Patents by Inventor Kiyoshi Onohara

Kiyoshi Onohara 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: 20220206145
    Abstract: A first optical path length from an emission surface of a first optical system to a reflection surface of a target object is calculated on the basis of first reflected light received by the first optical system and reference light generated by a splitter. A second optical path length from an emission surface of the second optical system to a reflection surface of a reflector is calculated on the basis of second reflected light reflected by the reflector and received by the second optical system and the reference light generated by the splitter A refractive index of a space is calculated on the basis of the second optical path length, and a distance from the emission surface of the first optical system to the reflection surface of the target object is calculated on the basis of the refractive index and the first optical path length.
    Type: Application
    Filed: March 17, 2022
    Publication date: June 30, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takanori YAMAUCHI, Hiroki GOTO, Kiyoshi ONOHARA, Naoki SUZUKI
  • Patent number: 11346651
    Abstract: The optical distance measurement device is configured in such a manner that the frequency-swept light output unit outputs frequency-swept light during a time period from when frequency sweeping of frequency-swept light being output is completed to when the next frequency sweeping becomes possible, the frequency-swept light output during the time period being frequency swept at a different frequency from the frequency-swept light being output.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: May 31, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kiyoshi Onohara, Hiroki Goto, Naoki Suzuki
  • Publication number: 20220158748
    Abstract: A transmission/reception device is configured to convert an optical signal based on a plurality of first optical signals having frequency bands different from each other into an electric signal and output the electric signal as a plurality of first electric signals; receive the plurality of first electric signals, change frequency bands of some or all of a plurality of second electric signals to narrow an interval between frequency bands of two second electric signals having frequency bands adjacent to each other, and output, as third electric signals, electric signals; to receive a plurality of the third electric signals, combine and output the plurality of third electric signals as a fourth electric signal; and receive the fourth electric signal, convert the fourth electric signal into an optical signal, and output the optical signal as a second optical signal.
    Type: Application
    Filed: February 1, 2022
    Publication date: May 19, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kiyoshi ONOHARA, Tsuyoshi YOSHIDA, Naoki SUZUKI
  • Patent number: 11248902
    Abstract: An optical distance measurement device includes: a photodetector including PDs for receiving interference light output from an optical interference unit and outputting detection signals of the interference light; and a switch for selecting one of the detection signals output from the PDs, in which a distance calculation unit calculates a distance to a measurement object on the basis of the detection signal selected by the switch.
    Type: Grant
    Filed: November 4, 2020
    Date of Patent: February 15, 2022
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroki Goto, Yoshihiro Matsumoto, Kiyoshi Onohara, Naoki Suzuki, Takayuki Yanagisawa
  • Publication number: 20210396880
    Abstract: An optical distance measurer includes: a beam splitter splitting a laser beam and outputting as measurement light and reference light; a measurement light beam splitter splitting the measurement light and outputting as first measurement light and second measurement light; a reference light beam splitter splitting the reference light and outputting as first reference light and second reference light; a first optical system having a first Rayleigh length, the first optical system emitting the first measurement light to a target object; and a second optical system having a second Rayleigh length different from the first Rayleigh length, the second optical system emitting the second measurement light to the target object; a first receiver receiving the first reference light and first reflection light that is the first measurement light reflected by the target object and outputting a first receiving signal indicating the first reference light and the first reflection light; and a second receiver receiving the seco
    Type: Application
    Filed: September 1, 2021
    Publication date: December 23, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takanori YAMAUCHI, Hiroki GOTO, Tsuyoshi YOSHIDA, Kiyoshi ONOHARA, Naoki SUZUKI
  • Publication number: 20210359697
    Abstract: Provided is a receiver device including a first A/D converter (203), a second A/D converter (204), an amplifier (205) which is provided at a previous stage of the second A/D converter (204), and a digital signal processing unit (207). The digital signal processing unit (207) includes an amplitude comparison unit (211) configured to compare an amplitude of a digital signal output from the first A/D converter (203) and an amplitude of a digital signal output from the second A/D converter (204) to make a determination, and to output a determination result, and a selector (212) configured to select one of the digital signal output from the first A/D converter (203) or the digital signal output from the second A/D converter (204) based on the determination result.
    Type: Application
    Filed: July 28, 2021
    Publication date: November 18, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventor: Kiyoshi Onohara
  • Patent number: 11088776
    Abstract: Provided is an optical transmission/reception device (1) for transmitting or receiving an optical signal via a communication path (2) in which a phase change of the optical signal is suppressed. The optical transmission/reception device (1) includes: a transmission device (10) including a framer generation unit (11), a symbol mapping unit (12), and an optical modulation unit (13); and a reception device (20) including an optical reception front end unit (21), an A/D conversion unit (22), a polarization separation unit (23), and a phase estimating unit (24) for estimating a phase of at least one of a plurality of polarizations from a plurality of polarization signals separated by the polarization separation unit (23) and estimating a phase of a remaining polarization on the basis of the estimated phase.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: August 10, 2021
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kiyoshi Onohara, Keisuke Matsuda
  • Publication number: 20210199424
    Abstract: A machine tool includes a machining unit for feeding cutting oil to a work surface of a workpiece and machining the work surface, an optical sensor body unit dividing light outputted from a frequency sweep light source for outputting light whose frequency varies periodically into irradiation light with which the workpiece is to be irradiated and reference light, irradiating the workpiece with the irradiation light, detecting a peak frequency of interference light between reflected light which is irradiation light reflected by the workpiece, and the reference light, and measuring the distance from the machine tool to the work surface on the basis of the peak frequency, and a shape calculation unit calculating the shape of the workpiece on the basis of the distance measured by the optical sensor body unit.
