Patents by Inventor Etsu Hashimoto

Etsu Hashimoto 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).

  • Patent number: 10006831
    Abstract: An end face observation device (101) of this invention includes a first lens (12) including a missing portion (1200) extending through in an optical axis direction, a light source (14) configured to generate light that irradiates an end face (200A) of an observation target via the first lens, and an image capturing element (15) configured to receive an image of the end face of the observation target via the first lens. This can implement an end face observation device that integrates a structure configured to operate the end face of the observation target with an observation device configured to observe the end face by inserting the structure configured to operate the end face of the observation target into the missing portion of the first lens.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: June 26, 2018
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yuichi Higuchi, Koichi Hadama, Joji Yamaguchi, Toru Miura, Etsu Hashimoto
  • Patent number: 9588300
    Abstract: An optical input/output device includes a phase modulator element and an optical element. The phase modulator element includes a plurality of pixels arranged in a matrix and is configured to change an optical phase of signal light by applying a driving signal corresponding to a phase pattern. The optical element is configured to convert a direction of exit of the signal light so as to irradiate each pixel with the signal light from the input port. A pattern generator unit includes superimposing means for superimposing a periodic phase pattern having a predetermined period in at least one direction in a plane of the phase modulator element, and means for controlling an amplitude of the periodic phase pattern. The signal light is diffracted to a position according to the period of the superimposed periodic phase pattern, so that light intensity of the signal light is dispersed.
    Type: Grant
    Filed: December 6, 2013
    Date of Patent: March 7, 2017
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Mitsumasa Nakajima, Keita Yamaguchi, Joji Yamaguchi, Yuzo Ishii, Koichi Hadama, Naru Nemoto, Etsu Hashimoto, Kazunori Seno, Kenya Suzuki, Yoshito Jin
  • Publication number: 20160313211
    Abstract: An end face observation device (101) of this invention includes a first lens (12) including a missing portion (1200) extending through in an optical axis direction, a light source (14) configured to generate light that irradiates an end face (200A) of an observation target via the first lens, and an image capturing element (15) configured to receive an image of the end face of the observation target via the first lens. This can implement an end face observation device that integrates a structure configured to operate the end face of the observation target with an observation device configured to observe the end face by inserting the structure configured to operate the end face of the observation target into the missing portion of the first lens.
    Type: Application
    Filed: December 16, 2014
    Publication date: October 27, 2016
    Inventors: Yuichi Higuchi, Koichi Hadama, Joji Yamaguchi, Toru Miura, Etsu Hashimoto
  • Patent number: 9294826
    Abstract: A wavelength selection switch system includes a wavelength selection switch including an input port and an output port, a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored, a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory and that stores a copy of the configuration information stored in the nonvolatile memory, and a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory, wherein the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: March 22, 2016
    Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics Corporation
    Inventors: Tomoyoshi Kataoka, Mitsunori Fukutoku, Etsu Hashimoto, Akio Sahara, Norio Sato, Yosuke Takeuchi
  • Patent number: 9247324
    Abstract: A wavelength selection switch system includes a wavelength selection switch including an input port and an output port, a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored, a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory and that stores a copy of the configuration information stored in the nonvolatile memory, and a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory, wherein the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.
    Type: Grant
    Filed: February 5, 2013
    Date of Patent: January 26, 2016
    Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics Corporation
    Inventors: Tomoyoshi Kataoka, Mitsunori Fukutoku, Etsu Hashimoto, Akio Sahara, Norio Sato, Yosuke Takeuchi
  • Publication number: 20150316725
    Abstract: An optical input/output device includes a phase modulator element and an optical element. The phase modulator element includes a plurality of pixels arranged in a matrix and is configured to change an optical phase of signal light by applying a driving signal corresponding to a phase pattern. The optical element is configured to convert a direction of exit of the signal light so as to irradiate each pixel with the signal light from the input port. A pattern generator unit includes superimposing means for superimposing a periodic phase pattern having a predetermined period in at least one direction in a plane of the phase modulator element, and means for controlling an amplitude of the periodic phase pattern. The signal light is diffracted to a position according to the period of the superimposed periodic phase pattern, so that light intensity of the signal light is dispersed.
    Type: Application
    Filed: December 6, 2013
    Publication date: November 5, 2015
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Mitsumasa Nakajima, Keita Yamaguchi, Joji Yamaguchi, Yuzo Ishii, Koichi Hadama, Naru Nemoto, Etsu Hashimoto, Kazunori Seno, Kenya Suzuki, Yoshito Jin
  • Publication number: 20150030327
    Abstract: A wavelength selection switch system includes a wavelength selection switch including an input port and an output port, a nonvolatile memory in which configuration information for controlling an operation of the wavelength selection switch is stored, a high-speed memory in which reading and writing can be performed at a higher speed than in the nonvolatile memory and that stores a copy of the configuration information stored in the nonvolatile memory, and a control unit that controls an operation of the wavelength selection switch based on the configuration information read from the high-speed memory, wherein the control unit periodically reads the configuration information stored in the nonvolatile memory and writes a copy of the read configuration information to the high-speed memory.
