Patents by Inventor Masashi NARUSE
Masashi NARUSE 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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Publication number: 20240162842Abstract: An electric motor includes processing circuitry estimates a position of a rotor in a mode selected from an induced voltage mode and a harmonic superimposition mode. The processing circuitry estimates the position of the rotor using the induced voltage mode when the input voltage is less than or equal to a predetermined voltage threshold value or when the phase current is greater than or equal to a predetermined current threshold value and estimates the position of the rotor using the harmonic superimposition mode when the input voltage is greater than the voltage threshold value and the phase current is less than the current threshold value.Type: ApplicationFiled: November 8, 2023Publication date: May 16, 2024Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKIInventors: Masashi KUBOTA, Takuya NARUSE, Takashi KAWASHIMA
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GAS LASER AMPLIFIER, GAS LASER APPARATUS, EUV LIGHT GENERATION APPARATUS, AND EUV EXPOSURE APPARATUS
Publication number: 20240128705Abstract: A gas laser amplifier includes a housing, discharge electrode pairs, and an optical resonator. The housing includes an entrance window that allows entry of a first laser beam from outside and an exit window that allows exit of the first laser beam amplified. Each of the discharge electrode pairs excites a laser gas supplied between discharge electrodes facing each other in the housing. The optical resonator causes a second laser beam to oscillate with a gain of the excited laser gas in a non-incident state where the first laser beam from outside the housing does not enter the housing through the entrance window. In an incident state where the first laser beam enters the housing through the entrance window, the optical resonator suspends the oscillation of the second laser beam.Type: ApplicationFiled: November 11, 2019Publication date: April 18, 2024Applicant: Mitsubishi Electric CorporationInventors: Tatsuya YAMAMOTO, Junichi NISHIMAE, Yuzuru TADOKORO, Masashi NARUSE, Takuya KAWASHIMA -
Patent number: 11734810Abstract: A laser system for amplifying laser light generated from a laser light source and emitting the laser light includes an optical element in an optical path of the laser light and transmits the laser light, a control device to control power to be supplied to the laser system, an imager to capture an image of the optical element, and an image processing circuitry to process the image of the optical element captured by the imager. The image processing circuitry in which reference images of the optical element corresponding to power information relating to the power are prepared in advance includes a comparison unit to compare a captured image of the optical element captured by the imager with a reference image selected by a reference image selection unit, the reference image corresponding to the power information at a time of image capturing by the imager.Type: GrantFiled: July 15, 2020Date of Patent: August 22, 2023Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Takuya Kawashima, Sei Ebihara, Tatsuya Yamamoto, Masashi Naruse, Ken Hamachiyo
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Publication number: 20230196538Abstract: A laser system for amplifying laser light generated from a laser light source and emitting the laser light includes an optical element in an optical path of the laser light and transmits the laser light, a control device to control power to be supplied to the laser system, an imager to capture an image of the optical element, and an image processing circuitry to process the image of the optical element captured by the imager. The image processing circuitry in which reference images of the optical element corresponding to power information relating to the power are prepared in advance includes a comparison unit to compare a captured image of the optical element captured by the imager with a reference image selected by a reference image selection unit, the reference image corresponding to the power information at a time of image capturing by the imager.Type: ApplicationFiled: July 15, 2020Publication date: June 22, 2023Applicant: Mitsubishi Electric CorporationInventors: Takuya KAWASHIMA, Sei EBIHARA, Tatsuya YAMAMOTO, Masashi NARUSE, Ken HAMACHIYO
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Patent number: 11367988Abstract: A gas laser device includes a shielding plate that is a first shielding member, and a shielding plate that is a second shielding member. The first shielding member includes a first opening, and a second opening. A laser beam that is to be propagated to discharge regions passes through the first opening. The laser beam that has taken a round trip through the discharge regions after passing through the first opening passes through the second opening. The second shielding plate faces the first shielding member the discharge regions located therebetween. The shielding plate includes an opening that is a third opening. The laser beam that has been propagated through the first opening and the discharge regions, and the laser beam that is to be propagated to the second opening through the discharge regions pass through the third opening. A plane shape of the third opening includes a rectilinear segment.Type: GrantFiled: May 17, 2019Date of Patent: June 21, 2022Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Tatsuya Yamamoto, Junichi Nishimae, Yuzuru Tadokoro, Masashi Naruse, Takuya Kawashima
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Publication number: 20220094129Abstract: A gas laser device includes a shielding plate that is a first shielding member, and a shielding plate that is a second shielding member. The first shielding member includes a first opening, and a second opening. A laser beam that is to be propagated to discharge regions passes through the first opening. The laser beam that has taken a round trip through the discharge regions after passing through the first opening passes through the second opening. The second shielding plate faces the first shielding member the discharge regions located therebetween. The shielding plate includes an opening that is a third opening. The laser beam that has been propagated through the first opening and the discharge regions, and the laser beam that is to be propagated to the second opening through the discharge regions pass through the third opening. A plane shape of the third opening includes a rectilinear segment.Type: ApplicationFiled: May 17, 2019Publication date: March 24, 2022Applicant: Mitsubishi Electric CorporationInventors: Tatsuya YAMAMOTO, Junichi NISHIMAE, Yuzuru TADOKORO, Masashi NARUSE, Takuya KAWASHIMA
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Patent number: 10211589Abstract: Kinematic mounts have three points having zero degree of freedom, one degree of freedom, and two degrees of freedom, respectively. As viewed from a direction perpendicular to a plane containing the three points, an extension of an entrance optical axis of a laser beam to an amplifying apparatus or an extension of an exit optical axis from the amplifying apparatus is oriented to the point with the zero degree of freedom. A translational direction of the point with the one degree of freedom is oriented to the point with the zero degree of freedom. One of the extension of the entrance optical axis and the extension of the exist optical axis passes on a side closer to the point with the two degrees of freedom with respect to a side of the point with the one degree of freedom.Type: GrantFiled: April 20, 2016Date of Patent: February 19, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Kouji Funaoka, Masashi Naruse
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Publication number: 20180034228Abstract: Kinematic mounts have three points having zero degree of freedom, one degree of freedom, and two degrees of freedom, respectively. As viewed from a direction perpendicular to a plane containing the three points, an extension of an entrance optical axis of a laser beam to an amplifying apparatus or an extension of an exit optical axis from the amplifying apparatus is oriented to the point with the zero degree of freedom. A translational direction of the point with the one degree of freedom is oriented to the point with the zero degree of freedom. One of the extension of the entrance optical axis and the extension of the exist optical axis passes on a side closer to the point with the two degrees of freedom with respect to a side of the point with the one degree of freedom.Type: ApplicationFiled: April 20, 2016Publication date: February 1, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kouji FUNAOKA, Masashi NARUSE