    Type: Application
    Filed: March 11, 2021
    Publication date: July 1, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroki GOTO, Kiyoshi ONOHARA, Masaharu IMAKI, Naoki SUZUKI, Takayuki YANAGISAWA
  • Publication number: 20210135776
    Abstract: Provided is an optical transmission/reception device (1) for transmitting or receiving an optical signal via a communication path (2) in which a phase change of the optical signal is suppressed. The optical transmission/reception device (1) includes: a transmission device (10) including a framer generation unit (11), a symbol mapping unit (12), and an optical modulation unit (13); and a reception device (20) including an optical reception front end unit (21), an A/D conversion unit (22), a polarization separation unit (23), and a phase estimating unit (24) for estimating a phase of at least one of a plurality of polarizations from a plurality of polarization signals separated by the polarization separation unit (23) and estimating a phase of a remaining polarization on the basis of the estimated phase.
    Type: Application
    Filed: August 31, 2017
    Publication date: May 6, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kiyoshi ONOHARA, Keisuke MATSUDA
  • Publication number: 20210048287
    Abstract: An optical distance measurement device includes: a photodetector including PDs for receiving interference light output from an optical interference unit and outputting detection signals of the interference light; and a switch for selecting one of the detection signals output from the PDs, in which a distance calculation unit calculates a distance to a measurement object on the basis of the detection signal selected by the switch.
    Type: Application
    Filed: November 4, 2020
    Publication date: February 18, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroki GOTO, Yoshihiro MATSUMOTO, Kiyoshi ONOHARA, Naoki SUZUKI, Takayuki YANAGISAWA
  • Publication number: 20210011157
    Abstract: The optical distance measurement device is configured to include an optical interference unit for separating the reflected light into a reflected light of a first polarized wave and a reflected light of a second polarized wave, extracting first and second components orthogonal to each other from an interference light of the reflected light of the first polarized wave and the reference light, and extracting third and fourth components orthogonal to each other from an interference light of the reflected light of the second polarized wave and the reference light, and a polarization rotation unit for acquiring one or more components of horizontal and vertical components of a polarized wave by rotating a polarization angle of a first complex signal having the first and second components and a polarization angle of a second complex signal having the third and fourth components, so that a distance calculation unit calculates, on the basis of the components acquired by the polarization rotation unit, a difference bet
    Type: Application
    Filed: September 30, 2020
    Publication date: January 14, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kiyoshi ONOHARA, Hiroki GOTO
  • Publication number: 20210010802
    Abstract: The optical distance measurement device is configured in such a manner that the frequency-swept light output unit outputs frequency-swept light during a time period from when frequency sweeping of frequency-swept light being output is completed to when the next frequency sweeping becomes possible, the frequency-swept light output during the time period being frequency swept at a different frequency from the frequency-swept light being output.
    Type: Application
    Filed: September 30, 2020
    Publication date: January 14, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Kiyoshi ONOHARA, Hiroki GOTO, Naoki SUZUKI
  • Patent number: 10128940
    Abstract: An optical transmission method wavelength-multiplexing and transmitting multiple channels including data. The data are composed of data areas independent between the channels and data areas non-independent between the channels. Data patterns of the data areas non-independent between the channels are variable. The data patterns of the data areas non-independent between the channels are set so that in time periods of the non-independent data areas on an optical transmission section, a time period during which polarization states of the multiple channels are correlated in the optical transmission section has a length such that an error rate is less than or equal to a threshold value, the error rate being determined from a temporal distribution of bit errors obtained from a result of error decision after demodulation in an optical receiver.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: November 13, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Goto, Tsuyoshi Yoshida, Kiyoshi Onohara, Takashi Sugihara, Kazuo Kubo, Tatsuya Kobayashi, Keisuke Matsuda, Masashi Binkai
  • Patent number: 9590800
    Abstract: A multilevel modulation optical transceiver for distributing an OTN frame defined by ITU-T to a plurality of lanes for transmission, the multilevel modulation optical transceiver including: an MLD transmission unit; and a data replication unit, further including a data rearrangement unit arranged at a preceding stage of the MLD transmission unit, for performing data rearrangement processing of replicating, in advance, a frame synchronization pattern of an overhead of the OTN frame before being subjected to the lane rotation processing from a first lane that has the overhead to another lane that does not have the overhead, and of saving a payload to be overwritten with the frame synchronization pattern to a reserved area of the overhead to enable the payload to be restored on a reception side.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: March 7, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Kiyoshi Onohara, Tsuyoshi Yoshida, Takafumi Fujimori, Yoshiaki Konishi
  • Publication number: 20170041067
    Abstract: An optical transmission method wavelength-multiplexes and transmits multiple channels. Data transmitted on the wavelength-multiplexed channels are composed of data areas independent between the channels and data areas non-independent between the channels. Data patterns of the data areas non-independent between the channels are variable. This reduces the time period during which polarization states of the multiple channels are correlated, thereby reducing non-linear optical effects occurring between the channels and reducing deterioration in signal quality at a receiving end.
