Patents by Inventor Hiroyasu Ishii

Hiroyasu Ishii 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).

  • Publication number: 20210046190
    Abstract: An object to be achieved by the present invention is to provide a technique for enhancing the anticancer effect of ubenimex; in particular, enhancing its anticancer effect on solid cancer. This object can be achieved by a compound containing a chain structure in which a plurality of ubenimex molecules is linked to a chain polymer.
    Type: Application
    Filed: January 30, 2019
    Publication date: February 18, 2021
    Inventors: Masaki MORI, Hideshi ISHII, Masamitsu KONNO, Hidetoshi EGUCHI, Naotsugu HARAGUCHI, Reishi TOSHIYAMA, Nobuhiro NISHIYAMA, Hiroyasu TAKEMOTO
  • Publication number: 20200412078
    Abstract: The laser device includes a laser crystal, a resonator including a pair of mirrors between which the laser crystal is interposed, a Q switch that is disposed on an optical path of the resonator and controls a Q value of the resonator, and a Brewster thin-film polarizer that is disposed on the optical path of the resonator and transmits selectively p-polarized light. The thin-film polarizer has wavelength selectivity in which a p-polarized light transmittance at a first wavelength exhibiting a maximum gain of the laser crystal is 5% or more to 25% or less, the p-polarized light transmittance monotonically increases as a wavelength becomes longer than the first wavelength, and a maximum transmittance is exhibited at a third wavelength. The laser device oscillates laser light at a second wavelength that is a wavelength longer than the first wavelength and shorter than or equal to the third wavelength.
    Type: Application
    Filed: September 11, 2020
    Publication date: December 31, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyasu ISHII, Takatsugu WADA
  • Publication number: 20200345237
    Abstract: A photoacoustic apparatus includes a laser light irradiating unit that irradiates an inside of a subject with pulsed light; a photoacoustic signal acquiring unit that acquires a photoacoustic signal from a photoacoustic wave from the subject; a light amount detecting unit that detects a light amount of the pulsed light; a correlation data memory that stores first correlation data and second correlation data; an energy estimating unit that estimates an energy on the basis of the amount of the pulsed light and the first correlation data; a pulse width estimating unit that estimates a pulse width on the basis of the estimated energy and the second correlation data; and a photoacoustic signal correcting unit that corrects the photoacoustic signal on the basis of a first difference between the estimated energy and a reference energy and a second difference between the estimated pulse width and a reference pulse width.
    Type: Application
    Filed: July 13, 2020
    Publication date: November 5, 2020
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyasu ISHII, Keiji TSUBOTA
  • Patent number: 10608405
    Abstract: A solid-state laser device includes a resonator composed of a pair of mirrors, a laser rod disposed in the resonator, and a laser chamber. The resonator and the laser rod are disposed in a housing. The laser rod is inserted through a hole of the laser chamber and is supported in a state in which two end portions are exposed. An O-ring is disposed at an exposed root of at least one rod end portion exposed from the laser chamber. The solid-state laser device includes a cover member that is disposed on a rod side surface of the rod end portion between the O-ring and a rod end surface and that blocks incidence of stray light, which is generated in the housing, on the O-ring.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: March 31, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Hiroyasu Ishii, Dai Murakoshi, Takatsugu Wada
  • Patent number: 10587088
    Abstract: A solid-state laser device includes a laser rod made of an alexandrite crystal; a flash lamp that outputs excitation light for exciting the laser rod, a glass tube for a lamp being made of quartz glass that at least blocks deep ultraviolet light having a wavelength of 200 nm to 300 nm, and transmits visible light having a wavelength of 400 nm or more; and a laser chamber that contains a tubular reflector that includes a hole part containing at least a portion of the laser rod or a portion of the flash lamp and is made of a porous material of polytetrafluoroethylene, an inner wall surface of the hole part being as a reflecting surface that reflects the excitation light.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: March 10, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Takatsugu Wada, Hiroyasu Ishii, Tomoki Inoue, Keiji Tsubota
  • Patent number: 10581337
    Abstract: A diode rectifier rectifies an AC voltage output from a neutral-grounding three-phase AC power supply to a DC voltage. A smoothing capacitor smoothes the DC voltage rectified by the diode rectifier. An inverter converts the DC voltage smoothed by the smoothing capacitor into a desired AC voltage. A bidirectional switch and a Y capacitor are connected in series between one end of the smoothing capacitor and the ground. A detector detects a voltage across both ends of the smoothing capacitor. A controller drives the bidirectional switch in response to an output of the detector.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: March 3, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasushige Mukunoki, Yasushi Nakayama, Hiroyasu Iwabuki, Yuki Ishii, Keisuke Iwasawa
  • Patent number: 10530112
    Abstract: Provided is a solid-state laser device in which a linear resonator including an output mirror and a rear mirror, a laser rod, and optical members are provided on a common base and are contained in a housing having the base as a portion. A holding part is provided to hold an excitation light source that extends parallel to the laser rod on a side of the laser rod opposite to the base. The optical members including a Q-switch are disposed between the laser rod and the rear mirror. An upper end position of the output mirror is at a position lower than a lower end position of the excitation light source held by the holding part, with the base as a reference. The holding part holds the excitation light source so as to be capable of being inserted and extracted with respect to the output mirror side in a longitudinal direction of the excitation light source.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: January 7, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Hiroyasu Ishii, Takatsugu Wada, Keiji Tsubota
  • Publication number: 20190275474
    Abstract: The present invention provides a titanosilicate separation membrane which can also be used for separating a mixed gas containing a molecule having a relatively small size, has high durability in a high temperature environment, and has a high permeation rate and a high selectivity for a mixed gas containing water vapor. A titanosilicate separation membrane has a CHA-type titanosilicate crystal structure formed on a porous support, wherein aluminum is not substantially contained in the backbone of the titanosilicate crystal structure, and the titanosilicate crystal structure is constituted by silicon, oxygen, and titanium.
