field sensors measure the magnetic field generated by the magnetic field coils at a location proximate to the magnetic field coils.Type: ApplicationFiled: June 9, 2022Publication date: December 15, 2022Inventors: Kenneth J. Hughes, Svenja Knappe, Tyler L. Maydew, Orang Alem
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Publication number: 20220011386Abstract: Various embodiments of the present technology relate generally to the field of imaging the spatial distribution of magnetic field of biologic and non-biologic materials that may change over time and more particularly to the apparatus and methods for making such a static or dynamic spatial imaging of magnetic field distributions. Some embodiments provide for apparatus and methods for a novel magnetographic camera which enables a unique ability to determine the spatial distribution of magnetic field in a biological or non-biological sample with high spatial and temporal resolutions and high sensitivity. The use of these embodiments will greatly expand the applications of OPM-based cameras in medicine, science and industry.Type: ApplicationFiled: November 21, 2019Publication date: January 13, 2022Inventors: Svenja Knappe, Yoshio Okada, Sean Krzyzewski
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Publication number: 20220004150Abstract: According to some aspects of the present disclosure, an atomic clock and methods of forming and/or using an atomic clock are disclosed. In one embodiment, an atomic clock includes: a light source configured to illuminate a resonance vapor cell; a narrowband optical filter disposed between the light source and the resonance vapor cell and arranged such that light emitted from the light source passes through the narrowband optical filter and illuminates the resonance vapor cell. The resonance vapor cell is configured to emit a signal corresponding to a hyperfine transition frequency in response to illumination from the light source, and a filter cell is disposed between the light source and the resonance vapor cell and configured to generate optical pumping. An optical detector is configured to detect the emitted signal corresponding to the hyperfine transition frequency.Type: ApplicationFiled: July 2, 2021Publication date: January 6, 2022Inventors: Svenja Knappe, Sean Krzyzewski
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Publication number: 20180313908Abstract: A calibration system and method is described to continuously measure and adjust several parameters of a magnetic imaging array. One or more non-target magnetic field source(s) are used to generate a well-defined and distinguishable spatial magnetic field distribution. The magnetic imaging array is used to measure the strength of the non-target magnetic fields and the information is used to calibrate several parameters of the array, such as, but not limited to, effective magnetometer positions and orientations, gains and their frequency dependence, bandwidth, and linearity. The calibration can happen continuously or periodically, while the imaging array is operating to create magnetic field images, if the modulation frequencies for calibration are outside the frequency window of interest.Type: ApplicationFiled: April 28, 2017Publication date: November 1, 2018Applicant: QuSpin Inc.Inventors: Svenja Knappe, Orang Alem, Vishal Shah
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Publication number: 20180238974Abstract: A system and method to measure a magnetic gradient field with an optically-pumped magnetometer is described. Atoms are spin polarized at two locations. Larmor frequencies are, induced and the spin frequency is detected. The frequencies are proportional to the total magnetic field at the locations of the atoms. The magnetic field gradient is extracted from the beat frequency of the two Larmor frequencies.Type: ApplicationFiled: April 24, 2017Publication date: August 23, 2018Applicant: QuSpin Inc.Inventors: Vishal Shah, Svenja Knappe, Kenneth Jeramiah Hughes, Orang Alem, James Osborne, Jeffrey Orton
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Patent number: 9791536Abstract: A mutually calibrated magnetic imaging array system is described. The system includes a non-target magnetic source rigidly attached to a magnetometer, and an attached control unit to measure and adjust several parameters of a magnetic imaging array. A non-target magnetic field source is used to generate a well-defined and distinguishable spatial magnetic field distribution. The source is rigidly attached directly to a magnetometer, while the relative positions of the magnetometers are unknown. The magnetic imaging array is used to measure the strength of the non-target source magnetic fields and the information is used to calibrate several parameters of the array, such as, but not limited to, effective magnetometer positions and orientations with respect to each other and cross-talk between the magnetometers. The system, and method described herein eliminates the need for a separate calibration phantom.Type: GrantFiled: April 28, 2017Date of Patent: October 17, 2017Assignee: QuSpin, Inc.Inventors: Orang Alem, Vishal Shah, Svenja Knappe
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Patent number: 9140657Abstract: An embodiment of a method of detecting a J-coupling includes providing a polarized analyte adjacent to a vapor cell of an atomic magnetometer; and measuring one or more J-coupling parameters using the atomic magnetometer. According to an embodiment, measuring the one or more J-coupling parameters includes detecting a magnetic field created by the polarized analyte as the magnetic field evolves under a J-coupling interaction.Type: GrantFiled: April 13, 2010Date of Patent: September 22, 2015Assignees: The Regents of the University of California, The United States of America, as represented by the Secretary of Commerce, the National Institute of Standards and TechnologyInventors: Micah P. Ledbetter, Charles W. Crawford, David E. Wemmer, Alexander Pines, Svenja Knappe, John Kitching, Dmitry Budker
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Patent number: 8334690Abstract: A magnetometer and method of use is presently disclosed. The magnetometer has at least one sensor void of extraneous metallic components, electrical contacts and electrically conducting pathways. The sensor contains an active material vapor, such as an alkali vapor, that alters at least one measurable parameter of light passing therethrough, when in a magnetic field. The sensor may have an absorptive material configured to absorb laser light and thereby activate or heat the active material vapor.Type: GrantFiled: August 7, 2009Date of Patent: December 18, 2012Assignee: The United States of America as represented by the Secretary of Commerce, The National Institute of Standards and TechnologyInventors: John Kitching, Svenja Knappe, Jan Preusser, Vladislav Gerginov
