Patents by Inventor Ryotaro INOUE
Ryotaro INOUE 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: 11808577Abstract: 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.Type: GrantFiled: September 24, 2020Date of Patent: November 7, 2023Assignees: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Ryotaro Inoue, Mikio Kozuma, Atsushi Tanaka
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Publication number: 20230332893Abstract: An adjuster 500 performs simultaneous irradiation of M laser beams to an atomic beam 131, where M is a predetermined integer satisfying 3?M. The course of each of the M laser beams intersects with an approach path of the atomic beam 131. A component, in a direction perpendicular to the approach path of the atomic beam, of the sum of radiation pressure vectors that the M laser beams respectively have is non-zero. A component, in a direction of the approach path of the atomic beam, of the sum of the radiation pressure vectors that the M laser beams respectively have is negative for atoms having speeds greater than the predetermined speed, and positive for the atoms having speeds smaller than the predetermined speed.Type: ApplicationFiled: July 12, 2021Publication date: October 19, 2023Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Kento TANIGUCHI, Ryotaro INOUE, Mikio KOZUMA, Atsushi TANAKA
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Publication number: 20230332895Abstract: An adjuster performs simultaneous irradiation of M laser beams to an atomic beam, where M is a predetermined integer satisfying 3??M. The course of each of the M laser beams intersects with the course of the atomic beam. A component, in a direction perpendicular to the course of the atomic beam, of the sum of radiation pressure vectors that the M laser beams respectively have is zero.Type: ApplicationFiled: July 12, 2021Publication date: October 19, 2023Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Ryotaro INOUE, Mikio KOZUMA, Kento TANIGUCHI, Atsushi TANAKA
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Publication number: 20230160683Abstract: An atomic beam is irradiated with a first, a second, and a third laser beam. The first laser beam and the third laser beam each have a wavelength corresponding to a transition between a ground state and a first excited state. The second laser beam has a wavelength corresponding to a transition between the ground state and a second excited state. First, atoms each having a smaller velocity component than a predetermined velocity in a direction orthogonal to the traveling direction of the atomic beam are changed from the ground state to the first excited state by the first laser beam. Subsequently, a momentum is provided for individual atoms in the ground state by the second laser beam, which removes the atoms from the atomic beam. Finally, atoms in the first excited state are returned from the first excited state to the ground state by the third laser beam.Type: ApplicationFiled: January 19, 2023Publication date: May 25, 2023Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Mikio KOZUMA, Ryotaro INOUE, Toshiyuki HOSOYA, Atsushi TANAKA
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Patent number: 11614318Abstract: An atomic beam is irradiated with a first laser beam, a second laser beam, and a third laser beam. The first laser beam and the third laser beam each have a wavelength corresponding to a transition between a ground state and a first excited state. The second laser beam has a wavelength corresponding to a transition between the ground state and a second excited state. First, atoms each having a smaller velocity component than a predetermined velocity in a direction orthogonal to the traveling direction of the atomic beam are changed from the ground state to the first excited state by the first laser beam. Subsequently, a momentum is provided for individual atoms in the ground state by the second laser beam, which removes the atoms from the atomic beam. Finally, atoms in the first excited state are returned from the first excited state to the ground state by the third laser beam.Type: GrantFiled: October 9, 2019Date of Patent: March 28, 2023Assignees: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Mikio Kozuma, Ryotaro Inoue, Toshiyuki Hosoya, Atsushi Tanaka
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Patent number: 11585657Abstract: A geoid calculation data is collected easily. A geoid calculation data collection device of the present invention comprises an inertial measurement data acquisition part, a comparison data acquisition part, and a recording part. In the inertial measurement data acquisition part, data related to velocity, position, and attitude angle is acquired as inertially-derived data based on an output of an inertial measurement part having a three-axis gyro and a three-axis accelerometer attached to a moving body. In the comparison data acquisition part, data related to velocity is acquired as comparison data from a source other than the inertial measurement part. In the recording part, inertially-derived data and comparison data are recorded in association with each other. In the inertial measurement part, a bias stability is acquired that allows error arising from plumb line deviation to be distinguished to a predetermined degree.Type: GrantFiled: May 27, 2022Date of Patent: February 21, 2023Assignees: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Mikio Kozuma, Ryotaro Inoue, Toshiyuki Hosoya, Atsushi Tanaka
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Publication number: 20230011067Abstract: 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.Type: ApplicationFiled: September 24, 2020Publication date: January 12, 2023Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Ryotaro INOUE, Mikio KOZUMA, Atsushi TANAKA
