Patents by Inventor Takuya Kanai

Takuya Kanai 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: 20220239375
    Abstract: An optical communication system includes a first optical communication device and a second optical communication device that transmit and receive an optical signal via an optical transmission line. The optical transmission line includes: a first section optical transmission line connected to the first optical communication device; and a second section optical transmission line connected to the second optical communication device and having fewer reflection points of the optical signal than the first section optical transmission line.
    Type: Application
    Filed: June 11, 2019
    Publication date: July 28, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Masamichi FUJIWARA, Ryo lGARASHI, Takuya KANAI
  • Patent number: 11389389
    Abstract: A cosmetic including at least one cyclic silicone represented by formula (1), and having a boiling point of 205 to 255° C. and a viscosity of less than 5 mm2/s (25° C.). This cosmetic has a light touch, a good spread, and excellent water repellency, forms a uniform cosmetic film, can achieve a feeling of use without a strong oily feeling, and has stability over time and cosmetic persistence when a variety of oil such as a silicone, hydrocarbon oil, and ester, an organic ultraviolet absorber, or an oily component being solid at 25° C. is mixed. (Wherein R1 is a monovalent hydrocarbon group having 2 or 3 carbon atoms, R2, R3, R4, R5, and R6 are each independently a monovalent hydrocarbon group having 1 to 3 carbon atoms, “a” is a positive number satisfying 0<a<4, and “b” and “c” are each independently a number of 0 to 3, provided that (a+b+c)?4.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: July 19, 2022
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Masanao Kamei, Tomoya Kanai, Takuya Abe, Ryuichi Inaba, Tsuneo Kimura
  • Publication number: 20220113478
    Abstract: A wavelength-selective optical reception device includes a photoreceptor (21) that converts optical signals (201) into electric signals and outputs the electric signals, a base (31) on which the photoreceptor (21) is provided, a housing (41) that is mounted on the base (31) and surrounds the photoreceptor (21) along with the base (31), and that is provided with a window (51) to pass optical signals (203) including the optical signals (201) and including optical signals (202) of a wavelength different from a first wavelength of the optical signals (201) and a window (52) to pass the optical signals (202), and an optical filter (61) that is disposed inside the housing between the window (51) and the photoreceptor (21) along the optical axis (205) of the optical signals (203), and that outputs, out of the optical signals (203) that enter thereto, the optical signals (201) toward the photoreceptor (21), and reflects the optical signals (202) toward a near side in a direction of travel of the optical signals (203)
    Type: Application
    Filed: January 31, 2020
    Publication date: April 14, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takuya KANAI, Takeshi IMAI, Yumiko SENOO, Kota ASAKA
  • Patent number: 11258510
    Abstract: A wavelength-tunable optical filter control apparatus in an optical access system that uses wavelength-multiplexed optical signal of a plurality of wavelength channels includes a wavelength-tunable optical filter configured to pass an optical signal of a specific wavelength channel among the plurality of wavelength channels; a light receiving element configured to convert the optical signal that has passed through the wavelength-tunable optical filter into an electrical signal; a signal quality determining unit configured to determine a quality of the electrical signal; and a wavelength-tunable optical filter control unit configured to acquire a light intensity of the electrical signal and control a wavelength of the wavelength-tunable optical filter based on the acquired light intensity and a determination result of the quality of the electrical signal.
    Type: Grant
    Filed: May 9, 2019
    Date of Patent: February 22, 2022
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takeshi Imai, Takuya Kanai, Kota Asaka
  • Publication number: 20220043253
    Abstract: An optical wavelength selecting filter-module into which light is incident from a prescribed direction determined in advance, the optical wavelength-selective filter module including: an optical filter of which an orientation can be changed; a frequency information acquiring unit which acquires frequency information that is information indicating a frequency of light to be transmitted through the optical filter; a temperature information acquiring unit which acquires temperature information that indicates a temperature of the optical filter; a determining unit which determines an orientation of the optical filter based on relationship information that is information associating, for each prescribed frequency, the temperature and an orientation of the optical filter at which light of the frequency is transmitted through the optical filter at transmittance equal to or higher than prescribed transmittance at the temperature, a temperature indicated by the temperature information, and a frequency indicated by the
    Type: Application
    Filed: December 5, 2019
    Publication date: February 10, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Takeshi IMAI, Takuya KANAI, Yumiko SENOO, Kota ASAKA
  • Publication number: 20210399809
    Abstract: Upon receipt of a coherent optical signal that includes a training signal generated using a code sequence constituted by multi-value phase modulation symbols, in which a deviation angle of a vector average of a one-symbol delay differential component of a signal generated on the basis of the code sequence has a prescribed angle and a modulation phase difference between adjacent symbols has a fixed, repeated pattern, a reception training signal corresponding to a training code sequence for frequency offset estimation is detected within a reception signal acquired by converting the received coherent optical signal into an electric signal, a plurality of delay differential components are calculated on the basis of the detected reception training signal and at least two delay signals of the reception training signal, each delay signal having a different number of delay symbols, and an averaged frequency offset amount is calculated using the calculated plurality of delay differential components.
    Type: Application
    Filed: August 30, 2019
    Publication date: December 23, 2021
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Ryo IGARASHI, Masamichi FUJIWARA, Takuya KANAI
  • Publication number: 20210111791
    Abstract: A wavelength-tunable optical filter control apparatus in an optical access system that uses wavelength-multiplexed optical signal of a plurality of wavelength channels includes a wavelength-tunable optical filter configured to pass an optical signal of a specific wavelength channel among the plurality of wavelength channels; a light receiving element configured to convert the optical signal that has passed through the wavelength-tunable optical filter into an electrical signal; a signal quality determining unit configured to determine a quality of the electrical signal; and a wavelength-tunable optical filter control unit configured to acquire a light intensity of the electrical signal and control a wavelength of the wavelength-tunable optical filter based on the acquired light intensity and a determination result of the quality of the electrical signal.
    Type: Application
    Filed: May 9, 2019
    Publication date: April 15, 2021
    Inventors: Takeshi Imai, Takuya Kanai, Kota Asaka