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1.发明申请公开(公告)号：US20200280161A1
公开(公告)日：2020-09-03
申请号：US16865537
申请日：2020-05-04
Applicant: Gigaphoton Inc.
Inventor： Yoshinobu WATABE , Masahide KATO , Hiroshi FURUSATO
Abstract: An optical element moving apparatus includes a first holder configured to hold a first optical element, a second holder configured to hold a second optical element and having an inclination that inclines with respect to a first direction in which the second holder approaches the first holder, a guide section configured to be capable of moving the second holder in a direction parallel to the first direction, and an elastic member disposed in a position which is located between the first holder and the second holder and through which a first plane passes, the first plane intersecting the inclination at right angles and being parallel to the first direction.
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公开(公告)号：US20230187892A1
公开(公告)日：2023-06-15
申请号：US18163689
申请日：2023-02-02
Applicant: Gigaphoton Inc.
Inventor： Yusuke SAITO , Masanori YASHIRO , Hiroshi FURUSATO , Yosuke WATANABE , Tokinori TERAO
CPC classification number: H01S3/08009 , H01S3/034 , H01S3/105 , G03F7/70025
Abstract: A line narrowing gas laser device includes a line narrowing device, an output coupling mirror, a laser chamber arranged on an optical path of an optical resonator, a first holder which supports the output coupling mirror, a second holder which supports the first holder to be rotatable about a rotation axis of the first holder, and an adjustment device supported by the second holder and being in contact with the first holder to rotate the first holder about the rotation axis. The line narrowing device has a characteristic of changing, into a first direction, beam pointing of laser light output toward the output coupling mirror when temperature inside the line narrowing device rises. The second holder and the adjustment device rotate the first holder in a direction in which a change in the first direction in the beam pointing of the laser light is suppressed by thermal expansion.
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Patent Agency Ranking
3.发明公开公开(公告)号：US20230187896A1
公开(公告)日：2023-06-15
申请号：US18167611
申请日：2023-02-10
Applicant: Gigaphoton Inc.
Inventor： Junichi MAEKAWA , Hiroshi FURUSATO
CPC classification number: H01S3/137 , G03F7/70025 , H01S3/1305 , H01S3/08004 , H01S3/225
Abstract: A line narrowing module includes an enclosure, a prism which is disposed in an internal space of the enclosure and through which light passes, a mounter which is disposed in the internal space and on which the prism is mounted, a fixing unit which is disposed in the internal space and fixes the prism to the mounter, and a light blocking member. The light blocking member is disposed in the internal space and blocks scattered light in the internal space, the scattered light produced from the light and traveling to the fixing unit.
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公开(公告)号：US20200244032A1
公开(公告)日：2020-07-30
申请号：US16849618
申请日：2020-04-15
Applicant: Gigaphoton Inc.
Inventor： Keisuke ISHIDA , Satoshi KOMURO , Hiroshi FURUSATO
Abstract: An excimer laser apparatus according to the present disclosure includes a chamber configured to accommodate a laser gas and a pair of electrodes and generate pulse-oscillating laser light when the gas pressure of the laser gas is controlled in accordance with voltage applied between the pair of electrodes, a power supply configured to apply the voltage between the pair of electrodes, and a controller to which a target value of the spectral linewidth of the laser light is inputted, the controller configured to correct the voltage used to control the gas pressure, when the target value changes from a first target value to a second target value, based on a first function having the second target value as a parameter and control the gas pressure in accordance with the corrected voltage.
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公开(公告)号：US20180323568A1
公开(公告)日：2018-11-08
申请号：US16033030
申请日：2018-07-11
Applicant: Gigaphoton Inc.
Inventor： Hiroshi FURUSATO , Takeshi OHTA , Natsuhiko KOUNO , Osamu WAKABAYASHI , Takahito KUMAZAKI
CPC classification number: H01S3/11 , H01S3/034 , H01S3/038 , H01S3/08009 , H01S3/134 , H01S3/137 , H01S3/2207 , H01S3/2222
Abstract: The line narrowed laser apparatus configured to perform a plurality of burst oscillations including a first burst oscillation and a second burst oscillation next to the first burst oscillation to output a pulse laser beam. The line narrowed laser apparatus comprises a laser resonator, a chamber provided in the laser resonator, a pair of electrodes provided in the chamber, an electric power source configured to apply a pulsed voltage to the pair of electrodes, a wavelength-selecting element provided in the laser resonator, a spectral width varying unit provided in the laser resonator, a wavelength variable unit configured to change a selected wavelength selected by the wavelength-selecting element, and a controller. The controller is configured to control the wavelength variable unit based on an amount of control of the spectral width varying unit in a period from a time of ending the first burst oscillation to a time of starting the second burst oscillation.
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公开(公告)号：US20180254600A1
公开(公告)日：2018-09-06
申请号：US15973896
申请日：2018-05-08
Applicant: Gigaphoton Inc.
Inventor： Takahito KUMAZAKI , Keisuke ISHIDA , Hiroshi FURUSATO
CPC classification number: H01S3/137 , G01J3/0205 , G01J3/0218 , G01J3/027 , G01J3/10 , G01J3/26 , G01J3/28 , G01J2003/2859 , G03F7/70025 , G03F7/70575 , G03F7/70725 , H01S3/005 , H01S3/0078 , H01S3/034 , H01S3/08004 , H01S3/08009 , H01S3/10038 , H01S3/10061 , H01S3/10069 , H01S3/106 , H01S3/225 , H01S3/2251 , H01S3/2256 , H01S3/2308
Abstract: A narrowband laser apparatus may be provided with a laser resonator including optical elements for narrowing a spectral linewidth, a spectrometer configured to detect spectral intensity distributions of multiple pulses included in a pulsed laser beam output from the laser resonator, a spectral waveform producer configured to produce a spectral waveform by adding up the spectral intensity distributions of the multiple pulses, a device function storage configured to store a device function of the spectrometer, a wavelength frequency function generator configured to generate a wavelength frequency function which represents a frequency distribution of center wavelengths of the multiple pulses, and a deconvolution processor configured to perform deconvolution processing on the spectral waveform with the device function and the wavelength frequency function.
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公开(公告)号：US20180123312A1
公开(公告)日：2018-05-03
申请号：US15857894
申请日：2017-12-29
Applicant: Gigaphoton Inc.
Inventor： Hiroshi FURUSATO , Keisuke ISHIDA , Takeshi OHTA , Takahito KUMAZAKI , Osamu WAKABAYASHI
CPC classification number: H01S3/11 , H01S3/0078 , H01S3/08004 , H01S3/08009 , H01S3/134 , H01S3/137 , H01S3/1398 , H01S3/225 , H01S2301/04
Abstract: The line narrowed laser apparatus configured to perform a plurality of burst oscillations including a first burst oscillation and a second burst oscillation next to the first burst oscillation to output a pulse laser beam. The line narrowed laser apparatus comprises a laser resonator, a chamber provided in the laser resonator, a pair of electrodes provided in the chamber, an electric power source configured to apply pulsed voltage to the pair of electrodes, a wavelength selecting element provided in the laser resonator, a spectral width varying unit provided in the laser resonator, and a controller. The controller is configured to measure a duty in a predetermined period before starting the second burst oscillation and a length of a suspension period from a time of ending the first burst oscillation to a time of starting the second burst oscillation, and perform a first control of the spectral width varying unit based on the duty and the length of the suspension period.
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