    Type: Application
    Filed: February 5, 2013
    Publication date: January 29, 2015
    Applicants: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NTT Electronics Corporation
    Inventors: Tomoyoshi Kataoka, Mitsunori Fukutoku, Etsu Hashimoto, Akio Sahara, Norio Sato, Yosuke Takeuchi
  • Patent number: 8699832
    Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.
    Type: Grant
    Filed: March 29, 2010
    Date of Patent: April 15, 2014
    Assignees: Nippon Telegraph and Telephone Corporation, NTT Electronics Corporation
    Inventors: Nobuaki Matsuura, Koichi Hadama, Etsu Hashimoto, Yuzo Ishii, Mitsuo Usui, Tohru Matsuura, Toshiki Nishizawa, Yuji Mitsuhashi
  • Patent number: 8599460
    Abstract: A movable beam (182a) and a movable beam (182b) each having one end fixed to a frame portion (181) of a mirror substrate (108) are provided inside the frame portion (181). The movable beam (182a) and the movable beam (182b) each having one end fixed to a corresponding to one of two opposite inner sides of the frame portion (181) are aligned at a predetermined distance on the same line in the direction in which the two sides face each other. Each of the movable beam (182a) and the movable beam (182b) has the other end displaceable in the normal line direction of the mirror substrate (108) and therefore has a cantilever structure. A mirror (183) is arranged between the movable beam (182a) and the movable beam (182b) and connected to them via a pair of connectors (109a, 109b).
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: December 3, 2013
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Mitsuo Usui, Shingo Uchiyama, Fusao Shimokawa, Etsu Hashimoto, Johji Yamaguchi, Tohru Matsuura, Toshifumi Konishi
  • Publication number: 20120093458
    Abstract: A light-shielding portion (10) shields the light spot of output light output toward a shunt position ? by a projecting portion (12). Hence, the output light output toward the shunt position ? does not travel to an output port (111). This allows to prevent crosstalk.
    Type: Application
    Filed: March 29, 2010
    Publication date: April 19, 2012
    Inventors: Nobuaki Matsuura, Koichi Hadama, Etsu Hashimoto, Yuzo Ishii, Mitsuo Usui, Tohru Matsuura, Toshiki Nishizawa, Yuji Mitsuhashi
  • Publication number: 20100118372
    Abstract: A movable beam (182a) and a movable beam (182b) each having one end fixed to a frame portion (181) of a mirror substrate (108) are provided inside the frame portion (181). The movable beam (182a) and the movable beam (182b) each having one end fixed to a corresponding to one of two opposite inner sides of the frame portion (181) are aligned at a predetermined distance on the same line in the direction in which the two sides face each other. Each of the movable beam (182a) and the movable beam (182b) has the other end displaceable in the normal line direction of the mirror substrate (108) and therefore has a cantilever structure. A mirror (183) is arranged between the movable beam (182a) and the movable beam (182b) and connected to them via a pair of connectors (109a, 109b).
    Type: Application
    Filed: April 15, 2008
    Publication date: May 13, 2010
    Inventors: Mitsuo Usui, Shingo Uchiyama, Fusao Shimokawa, Etsu Hashimoto, Johji Yamaguchi, Tohru Matsuura, Toshifumi Konishi
  • Patent number: 7139491
    Abstract: Extremely advanced technology for scrambling an optical signal based on quantum mechanical fluctuation is used to provide a highly reliable optical communication method which can invalidate illicit activities such as wire-tapping, a system, and a laser oscillator which is used in the method and system. A transmitter side generates laser light, simultaneously oscillated at a plurality of wavelengths, the total number of generated photons being constant, and transmits a signal light comprising data which has been added to the light of the plurality of wavelengths; and at a receiving side, light, simultaneously oscillated at the plurality of wavelengths, is selected from the signal light, and the data is demodulated.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: November 21, 2006
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yoshitada Katagiri, Etsu Hashimoto, Kenichi Suzuki
  • Publication number: 20060193636
    Abstract: Extremely advanced technology for scrambling an optical signal based on quantum mechanical fluctuation is used to provide a highly reliable optical communication method which can invalidate illicit activities such as wire-tapping, a system, and a laser oscillator which is used in the method and system. A transmitter side generates laser light, simultaneously oscillated at a plurality of wavelengths, the total number of generated photons being constant, and transmits a signal light comprising data which has been added to the light of the plurality of wavelengths; and at a receiving side, light, simultaneously oscillated at the plurality of wavelengths, is selected from the signal light, and the data is demodulated.
