Patents by Inventor Toshimi Watanabe

Toshimi Watanabe 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: 12100573
    Abstract: According to one embodiment, an X-ray tube device includes a cathode which emits electrons, an anode target which generates X-rays when the electrons emitted from the cathode collide therewith, a first tube portion, a second tube portion which forms a flow path of a coolant together with the first tube portion, and a protective film. The protective film covers an inner surface of the first tube portion, and is formed of hard gold.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: September 24, 2024
    Assignee: CANON ELECTRON TUBES & DEVICES CO., LTD.
    Inventors: Toshimi Watanabe, Hirobumi Yoshizawa, Junki Sone
  • Publication number: 20230337348
    Abstract: According to one embodiment, an X-ray tube includes a vacuum enclosure in which an output window which transmits X-rays is formed, an anode target provided in the vacuum enclosure so as to oppose the output window, a cathode filament provided in the vacuum enclosure, that emits electrons to be irradiated onto the anode target, a power feed section to which a high voltage cable is connected, and an insulating portion that covers the power feed section and the high-voltage cable with an insulating material, and the power feed section includes a contact surface with which a distal end surface of the high-voltage cable is brought into contact, and an angle formed by the contact surface and the side surface of the high-voltage cable is an acute angle.
    Type: Application
    Filed: June 20, 2023
    Publication date: October 19, 2023
    Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.
    Inventors: Toshimi WATANABE, Junki SONE
  • Publication number: 20220199348
    Abstract: According to one embodiment, an X-ray tube device includes a cathode which emits electrons, an anode target which generates X-rays when the electrons emitted from the cathode collide therewith, a first tube portion, a second tube portion which forms a flow path of a coolant together with the first tube portion, and a protective film. The protective film covers an inner surface of the first tube portion, and is formed of hard gold.
    Type: Application
    Filed: March 11, 2022
    Publication date: June 23, 2022
    Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.
    Inventors: Toshimi WATANABE, Hirobumi YOSHIZAWA, Junki SONE
  • Patent number: 11152182
    Abstract: According to one embodiment, an X-ray tube assembly includes a cathode emitting electrons, an anode target generating X-rays when the electrodes emitted from the cathode collide with the anode target, an anode block, a coolant pipe, and a protective film. The anode block includes a tube portion, and a bottom portion closing one end side of the tube portion and joined to the anode target. The coolant pipe is located on an inner side of the tube portion, includes an outlet from which a coolant is discharged toward the bottom portion, and forms a flow passage of the coolant between the coolant pipe and the anode block. The protective film covers an inner surface of the bottom portion and is formed of hard gold containing nickel.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: October 19, 2021
    Assignee: CANON ELECTRON TUBES & DEVICES CO., LTD.
    Inventor: Toshimi Watanabe
  • Publication number: 20210233733
    Abstract: According to one embodiment, an X-ray tube assembly includes a cathode emitting electrons, an anode target generating X-rays when the electrodes emitted from the cathode collide with the anode target, an anode block, a coolant pipe, and a protective film. The anode block includes a tube portion, and a bottom portion closing one end side of the tube portion and joined to the anode target. The coolant pipe is located on an inner side of the tube portion, includes an outlet from which a coolant is discharged toward the bottom portion, and forms a flow passage of the coolant between the coolant pipe and the anode block. The protective film covers an inner surface of the bottom portion and is formed of hard gold containing nickel.
    Type: Application
    Filed: July 27, 2020
    Publication date: July 29, 2021
    Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.
    Inventor: Toshimi WATANABE
  • Publication number: 20110211977
    Abstract: Provided is an oil separator built-in compressor, which prevents a drop in the separating ability of an oil separator while reducing a pressure loss in a communication hole formed between a discharge chamber and an oil separation chamber and which also considers the working feasibility of a casing. The oil separator built-in compressor comprises: a separation chamber arranged adjacent to the discharge chamber and formed entirely thereof into a space in order to separate an oil-containing gas being introduced, centrifugally into gas and oil so that the separated oil flows downward whereas the separated gas is released upward; and the communication hole formed between the discharge chamber and the separation chamber in order to introduce the oil-containing gas from the discharge chamber into the separation chamber.
