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1.发明公开公开(公告)号：US20240328786A1
公开(公告)日：2024-10-03
申请号：US18191541
申请日：2023-03-28
Applicant: Honeywell International Inc.
Inventor： Robert Compton
CPC classification number: G01C21/165 , G01C19/58 , G02F1/3517 , H01S3/0078 , G02F2203/56
Abstract: An atomic inertial interferometer comprises a laser that emits a CW beam; a modulator that modulates the CW beam; a filter and delay mechanism that receives the modulated beam, and includes a first pathway and a second pathway longer than the first pathway; a comb generator that receives the modulated beam, and produces a frequency comb; and a comb drive coupled to the comb generator to generate a multiple of a comb repetition rate, the comb drive including a HF source coupled to a bandpass filter. A vacuum cell holds a sample of cold atoms. The frequency comb counter-propagates with respect to the modulated beam to provide velocity slicing of the cold atoms such that a given temperature distribution of the cold atoms is sliced into a plurality of narrow temperature distributions that are probed individually and in parallel, to extract an interference signal from the narrow temperature distributions.
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公开(公告)号：US20240133713A1
公开(公告)日：2024-04-25
申请号：US18484878
申请日：2023-10-11
Applicant: Murata Manufacturing Co., Ltd.
Inventor： Jaakko RUOHIO
Abstract: A MEMS gyrocompass and method are provided to mitigate systematic error in determination of a north angle. The MEMS gyrocompass includes one or more MEMS gyroscopes having a sense axis within a reference plane. Samples from an output of the MEMS gyroscope are obtained in at least two angles of rotation about an axis perpendicular to the reference plane. First fit coefficients are determined by fitting samples with first fitting functions determined as function of time. Second fit coefficients are determined by fitting components of earth rotation rate projected on the reference plane based on samples obtained by all the MEMS gyroscopes, which fitting is performed with a second fitting function determined as a function of rotation angle of the MEMS gyroscope with respect to a reference angle. The north angle is determined as an angle between the reference angle and true north based on the second fit coefficients.
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公开(公告)号：US11808577B2
公开(公告)日：2023-11-07
申请号：US17780668
申请日：2020-09-24
Inventor： Ryotaro Inoue , Mikio Kozuma , Atsushi Tanaka
CPC classification number: G01C19/721 , G01C19/58 , G01P3/36 , G01P15/14 , G02F1/11 , G02F2/02 , G02F1/093 , G02F2201/02
Abstract: An atomic interferometer includes: an optical system including an optical modulating device that includes: an optical fiber for a first laser beam to propagate therein; and a frequency shifter connected to the optical fiber and configured to shift the frequency of the first laser beam, the optical system being configured to generate a moving standing light wave from counter-propagation of the first laser beam from the optical modulating device and a second laser beam; and an interference system for making an atomic beam interact with three or more moving standing light waves including the moving standing light wave.
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公开(公告)号：US20230197308A1
公开(公告)日：2023-06-22
申请号：US18066344
申请日：2022-12-15
Applicant: The Government of the United States of America, as represented by the Secretary of the Navy
Inventor： Adam Black , Jonathan Kwolek
Abstract: An atom interferometer that utilizes two counterpropagating continuous 3D-cooled atom beams which are directed into a vacuum chamber. Momentum-transfer laser (MTL) beams are directed into the atom beams to produce a predetermined recoil and subsequently generate an interference signal that is read by a photodetector and analyzed by a processor to provide information regarding inertial forces such as acceleration and rotation rate. Reversal of the recoil direction of the MTL beams allows for the suppression of errors in the measurement of the inertial forces.
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公开(公告)号：US09952154B2
公开(公告)日：2018-04-24
申请号：US15402399
申请日：2017-01-10
Applicant: The Charles Stark Draper Laboratory, Inc.
Inventor： Matthew A. Sinclair , Adam Kelsey , Richard E. Stoner
CPC classification number: G01N21/6404 , G01B9/02015 , G01B9/02061 , G01B2290/55 , G01C19/58 , G01N21/645 , G01N2021/6463 , G01N2201/06113 , G01V7/00 , G21K1/006
Abstract: An atomic interferometer and methods for measuring phase shifts in interference fringes using the same. The atomic interferometer has a laser beam traversing an ensemble of atoms along a first path and an optical components train with at least one alignment-insensitive beam routing element configured to reflect the laser beam along a second path that is anti-parallel with respect to the first laser beam path. Any excursion from parallelism of the second beam path with respect to the first is rigorously independent of variation of the first laser beam path in yaw parallel to an underlying plane.