    Type: Application
    Filed: April 13, 2006
    Publication date: August 31, 2006
    Inventors: Yoshitada Katagiri, Etsu Hashimoto, Kenichi Suzuki
  • Patent number: 7050723
    Abstract: Extremely advanced technology for scrambling an optical signal based on quantum mechanical fluctuation is used to provide a highly reliable optical communication method which can invalidate illicit activities such as wire-tapping, a system, and a laser oscillator which is used in the method and system. A transmitter side generates laser light, simultaneously oscillated at a plurality of wavelengths, the total number of generated photons being constant, and transmits a signal light comprising data which has been added to the light of the plurality of wavelengths; and at a receiving side, light, simultaneously oscillated at the plurality of wavelengths, is selected from the signal light, and the data is demodulated.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: May 23, 2006
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yoshitada Katagiri, Etsu Hashimoto, Kenichi Suzuki
  • Patent number: 7024122
    Abstract: In an ultrahigh-speed clock extraction circuit wherein a local pulse generating light source 22 for generating a local optical pulse stream synchronized in bit phase with an input optical signal pulse stream is placed in a phase-locked loop, when repetition frequencies of the input optical signal pulse stream and the local optical pulse stream bear a particular relationship, a frequency demultiplier 32 and multipliers 43 and 52 are set so that the frequency of a modulation signal for an optical modulator 41 and a frequency which is a natural-number multiple of the modulation signal frequency, and the frequency of a down-converted version of an optical pulse stream output from a photodetector 42 differ from each other.
    Type: Grant
    Filed: November 1, 2002
    Date of Patent: April 4, 2006
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kentaro Uchiyama, Hidehiko Takara, Eiichi Yamada, Etsu Hashimoto, Toshio Morioka
  • Publication number: 20040196876
    Abstract: Extremely advanced technology for scrambling an optical signal based on quantum mechanical fluctuation is used to provide a highly reliable optical communication method which can invalidate illicit activities such as wire-tapping, a system, and a laser oscillator which is used in the method and system. A transmitter side generates laser light, simultaneously oscillated at a plurality of wavelengths, the total number of generated photons being constant, and transmits a signal light comprising data which has been added to the light of the plurality of wavelengths; and at a receiving side, light, simultaneously oscillated at the plurality of wavelengths, is selected from the signal light, and the data is demodulated.
    Type: Application
    Filed: January 14, 2002
    Publication date: October 7, 2004
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Yoshitada Katagiri, Etsu Hashimoto, Kenichi Suzuki
  • Patent number: 6695471
    Abstract: A temperature meter for measuring temperature of a measurement target object to which a temperature sensor cannot be fixed directly is formed by a temperature sensor configured to measure an observed temperature in a vicinity of the measurement target object; a timer configured to measure a temperature observation time; and a calculation processor configured to calculate the temperature of the measurement target object according to the observed temperature and the temperature observation time by carrying out a prescribed calculation processing.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: February 24, 2004
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Etsu Hashimoto, Yoshitada Katagiri, Tetsuo Abe, Yoshio Suzuki
  • Publication number: 20030117196
    Abstract: In an ultrahigh-speed clock extraction circuit wherein a local pulse generating light source 22 for generating a local optical pulse stream synchronized in bit phase with an input optical signal pulse stream is placed in a phase-locked loop, when repetition frequencies of the input optical signal pulse stream and the local optical pulse stream bear a particular relationship, a frequency demultiplier 32 and multipliers 43 and 52 are set so that the frequency of a modulation signal for an optical modulator 41 and a frequency which is a natural-number multiple of the modulation signal frequency, and the frequency of a down-converted version of an optical pulse stream output from a photodetector 42 differ from each other.
    Type: Application
    Filed: November 1, 2002
    Publication date: June 26, 2003
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kentaro Uchiyama, Hidehiko Takara, Eiichi Yamada, Etsu Hashimoto, Toshio Morioka
  • Patent number: 6560007
    Abstract: A phase-lock loop is formed by a voltage-controlled oscillator, a local optical pulse source, an optical branching device for branching the locally generated optical pulse stream from the local optical pulse source, a harmonic component local generation part for locally generating a harmonic component electrical signal from the one of two branched locally generated optical pulse streams, and a phase comparison part for comparing the phases of the locally generated harmonic component electrical signal and an incoming signal component electrical signal generated from an incoming optical signal pulse stream and for supplying the voltage-controlled oscillator with a control voltage corresponding to the phase difference between the two input electrical signals. The other branched output from the optical branching device is output as a locally generated optical pulse stream bit-phase synchronized with the incoming optical signal pulse stream.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: May 6, 2003
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Kentaro Uchiyama, Etsu Hashimoto, Wataru Imajuku
  • Publication number: 20030007545
    Abstract: A temperature meter for measuring temperature of a measurement target object to which a temperature sensor cannot be fixed directly is formed by a temperature sensor configured to measure an observed temperature in a vicinity of the measurement target object; a timer configured to measure a temperature observation time; and a calculation processor configured to calculate the temperature of the measurement target object according to the observed temperature and the temperature observation time by carrying out a prescribed calculation processing.
    Type: Application
    Filed: June 26, 2002
    Publication date: January 9, 2003
    Inventors: Etsu Hashimoto, Yoshitada Katagiri, Tetsuo Abe, Yoshio Suzuki