    Type: Application
    Filed: March 6, 2019
    Publication date: September 12, 2019
    Inventors: Satoshi IMASAKA, Sadao Araki, Hideki Yamamoto, Hiroyasu Ishii
  • Patent number: 10276998
    Abstract: In a solid-state laser device and a photoacoustic measurement device including the solid-state laser device, the distance between a laser rod and a flash lamp is narrowed. A shielding lid shields mirrors and an optical path of laser light from the outside. A first portion of a frame body of a laser chamber is exposed from the shielding lid. A flash lamp stored in the frame body of the laser chamber is able to be removed from and inserted into the first portion of the frame body. A thin film portion having a thickness smaller than the thickness of other portions of the shielding lid is provided in at least a part of a region of the shielding lid covering the optical path of a light beam on the outside in a longitudinal direction from the first portion of the frame body of the laser chamber.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: April 30, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Kazuhiro Hirota, Hiroyasu Ishii, Takuji Tada
  • Publication number: 20190097386
    Abstract: A solid-state laser device includes a resonator composed of a pair of mirrors, a laser rod disposed in the resonator, and a laser chamber. The resonator and the laser rod are disposed in a housing. The laser rod is inserted through a hole of the laser chamber and is supported in a state in which two end portions are exposed. An O-ring is disposed at an exposed root of at least one rod end portion exposed from the laser chamber. The solid-state laser device includes a cover member that is disposed on a rod side surface of the rod end portion between the O-ring and a rod end surface and that blocks incidence of stray light, which is generated in the housing, on the O-ring.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyasu ISHII, Dai MURAKOSHI, Takatsugu WADA
  • Publication number: 20190097382
    Abstract: A solid-state laser device includes a resonator composed of a pair of mirrors; a laser rod disposed in the resonator, the laser rod including an antireflection film on an end surface thereof and having a chamfered portion at a peripheral edge of the end surface; and an end-surface protection member that is disposed at a position facing the end surface of the laser rod, that has an opening defining portion that forms an opening whose diameter is smaller than a diameter of an outer periphery of the end surface, and that limits a laser light path region in the end surface of the laser rod to a region inside of the outer periphery of the end surface.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 28, 2019
    Applicant: FUJIFILM Corporation
    Inventor: Hiroyasu ISHII
  • Publication number: 20190097379
    Abstract: A solid-state laser device includes a laser rod made of an alexandrite crystal; a flash lamp that outputs excitation light for exciting the laser rod, a glass tube for a lamp being made of quartz glass that at least blocks deep ultraviolet light having a wavelength of 200 nm to 300 nm, and transmits visible light having a wavelength of 400 nm or more; and a laser chamber that contains a tubular reflector that includes a hole part containing at least a portion of the laser rod or a portion of the flash lamp and is made of a porous material of polytetrafluoroethylene, an inner wall surface of the hole part being as a reflecting surface that reflects the excitation light.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Takatsugu WADA, Hiroyasu ISHII, Tomoki INOUE, Keiji TSUBOTA
  • Publication number: 20190097376
    Abstract: Provided is a solid-state laser device in which a linear resonator including an output mirror and a rear mirror, a laser rod, and optical members are provided on a common base and are contained in a housing having the base as a portion. A holding part is provided to hold an excitation light source that extends parallel to the laser rod on a side of the laser rod opposite to the base. The optical members including a Q-switch are disposed between the laser rod and the rear mirror. An upper end position of the output mirror is at a position lower than a lower end position of the excitation light source held by the holding part, with the base as a reference. The holding part holds the excitation light source so as to be capable of being inserted and extracted with respect to the output mirror side in a longitudinal direction of the excitation light source.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyasu ISHII, Takatsugu WADA, Keiji TSUBOTA
  • Patent number: 10243317
    Abstract: Disclosed are a laser device which uses alexandrite crystal and is capable of suppressing abnormal oscillation even if the size thereof is reduced and suppressing damage to an AR coating on a Q switch or alexandrite crystal, and a photoacoustic measurement device. A laser rod 11 includes alexandrite crystal. A flash lamp 12 irradiates the laser rod 11 with excitation light. A resonator includes a pair of mirrors 14 and 15 with the laser rod 11 sandwiched therebetween. A Q switch 16 is inserted into the optical path of the resonator and controls the Q value of the resonator. A polarizer 17 is inserted into the resonator and is a non-coated Brewster polarizer which selectively transmits light in a predetermined polarization direction among light emitted from the laser rod.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: March 26, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Hiroyasu Ishii, Takatsugu Wada
  • Publication number: 20190021603
    Abstract: In a laser device that emits pulsed laser light by emitting excitation light to a laser medium in a state in which a first voltage is applied to a Q switch and changing the voltage applied to the Q switch from a first voltage to a second voltage after the emission of the excitation light, the application start timing of the first voltage during a normal operation is set to a timing at which the intensity of the pulsed laser light periodically changing due to the vibration of the Q switch is maximized.