    Type: Application
    Filed: October 29, 2009
    Publication date: September 1, 2011
    Inventors: Tatsuki Nomura, Yuuji Oiwake, Toshimi Watanabe, Sadaaki Kajimoto, Toshiaki Kazama, Ippei Goto
  • Publication number: 20110209448
    Abstract: Disclosed is an oil separator built-in scroll-type compressor which is compact and lightweight but still maintains the required strength, and which exhibits an excellent oil separating performance. The oil separator built-in scroll-type compressor includes a separation chamber which is disposed adjacent to a discharge chamber, and which separates an oil-containing gas introduced thereinto into gas and oil by centrifugal separation, and from which the separated oil is dropped downward and the gas is extracted upward; and a communication hole between the discharge chamber and the separation chamber through which the oil-containing gas is introduced from the discharge chamber into the separation chamber.
    Type: Application
    Filed: October 29, 2009
    Publication date: September 1, 2011
    Inventors: Toshimi Watanabe, Tatsuki Nomura, Jiro Iisuka
  • Patent number: 7965334
    Abstract: An auto-focus (AF) camera enables AF operation with high speed and enhanced accuracy. The AF operation encompasses step-scanning the focus lens of the camera from the closest focal position to infinity, or vice versa. In one embodiment, the steps in the step-scanning are made smaller around a position judged to be close to the focus position, and the steps are made larger at other positions.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: June 21, 2011
    Assignee: Nikon Corporation
    Inventors: Toshimi Watanabe, Toshiaki Maeda, Tadashi Ohta
  • Patent number: 7660519
    Abstract: An autofocus apparatus includes an imaging device that captures a subject image through a photographic lens; an AF area determining device that determines a range of image signals to be used for autofocus adjustment based upon image signals provided by the imaging device; a focus adjustment device that adjusts a focal point position achieved through the photographic lens by driving a focus lens so as to maximize contrast achieved with the image signals in the determined range; and a control device that controls the focus adjustment device, if the range of the image signals determined by the AF area determining device has been altered, so as to adjust the focal point position by using image signals in the altered range.
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: February 9, 2010
    Assignee: Nikon Corporation
    Inventors: Yukikazu Iwane, Shigeo Takahashi, Toshimi Watanabe, Toshiaki Maeda
  • Patent number: 7505075
    Abstract: A CPU calculates integrating values of image-capturing signals in band 1 obtained by removing a frequency component equal to or lower than a first cutoff frequency from an image-capturing signal output from an image-capturing element through a band pass filter and integrating values of an image-capturing signal in band 2 obtained by removing a frequency component equal to or lower than a second cutoff frequency through a band pass filter, each in correspondence to one of a plurality of lens positions. The CPU then calculates focal point evaluation values by using these integrating values in correspondence to the individual bands. In addition, when the largest evaluation value in band 1 is judged to correspond to the closeup end position of the lens, the CPU makes a decision as to whether or not a focus match is achieved at the closeup end.
    Type: Grant
    Filed: February 13, 2004
    Date of Patent: March 17, 2009
    Assignee: Nikon Corporation
    Inventor: Toshimi Watanabe
  • Patent number: 7382411
    Abstract: A method for focus adjusting through which a subject image formed with a photographic optical system is captured by an image-capturing device and a focus match position for the photographic optical system is calculated based upon focus evaluation values calculated by using image-capturing signals includes steps for: obtaining focus evaluation values over first sampling increments in a focus adjustment range of the photographic optical system; making a decision as to whether or not a sampling position corresponding to a largest value among the focus evaluation values obtained over the first sampling increments is substantially at an end point of the focus adjustment range; obtaining focus adjustment values over second sampling increments smaller than the first sampling increments in a range that contains the end point and is smaller than the focus adjustment range if the sampling position corresponding to the largest value among the focus evaluation values is at the end point of the focus adjustment range; and
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: June 3, 2008
    Assignee: Nikon Corporation
    Inventor: Toshimi Watanabe
  • Publication number: 20070247542
    Abstract: An auto-focus (AF) camera enables AF operation with high speed and enhanced accuracy. The AF operation encompasses step-scanning the focus lens of the camera from the closest focal position to infinity, or vice versa. In one embodiment, the steps in the step-scanning are made smaller around a position judged to be close to the focus position, and the steps are made larger at other positions.
