Patents by Inventor Hirokazu Ishizuka

Hirokazu Ishizuka 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: 20190329240
    Abstract: A conventional solution exchanging method in a next-generation sequencer needs a reagent amount four or more times greater than an in-flow cell flow passage volume in order to efficiently promote a chemical reaction by replacing a reagent A in the flow cell with a new reagent B. Thus, the reagent consumption amount increases, and the cost is high. Meanwhile, an analysis apparatus according to the present invention is provided with: a flow cell used for analyzing samples; a sample container for containing a sample; a reagent container for containing a reagent; and a pressure generation mechanism for feeding the sample and the reagent to the flow cell through the flow passage, and also has an atmospheric opening in the flow passage of the flow cell on the upstream side.
    Type: Application
    Filed: February 17, 2016
    Publication date: October 31, 2019
    Inventors: Hirokazu KATO, Tatsuya YAMASHITA, Junji ISHIZUKA, Tomohiro SHOJI, Toshinari SAKURAI
  • Publication number: 20190203034
    Abstract: Disclosed is a film adherable to polystyrene on at least one surface thereof.
    Type: Application
    Filed: August 29, 2017
    Publication date: July 4, 2019
    Applicant: Asahi Kasei Pax Corporation
    Inventors: Hirokazu ISHIZUKA, Toshiaki OHNO
  • Patent number: 8837955
    Abstract: It is aimed to provide a phase modulation apparatus that realizes high-precision phase modulation in high-speed phase modulation of dual optical pulses. A phase modulator 105 included in the phase modulation apparatus, when a dual optical pulse with a time difference composed of a signal optical pulse SP and a reference optical pulse RP passes therethrough, phase-modulates this dual optical pulse in proportion to an applied voltage of an electrical pulse. As a result, a phase-modulated SP? and a phase-modulated RP? are output. A modulation signal generator 106 outputs an electrical pulse of a predetermined bias at an input timing of a trigger signal, according to an input of a four-valued data signal, for example. The modulation signal generator 106 outputs, for one input of the trigger signal, a dual electrical pulse having a time difference and having opposite polarities.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: September 16, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tsuyoshi Nishioka, Hirokazu Ishizuka
  • Publication number: 20110229146
    Abstract: It is aimed to provide a phase modulation apparatus that realizes high-precision phase modulation in high-speed phase modulation of dual optical pulses. A phase modulator 105 included in the phase modulation apparatus, when a dual optical pulse with a time difference composed of a signal optical pulse SP and a reference optical pulse RP passes therethrough, phase-modulates this dual optical pulse in proportion to an applied voltage of an electrical pulse. As a result, a phase-modulated SP? and a phase-modulated RP? are output. A modulation signal generator 106 outputs an electrical pulse of a predetermined bias at an input timing of a trigger signal, according to an input of a four-valued data signal, for example. The modulation signal generator 106 outputs, for one input of the trigger signal, a dual electrical pulse having a time difference and having opposite polarities.
    Type: Application
    Filed: September 22, 2008
    Publication date: September 22, 2011
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tsuyoshi Nishioka, Hirokazu Ishizuka
  • Patent number: 7894604
    Abstract: Provided is a quantum cryptography communication apparatus capable of preventing a go photon pulse from being phase modulated and also capable of freely selecting any repetitive frequency of a light source.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: February 22, 2011
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tsuyoshi Nishioka, Toshio Hasegawa, Hirokazu Ishizuka
  • Patent number: 7649996
    Abstract: A qubit generating unit generates a qubit having a predetermined quantum state. A qubit encoding unit performs quantum encoding of the generated qubit. A first pseudo-random number generating unit generates a first pseudo-random number from secretly shared information, which has been secretly shared with the quantum receiving device in advance. A quantum modulator performs quantum modulation of the qubit on which quantum encoding has been performed based on the first pseudo-random number and sends the modulated qubit to the quantum receiving device. A second pseudo-random number generating unit generates a second pseudo-random number from secretly shared information which has been secretly shared with the above quantum sending device in advance synchronously with generation of the above first pseudo-random number.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: January 19, 2010
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tsuyoshi Nishioka, Hirokazu Ishizuka, Toshio Hasegawa
  • Publication number: 20080144823
    Abstract: A wavelength demultiplexer demultiplexes a wavelength multiplexed incident photon pulse string based on wavelengths of the photons in the photon pulse string. Each of a plurality of photon detectors detects a photon that is demultiplexed by the wavelength demultiplexer and outputs a signal based on detected photon, and a bias applying unit applies a gate pulse as a bias voltage to at least some of the photon detectors to match an incidence timing of an output light of the wavelength demultiplexer to the photon detectors. A data processor converts the signals from the photon detectors into time series signals.