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Patent number: 11466987Abstract: The present invention reduces measurement time. A gyroscope of the present invention includes a planar ion trap part, a microwave irradiation part, a laser irradiation part and a measurement part. The planar ion trap part includes two rf electrodes and two DC electrode rows, and forms ion traps that trap one ion on a substrate, a normal direction of the surface of the planar ion trap part corresponds to a z direction. The rf electrodes are disposed in the x direction on the substrate at a predetermined interval. The DC electrode rows are disposed in the x direction on the substrate so as to sandwich the two rf electrodes. The DC electrode rows each include at least five DC electrodes in the x direction. The trapped ions are spaced so as not to interfere with each other. The microwave irradiation part irradiates the ions with ?/2 microwave pulses.Type: GrantFiled: July 25, 2018Date of Patent: October 11, 2022Assignees: TOKYO INSTITUTE OF TECHNOLOGY, OSAKA UNIVERSITY, JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mikio Kozuma, Ryotaro Inoue, Takashi Mukaiyama, Utako Tanaka, Seiichi Morimoto, Kazunori Yoshioka, Atsushi Tanaka, Yuichiro Kamino
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Publication number: 20220290988Abstract: A geoid calculation data is collected easily. A geoid calculation data collection device of the present invention comprises an inertial measurement data acquisition part, a comparison data acquisition part, and a recording part. In the inertial measurement data acquisition part, data related to velocity, position, and attitude angle is acquired as inertially-derived data based on an output of an inertial measurement part having a three-axis gyro and a three-axis accelerometer attached to a moving body. In the comparison data acquisition part, data related to velocity is acquired as comparison data from a source other than the inertial measurement part. In the recording part, inertially-derived data and comparison data are recorded in association with each other. In the inertial measurement part, a bias stability is acquired that allows error arising from plumb line deviation to be distinguished to a predetermined degree.Type: ApplicationFiled: May 27, 2022Publication date: September 15, 2022Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Mikio KOZUMA, Ryotaro INOUE, Toshiyuki HOSOYA, Atsushi TANAKA
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Patent number: 11378397Abstract: A change in geoid height is measured easily. A geoid measurement method of the present invention executes an inertial measurement data acquiring step, a comparison data acquiring step, a state variable estimating step, and a geoid calculating step. In the inertial measurement data acquiring step, data related to velocity, position, and attitude angle is acquired as inertially-derived data based on the output of an inertial measurement part having a three-axis gyro and a three-axis accelerometer attached to a moving body. In the comparison data acquiring step, data related to velocity is acquired as comparison data from a source other than the inertial measurement part. In the state variable estimating step, state variables including a plumb line deviation are estimated by using the inertially-derived data and the comparison data to apply a Kalman filter in which the plumb line deviation is included in the state variables.Type: GrantFiled: June 4, 2019Date of Patent: July 5, 2022Assignees: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Mikio Kozuma, Ryotaro Inoue, Toshiyuki Hosoya, Atsushi Tanaka
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Publication number: 20210389114Abstract: An atomic beam is irradiated with a first laser beam, a second laser beam, and a third laser beam. The first laser beam and the third laser beam each have a wavelength corresponding to a transition between a ground state and a first excited state. The second laser beam has a wavelength corresponding to a transition between the ground state and a second excited state. First, atoms each having a smaller velocity component than a predetermined velocity in a direction orthogonal to the traveling direction of the atomic beam are changed from the ground state to the first excited state by the first laser beam. Subsequently, a momentum is provided for individual atoms in the ground state by the second laser beam, which removes the atoms from the atomic beam. Finally, atoms in the first excited state are returned from the first excited state to the ground state by the third laser beam.Type: ApplicationFiled: October 9, 2019Publication date: December 16, 2021Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Mikio KOZUMA, Ryotaro INOUE, Toshiyuki HOSOYA, Atsushi TANAKA
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Publication number: 20210233676Abstract: Provided is a cold atomic beam generation technology that causes a cold atomic beam to travel in a direction different from the traveling direction of a pushing laser beam. The pushing laser beam is used to generate a cold atomic beam from atoms trapped in a space. Next, the cold atomic beam is deflected by using a zero magnetic field line of a quadrupole magnetic field in a two-dimensional magneto-optical trap mechanism or by using a drift direction of a standing light wave in a moving molasses mechanism.Type: ApplicationFiled: June 6, 2019Publication date: July 29, 2021Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Ryotaro INOUE, Mikio KOZUMA, Atsushi TANAKA