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Publication number: 20120176130Abstract: An embodiment of a method of detecting a J-coupling includes providing a polarized analyte adjacent to a vapor cell of an atomic magnetometer; and measuring one or more J-coupling parameters using the atomic magnetometer. According to an embodiment, measuring the one or more J-coupling parameters includes detecting a magnetic field created by the polarized analyte as the magnetic field evolves under a J-coupling interaction.Type: ApplicationFiled: April 13, 2010Publication date: July 12, 2012Applicant: The Regents of the University of CaliforniaInventors: Micah P. Ledbetter, Charles W. Crawford, David E. Wemmer, Alexander Pines, Svenja Knappe, John Kitching, Dmitry Budker
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Patent number: 7994783Abstract: An integral microfluidic device includes an alkali vapor cell and microfluidic channel, which can be used to detect magnetism for nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI). Small magnetic fields in the vicinity of the vapor cell can be measured by optically polarizing and probing the spin precession in the small magnetic field. This can then be used to detect the magnetic field of in encoded analyte in the adjacent microfluidic channel. The magnetism in the microfluidic channel can be modulated by applying an appropriate series of radio or audio frequency pulses upstream from the microfluidic chip (the remote detection modality) to yield a sensitive means of detecting NMR and MRI.Type: GrantFiled: February 6, 2009Date of Patent: August 9, 2011Assignee: The Regents of the Univerisity of CaliforniaInventors: Micah P. Ledbetter, Igor M. Savukov, Dmitry Budker, Vishal K. Shah, Svenja Knappe, John Kitching, David J. Michalak, Shoujun Xu, Alexander Pines
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Publication number: 20110031969Abstract: A magnetometer and method of use is presently disclosed. The magnetometer has at least one sensor void of extraneous metallic components, electrical contacts and electrically conducting pathways. The sensor contains an active material vapor, such as an alkali vapor, that alters at least one measurable parameter of light passing therethrough, when in a magnetic field. The sensor may have an absorptive material configured to absorb laser light and thereby activate or heat the active material vapor.Type: ApplicationFiled: August 7, 2009Publication date: February 10, 2011Inventors: John Kitching, Svenja Knappe, Jan Preusser, Vladislav Gerginov
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Publication number: 20090256561Abstract: An integral microfluidic device includes an alkali vapor cell and microfluidic channel, which can be used to detect magnetism for nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI). Small magnetic fields in the vicinity of the vapor cell can be measured by optically polarizing and probing the spin precession in the small magnetic field. This can then be used to detect the magnetic field of in encoded analyte in the adjacent microfluidic channel. The magnetism in the microfluidic channel can be modulated by applying an appropriate series of radio or audio frequency pulses upstream from the microfluidic chip (the remote detection modality) to yield a sensitive means of detecting NMR and MRI.Type: ApplicationFiled: February 6, 2009Publication date: October 15, 2009Applicant: The Regents of the University of CaliforniaInventors: Micah P. Ledbetter, Igor M. Savukov, Dmitry Budker, Vishal K. Shah, Svenja Knappe, John Kitching, David J. Michalak, Shoujun Xu, Alexander Pines
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Publication number: 20050007118Abstract: A method of fabricating compact alkali vapor filled cells that have volumes of 1 cm3 or less that are useful in atomic frequency reference devices such as atomic clocks. According to one embodiment the alkali vapor filled cells are formed by sealing the ends of small hollow glass fibers. According to another embodiment the alkali vapor filled cells are formed by anodic bonding of glass plates to silicon wafers to seal the openings of holes formed in the silicon wafers. The anodic bonding method of fabricating the alkali vapor filled cells enables the production of semi-monolithic integrated physics packages of various designs.Type: ApplicationFiled: April 8, 2004Publication date: January 13, 2005Inventors: John Kitching, Leo Hollberg, Li-Anne Liew, Svenja Knappe, John Moreland, Volodja Velichanski, Hugh Robinson
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Patent number: 6831522Abstract: A method is provided for optimizing the performance of laser-pumped atomic frequency references with respect to the laser detuning and other operating parameters. This method is based on the new understanding that the frequency references short-term instability is minimized when (a) the laser frequency is tuned nominally a few tens of MHz away from the center of the atomic absorption line, and (b) the external oscillator lock modulation frequency is set either far below or far above the inverse of the optical pumping time of the atoms.Type: GrantFiled: June 20, 2002Date of Patent: December 14, 2004Assignee: The United States of America as represented by the Secretary of CommerceInventors: John Kitching, Leo Hollberg, Robert Wynands, Svenja Knappe
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Publication number: 20020175767Abstract: A method is provided for optimizing the performance of laser-pumped atomic frequency references with respect to the laser detuning and other operating parameters. This method is based on the new understanding that the frequency references short-term instability is minimized when (a) the laser frequency is tuned nominally a few tens of MHz away from the center of the atomic absorption line, and (b) the external oscillator lock modulation frequency is set either far below or far above the inverse of the optical pumping time of the atoms.Type: ApplicationFiled: June 20, 2002Publication date: November 28, 2002Inventors: John Kitching, Leo Hollberg, Robert Wynands, Svenja Knappe