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Patent Agency Ranking
公开(公告)号：US09916913B2
公开(公告)日：2018-03-13
申请号：US15294510
申请日：2016-10-14
Applicant: Honeywell International Inc.
Inventor： Robert Compton , Kenneth Salit
Abstract: Embodiments described herein provide for a method of launching atoms in an atom interferometer. The method includes determining a direction of the total effective acceleration force on the atoms, controlling a direction of launch of the atoms for measurement in the atom interferometer based on the direction of the total effective acceleration force, and obtaining measurements from the atoms.
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公开(公告)号：US09887019B2
公开(公告)日：2018-02-06
申请号：US15016180
申请日：2016-02-04
Applicant: Honeywell International Inc.
Inventor： Robert Compton , Karl D. Nelson , Chad Fertig
Abstract: Systems and methods for eliminating multi-path errors from atomic inertial sensors are provided. In certain embodiments, a system for performing atom interferometry includes a vacuum cell containing multiple atoms and a first plurality of lasers configured to trap the atoms within the vacuum cell. The system further includes a second plurality of lasers configured to impart momentum to the atoms and direct the atoms down multiple paths, wherein a primary path in the multiple paths has a first and second component that converge at a converging point, wherein a diverging part of the primary path in which the first and second components are diverging is asymmetrical with respect to a converging part of the primary path in which the first and second components are converging, such that only the first and second components converge at the converging point wherein other paths do not converge at the converging point.
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公开(公告)号：US09689679B2
公开(公告)日：2017-06-27
申请号：US14504720
申请日：2014-10-02
Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventor： Dmitry Budker , Micah Ledbetter , Kasper Jensen , Andrey Jarmola
Abstract: A solid-state gyroscope apparatus based on ensembles of negatively charged nitrogen-vacancy (NV−) centers in diamond and methods of detection are provided. In one method, rotation of the NV− symmetry axis will induce Berry phase shifts in the NV− electronic ground-state coherences proportional to the solid angle subtended by the symmetry axis. A second method uses a modified Ramsey scheme where Berry phase shifts in the 14N hyperfine sublevels are employed.
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9.发明申请公开(公告)号：US20170032863A1
公开(公告)日：2017-02-02
申请号：US15294510
申请日：2016-10-14
Applicant: Honeywell International Inc.
Inventor： Robert Compton , Kenneth Salit
Abstract: Embodiments described herein provide for a method of launching atoms in an atom interferometer. The method includes determining a direction of the total effective acceleration force on the atoms, controlling a direction of launch of the atoms for measurement in the atom interferometer based on the direction of the total effective acceleration force, and obtaining measurements from the atoms.
Abstract translation: 本文描述的实施例提供了在原子干涉仪中发射原子的方法。 该方法包括确定原子上总有效加速力的方向，基于总有效加速力的方向控制原子干涉仪中用于测量的原子的发射方向，并从原子获得测量值。
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公开(公告)号：US20160298967A1
公开(公告)日：2016-10-13
申请号：US14214767
申请日：2014-03-15
Applicant: The Charles Stark Draper Laboratory, Inc.
Inventor： David M.S. Johnson , David L. Butts , Richard E. Stoner
CPC classification number: G01C19/62 , G01B9/02 , G01C19/58 , G01C21/165 , G01C21/18 , G01P9/02 , G01P15/08
Abstract: Compact inertial measurement systems and methods based on atom interferometry. Certain examples provide a combination atomic accelerometer-gyroscope configured to recapture and cycle atom samples through atom interferometers arranged to allow the next measurement to use the atoms from the previous measurement. Examples of the apparatus provide inertial measurements indicative of rotation for different inertial axes by applying atom interferometry to a plurality of atom samples launched in opposite directions to allow for measurement of both acceleration and rotation rates. In some examples, the inertial measurement apparatus provide a combined atomic gyroscope and an atomic accelerometer in a compact six Degrees of Freedom (6 DOF) IMU.
Abstract translation: 基于原子干涉测量的紧凑型惯性测量系统和方法。 某些示例提供了一种组合原子加速度计 - 陀螺仪，其被配置为通过布置成允许下次测量使用来自先前测量的原子的原子干涉仪来重新捕获和循环原子样品。 该装置的实例通过将原子干涉测量法应用于沿相反方向发射的多个原子样品，提供表示不同惯性轴的旋转的惯性测量，以允许测量加速度和旋转速率。 在一些示例中，惯性测量装置提供了一种紧凑的六自由度（6自由度）IMU中的组合原子陀螺仪和原子加速度计。
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