    Type: Application
    Filed: July 12, 2004
    Publication date: June 19, 2008
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Jun'ichi Abe, Katsuhiro Shimizu, Toshio Hasegawa, Tsuyoshi Nishioka, Hirokazu Ishizuka
  • Publication number: 20070297684
    Abstract: An objective, when extracting from data such as an image, an audio, and a moving picture, is to extract the information from raw data that has not been processed for extraction, extract many different items of information for different purposes from the same data, and increase the amount of information that can be extracted. In a mobile phone with camera 101, a photographing section 204 photographs an image. A data analyzing section 207 analyses the image based on analysis definition information, which is stored in a definition storing section 201, to define how much data in which part to be read in what order when extracting information from the image. A data converting section 208 extracts information from the image based on code definition information, which is stored in the definition storing section 201, to define a method of computing data taken out according to the analysis definition information.
    Type: Application
    Filed: December 16, 2004
    Publication date: December 27, 2007
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hirokazu Ishizuka, Tsuyoshi Nishioka, Toshio Hasegawa, Toyohiro Tsurumaru
  • Patent number: 7260222
    Abstract: Each of a transmitter (1) and a receiver (2) divides temporarily-shared data into one or more purification blocks and one or more disposable blocks, and mixes each purification block so as to enlarge a Hamming distance between corresponding purification blocks being held by the transmitter (1) and the receiver (2) by using a Hamming distance amplification effect. The transmitter (1) Vernam-encrypts the mixed data with the disposable data and transmits the mixed data to the receiver (2), and the receiver (2) decrypts the received Vernam-encrypted data by using a disposable block owned thereby, and compares the Hamming distance between the purification block owned thereby with the mixed data with a predetermined value so as to judge whether each purification block can be shared between the transmitter (1) and the receiver (2).
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: August 21, 2007
    Assignees: National Institute of Information and Communications Technology, Communications Research Laboratory, Independent Administrative Institution
    Inventors: Hirokazu Ishizuka, Akihiro Yamamura
  • Publication number: 20070182968
    Abstract: Provided is a quantum cryptography communication apparatus capable of preventing a go photon pulse from being phase modulated and also capable of freely selecting any repetitive frequency of a light source.
    Type: Application
    Filed: May 17, 2004
    Publication date: August 9, 2007
    Inventors: Tsuyoshi Nishioka, Toshio Hasegawa, Hirokazu Ishizuka
  • Publication number: 20050157875
    Abstract: A qubit generating unit 40 generates a qubit having a predetermined quantum state. A qubit encoding unit 70 performs quantum encoding of the generated qubit. A first pseudo-random number generating unit 60 generates a first pseudo-random number from secretly shared information 3 which has been secretly shared with the quantum receiving device 200 in advance. A quantum modulator 80 performs quantum modulation of the qubit on which quantum encoding has been performed based on the first pseudo-random number and sends the modulated qubit to the quantum receiving device 200. A second pseudo-random number generating unit 220 generates a second pseudo-random number from secretly shared information 21 which has been secretly shared with the above quantum sending device 100 in advance synchronously with generation of the above first pseudo-random number. A qubit demodulator 230 performs quantum demodulation of the qubit which has been received from the quantum demodulator 80 based on the second pseudo-random number.