    Type: Application
    Filed: September 26, 2018
    Publication date: January 24, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyasu ISHII, Kazuhiro HIROTA
  • Publication number: 20190021604
    Abstract: A Q switch is vibrated by applying a first voltage, and pulsed laser light is emitted by applying a second voltage to the Q switch at a point in time at which a preset delay time has passed from the start of emission of excitation light. Then, in this case, a time which is within a period, for which the vibration of the Q switch continues, and at which the intensity of the pulsed laser light periodically changing due to the vibration of the Q switch is maximized in a case where a point in time of application of the second voltage to the Q switch is changed is set as the delay time.
    Type: Application
    Filed: September 26, 2018
    Publication date: January 24, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyasu ISHII, Kazuhiro HIROTA
  • Publication number: 20170229830
    Abstract: In a solid-state laser device and a photoacoustic measurement device including the solid-state laser device, the distance between a laser rod and a flash lamp is narrowed. A shielding lid shields mirrors and an optical path of laser light from the outside. A first portion of a frame body of a laser chamber is exposed from the shielding lid. A flash lamp stored in the frame body of the laser chamber is able to be removed from and inserted into the first portion of the frame body. A thin film portion having a thickness smaller than the thickness of other portions of the shielding lid is provided in at least a part of a region of the shielding lid covering the optical path of a light beam on the outside in a longitudinal direction from the first portion of the frame body of the laser chamber.
    Type: Application
    Filed: September 15, 2016
    Publication date: August 10, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Kazuhiro HIROTA, Hiroyasu ISHII, Takuji TADA
  • Publication number: 20160226214
    Abstract: Disclosed are a laser device which uses alexandrite crystal and is capable of suppressing abnormal oscillation even if the size thereof is reduced and suppressing damage to an AR coating on a Q switch or alexandrite crystal, and a photoacoustic measurement device. A laser rod 11 includes alexandrite crystal. A flash lamp 12 irradiates the laser rod 11 with excitation light. A resonator includes a pair of mirrors 14 and 15 with the laser rod 11 sandwiched therebetween. A Q switch 16 is inserted into the optical path of the resonator and controls the Q value of the resonator. A polarizer 17 is inserted into the resonator and is a non-coated Brewster polarizer which selectively transmits light in a predetermined polarization direction among light emitted from the laser rod.
    Type: Application
    Filed: April 11, 2016
    Publication date: August 4, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Hiroyasu ISHII, Takatsugu WADA
  • Patent number: 9380237
    Abstract: A semiconductor integrated circuit includes: a plurality of current sources including a first transistor individually connected to a power source line and a bias line; and a plurality of bias blocks including a second transistor configured to constitute a current mirror circuit together with the first transistor, and to divide a reference current to be a reference of the current sources so that the reference current flows through the bias line.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: June 28, 2016
    Assignee: SONY CORPORATION
    Inventors: Hiroyasu Ishii, Tomohiro Takahashi
  • Patent number: 9025726
    Abstract: A radiation imaging apparatus includes a differential phase image producing section, a phase unwrapping section, a statistical operation section, and a correction processing section. The differential phase image producing section produces a differential phase image in which pixel values are wrapped into a predetermined range ?. The phase unwrapping section performs a phase unwrapping process to the differential phase image. The statistical operation section obtains a mode from statistical operation of pixel values in each subregion segmented in the unwrapped differential phase image. Each subregion is a unit in which error caused by the phase unwrapping process is to be corrected. The correction processing section calculates, for each pixel, an integer “n” which allows a difference ? between the mode and a pixel value of each pixel to satisfy n???/2??<n?+?/2, and subtracts n·? from each pixel value.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: May 5, 2015
    Assignee: FUJIFILM Corporation
    Inventor: Hiroyasu Ishii