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Publication number: 20210199435Abstract: A change in geoid height is measured easily. A geoid measurement method of the present invention executes an inertial measurement data acquiring step, a comparison data acquiring step, a state variable estimating step, and a geoid calculating step. In the inertial measurement data acquiring step, data related to velocity, position, and attitude angle is acquired as inertially-derived data based on the output of an inertial measurement part having a three-axis gyro and a three-axis accelerometer attached to a moving body. In the comparison data acquiring step, data related to velocity is acquired as comparison data from a source other than the inertial measurement part. In the state variable estimating step, state variables including a plumb line deviation are estimated by using the inertially-derived data and the comparison data to apply a Kalman filter in which the plumb line deviation is included in the state variables.Type: ApplicationFiled: June 4, 2019Publication date: July 1, 2021Applicants: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, TOKYO INSTITUTE OF TECHNOLOGYInventors: Mikio KOZUMA, Ryotaro INOUE, Toshiyuki HOSOYA, Atsushi TANAKA
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Publication number: 20200333139Abstract: A gyroscope of the present invention includes a moving standing light wave generator to generate three moving standing light waves, an atomic beam source to continuously generate an atomic beam in which individual atoms are in the same state, an interference device that exerts a Sagnac effect through interaction between the atomic beam and the three moving standing light waves and a monitor to detect angular velocity or acceleration by monitoring an atomic beam from the interference device. The atoms are alkaline earth metal atoms, alkaline earth-like metal atoms, stable isotopes of alkaline earth metal atoms or stable isotopes of alkaline earth-like metal atoms.Type: ApplicationFiled: July 25, 2018Publication date: October 22, 2020Applicants: TOKYO INSTITUTE OF TECHNOLOGY, OSAKA UNIVERSITY, JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mikio KOZUMA, Ryotaro INOUE, Takashi MUKAIYAMA, Seiichi MORIMOTO, Kazunori YOSHIOKA, Atsushi TANAKA, Yuichiro KAMINO
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Publication number: 20200318968Abstract: A gyroscope of the present invention includes a moving standing light wave generator to generate three moving standing light waves, an atomic beam source to continuously generate an atomic beam in which individual atoms are in the same state, an interference device that exerts a Sagnac effect through interaction between the atomic beam and the three moving standing light waves, and a monitor to detect angular velocity or acceleration by monitoring an atomic beam from the interference device. Each moving standing light wave satisfies an n-th order Bragg condition, where n is a positive integer of 2 or more.Type: ApplicationFiled: July 25, 2018Publication date: October 8, 2020Applicants: TOKYO INSTITUTE OF TECHNOLOGY, OSAKA UNIVERSITY, JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mikio KOZUMA, Ryotaro INOUE, Takashi MUKAIYAMA, Seiichi MORIMOTO, Kazunori YOSHIOKA, Atsushi TANAKA, Yuichiro KAMINO
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Publication number: 20200300630Abstract: The present invention reduces measurement time. A gyroscope of the present invention includes a planar ion trap part, a microwave irradiation part, a laser irradiation part and a measurement part. The planar ion trap part includes two rf electrodes and two DC electrode rows, and forms ion traps that trap one ion on a substrate, a normal direction of the surface of the planar ion trap part corresponds to a z direction. The rf electrodes are disposed in the x direction on the substrate at a predetermined interval. The DC electrode rows are disposed in the x direction on the substrate so as to sandwich the two rf electrodes. The DC electrode rows each include at least five DC electrodes in the x direction. The trapped ions are spaced so as not to interfere with each other. The microwave irradiation part irradiates the ions with ?/2 microwave pulses.Type: ApplicationFiled: July 25, 2018Publication date: September 24, 2020Applicants: TOKYO INSTITUTE OF TECHNOLOGY, OSAKA UNIVERSITY, JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mikio KOZUMA, Ryotaro INOUE, Takashi MUKAIYAMA, Utako TANAKA, Seiichi MORIMOTO, Kazunori YOSHIOKA, Atsushi TANAKA, Yuichiro KAMINO
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Publication number: 20200256677Abstract: A gyroscope includes an atomic beam source to generate an atomic beam in which individual atoms are in the same state, a moving standing light wave generator to generate M moving standing light waves, an interference device to obtain an atomic beam resulting from the interaction between the atomic beam and the M moving standing light waves, a monitor to detect angular velocity by monitoring the atomic beam from the interference device and an accelerometer. The accelerometer acquires information on acceleration applied to the gyroscope and the moving standing light wave generator adjusts the drift velocity of at least M?1 moving standing light waves among the M moving standing light waves in response to the acceleration information.Type: ApplicationFiled: July 25, 2018Publication date: August 13, 2020Applicants: TOKYO INSTITUTE OF TECHNOLOGY, OSAKA UNIVERSITY, JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITED, MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Mikio KOZUMA, Ryotaro INOUE, Takashi MUKAIYAMA, Seiichi MORIMOTO, Kazunori YOSHIOKA, Atsushi TANAKA, Yuichiro KAMINO