    Type: Application
    Filed: September 26, 2002
    Publication date: July 21, 2005
    Inventors: Tsuyoshi Nishioka, Hirokazu Ishizuka, Toshio Hasegawa
  • Patent number: 6778314
    Abstract: In case of the high-speed operation, it is difficult to ignore the time required for the voltage to rise to the level of voltage to be applied and the time to fall to 0V when the voltage is applied to the phase modulator. The first phase modulator 71 and the second phase modulator 73 are connected in parallel, and the optical path is switched by the switching unit 55 of the control unit 51 between the first optical switch 33 and the second optical switch 35. The switching unit 55 of the control unit 51 supplies the phase modulation data 31 stored in the phase modulation data memory 53 to the first voltage generating unit 57 or the second voltage generating unit 59 to generate the voltage necessary for the phase modulation.
    Type: Grant
    Filed: March 11, 2003
    Date of Patent: August 17, 2004
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshio Hasegawa, Tsuyoshi Nishioka, Hirokazu Ishizuka
  • Publication number: 20040005056
    Abstract: An optical system of a transmission device for quantum cryptograph includes a Faraday mirror and a phase modulator. The phase modulator has multiple refractivity, and it is inevitable to lose an extreme amount of input due to the configuration of the optical path. As a result, the S/N ratio is reduced, which makes an adjustment at start time difficult. A light pulse incident to the transmission device includes two light pulses of the TE polarization wave and the TM polarization wave for a phase modulator 8. The light pulse of the TE polarization wave is changed to the TM polarization wave by a Faraday mirror 7, and the TM polarization wave is changed to the TE polarization wave by rotating the polarization plate and reflecting by the Faraday mirror 7, and output from the transmission device. Two polarization beam splitters 5 and 6 are used so that the light pulse of the TM polarization wave should bypass the phase modulator 8. Only light pulse of the TE polarization wave is carried to the phase modulator 8.
    Type: Application
    Filed: March 7, 2003
    Publication date: January 8, 2004
    Inventors: Tsuyoshi Nishioka, Toshio Hasegawa, Hirokazu Ishizuka
  • Publication number: 20030184840
    Abstract: In case of the high-speed operation, it is difficult to ignore the time required for the voltage to rise to the level of voltage to be applied and the time to fall to 0V when the voltage is applied to the phase modulator. The first phase modulator 71 and the second phase modulator 73 are connected in parallel, and the optical path is switched by the switching unit 55 of the control unit 51 between the first optical switch 33 and the second optical switch 35. The switching unit 55 of the control unit 51 supplies the phase modulation data 31 stored in the phase modulation data memory 53 to the first voltage generating unit 57 or the second voltage generating unit 59 to generate the voltage necessary for the phase modulation.
    Type: Application
    Filed: March 11, 2003
    Publication date: October 2, 2003
    Inventors: Toshio Hasegawa, Tsuyoshi Nishioka, Hirokazu Ishizuka
  • Publication number: 20030188242
    Abstract: Each of a transmitter (1) and a receiver (2) divides temporarily-shared data into one or more purification blocks and one or more disposable blocks, and mixes each purification block so as to enlarge a Hamming distance between corresponding purification blocks being held by the transmitter (1) and the receiver (2) by using a Hamming distance amplification effect. The transmitter (1) Vernam-encrypts the mixed data with the disposable data and transmits the mixed data to the receiver (2), and the receiver (2) decrypts the received Vernam-encrypted data by using a disposable block owned thereby, and compares the Hamming distance between the purification block owned thereby with the mixed data with a predetermined value so as to judge whether each purification block can be shared between the transmitter (1) and the receiver (2).
    Type: Application
    Filed: May 14, 2003
    Publication date: October 2, 2003
    Inventors: Hirokazu Ishizuka, Akihiko Yamamura