    Type: Application
    Filed: April 16, 2015
    Publication date: February 9, 2017
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hiroki GOTO, Tsuyoshi YOSHIDA, Kiyoshi ONOHARA, Takashi SUGIHARA, Kazuo KUBO, Tatsuya KOBAYASHI, Keisuke MATSUDA, Masashi BINKAI
  • Publication number: 20160087786
    Abstract: A multilevel modulation optical transceiver for distributing an OTN frame defined by ITU-T to a plurality of lanes for transmission, the multilevel modulation optical transceiver including: an MLD transmission unit; and a data replication unit, further including a data rearrangement unit arranged at a preceding stage of the MLD transmission unit, for performing data rearrangement processing of replicating, in advance, a frame synchronization pattern of an overhead of the OTN frame before being subjected to the lane rotation processing from a first lane that has the overhead to another lane that does not have the overhead, and of saving a payload to be overwritten with the frame synchronization pattern to a reserved area of the overhead to enable the payload to be restored on a reception side.
    Type: Application
    Filed: March 26, 2013
    Publication date: March 24, 2016
    Inventor: Kiyoshi ONOHARA
  • Publication number: 20160006538
    Abstract: An optical transmission apparatus includes: an optical transmitter; and an optical receiver. The optical transmitter has a plurality of modulation rules, switches the plurality of modulation rules to generate optical signals, multiplexes the optical signals with orthogonal polarizations, randomizes phases of the optical signals, and transmits the optical signals. The optical receiver includes: a coherent detector for causing interference between received optical signals and local oscillation light to convert the optical signals into electrical signals; a polarization splitter and adaptive equalizer for subjecting the electrical signals to polarization splitting and adaptive equalization; and decoders for performing decoding or differential detection on the electrical signals on which polarization splitting and adaptive equalization have been performed.
    Type: Application
    Filed: November 14, 2013
    Publication date: January 7, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tsuyoshi YOSHIDA, Takashi SUGIHARA, Takafumi FUJIMORI, Kiyoshi ONOHARA
  • Patent number: 9081677
    Abstract: An input bit error ratio estimating method executed by a communication control unit includes a computing, a condition determining, a first input BER estimating, a second input BER estimating, a third input BER estimating, and an input BER estimation result outputting. In the condition determining, the communication control unit determines which of a plurality of conditions set in advance to be narrowed down to one has been established, based on a post-internal decoding residual error detection ratio. Based on the condition that is determined in the condition determining as one that has been established, the communication control unit selects one out of a plurality of processing procedures for estimating the input BER, namely, selects one of the first input BER estimating to the third input BER estimating and executes the selected processing.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: July 14, 2015
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yoshikuni Miyata, Kenya Sugihara, Kiyoshi Onohara, Kazuo Kubo, Hideo Yoshida, Takashi Mizuochi
  • Patent number: 8768181
    Abstract: A differential code optical transmission and reception device including: a digital signal processing optical transceiver that converts information data into an optical signal and transmits it to a communication channel, a reception front end part that receives the optical signal from the communication channel, an O/E conversion part that converts the optical signal received from the communication channel into an electrical signal, a skew correction part that regulates or correct a skew between lanes contained in the electrical signal, a differential decoder that decodes a differential code of the skew corrected electrical signal, and a lane exchange/rotation part that rearranges the electrical signal having passed through the differential decoder into a lane state thereof at the time of transmission in cases where lane exchange has occurred in the communication channel.
    Type: Grant
    Filed: October 6, 2010
    Date of Patent: July 1, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kiyoshi Onohara, Hideo Yoshida, Takashi Sugihara
  • Publication number: 20130311840
    Abstract: An input bit error ratio estimating method executed by a communication control unit includes a computing, a condition determining, a first input BER estimating, a second input BER estimating, a third input BER estimating, and an input BER estimation result outputting. In the condition determining, the communication control unit determines which of a plurality of conditions set in advance to be narrowed down to one has been established, based on a post-internal decoding residual error detection ratio. Based on the condition that is determined in the condition determining as one that has been established, the communication control unit selects one out of a plurality of processing procedures for estimating the input BER, namely, selects one of the first input BER estimating to the third input BER estimating and executes the selected processing.
    Type: Application
    Filed: February 20, 2012
    Publication date: November 21, 2013
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yoshikuni Miyata, Kenya Sugihara, Kiyoshi Onohara, Kazuo Kubo, Hideo Yoshida, Takashi Mizuochi