    Type: Application
    Filed: June 25, 2007
    Publication date: October 25, 2007
    Applicant: NIKON CORPORATION
    Inventors: Toshimi Watanabe, Toshiaki Maeda, Tadashi Ohta
  • Patent number: 7262804
    Abstract: A CPU calculates integrating values of image-capturing signals in a band 1 obtained by removing through a band pass filter a low frequency component of image-capturing signal output from an image-capturing device and integrating values of the image-capturing signals in a band 3 retaining the low frequency component intact, each calculated in correspondence to one of a plurality of lens positions. The CPU then obtains focal point evaluation values based upon these integrating values in correspondence to the individual bands. In addition, when it is judged that the image-capturing signals are saturated, the CPU calculates a new evaluation value parameter 1 history record=(focal point evaluation value history record in band 3?focal point evaluation value history record in band 1). The CPU then determines a new evaluation value parameter 1 history record extremal value through a 3-point interpolation operation and calculates a lens position corresponding to the extremal value.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: August 28, 2007
    Assignee: Nikon Corporation
    Inventor: Toshimi Watanabe
  • Publication number: 20070047941
    Abstract: An autofocus apparatus includes an imaging device that captures a subject image through a photographic lens; an AF area determining device that determines a range of image signals to be used for autofocus adjustment based upon image signals provided by the imaging device; a focus adjustment device that adjusts a focal point position achieved through the photographic lens by driving a focus lens so as to maximize contrast achieved with the image signals in the determined range; and a control device that controls the focus adjustment device, if the range of the image signals determined by the AF area determining device has been altered, so as to adjust the focal point position by using image signals in the altered range.
    Type: Application
    Filed: August 28, 2006
    Publication date: March 1, 2007
    Applicant: NIKON CORPORATION
    Inventors: Yukikazu Iwane, Shigeo Takahashi, Toshimi Watanabe, Toshiaki Maeda
  • Patent number: 7184090
    Abstract: A camera includes: an image-capturing element that captures a subject image through a photographic lens; an evaluation value calculation unit that calculates a focus evaluation value based upon an image-capturing signal output from the image-capturing element; a focusing operation unit that performs a focusing operation at the photographic lens based upon the focus evaluation value; a decision-making unit that makes a decision as to whether or not a predetermined length of time has elapsed following an end of the focusing operation; a restart unit that engages the focusing operation unit in a focusing operation if the decision-making unit decides that the predetermined length of time has elapsed; and a time adjustment unit that changes the predetermined length of time.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: February 27, 2007
    Assignee: Nikon Corporation
    Inventors: Toshimi Watanabe, Toshiaki Maeda, Hideo Hibino, Tadashi Ohta
  • Patent number: 7158182
    Abstract: A camera includes: an image-capturing element that captures a subject image through a photographic lens having a focusing lens; an evaluation value calculation unit that calculates focus evaluation values at a plurality of lens positions assumed by the focusing lens based upon an image-capturing signal output by the image-capturing element; a weighting unit that weights the focus evaluation values calculated by the evaluation value calculation unit in correspondence to the lens positions of the focusing lens assumed when the focus evaluation values are calculated respectively; and a focusing operation unit that performs a focusing operation for the photographic lens based upon the weighted focus evaluation values.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: January 2, 2007
    Assignee: Nikon Corporation
    Inventors: Toshimi Watanabe, Toshiaki Maeda, Hideo Hibino, Tadashi Ohta
  • Publication number: 20040233320
    Abstract: A CPU calculates integrating values of image-capturing signals in a band 1 obtained by removing through a band pass filter a low frequency component of image-capturing signal output from an image-capturing device and integrating values of the image-capturing signals in a band 3 retaining the low frequency component intact, each calculated in correspondence to one of a plurality of lens positions. The CPU then obtains focal point evaluation values based upon these integrating values in correspondence to the individual bands. In addition, when it is judged that the image-capturing signals are saturated, the CPU calculates a new evaluation value parameter 1 history record=(focal point evaluation value history record in band 3−focal point evaluation value history record in band 1). The CPU then determines a new evaluation value parameter 1 history record extremal value through a 3-point interpolation operation and calculates a lens position corresponding to the extremal value.
    Type: Application
    Filed: February 11, 2004
    Publication date: November 25, 2004
    Applicant: NIKON CORPORATION
    Inventor: Toshimi Watanabe
  • Publication number: 20040227843
    Abstract: A CPU calculates integrating values of image-capturing signals in band 1 obtained by removing a frequency component equal to or lower than a first cutoff frequency from an image-capturing signal output from an image-capturing element through a band pass filter and integrating values of an image-capturing signal in band 2 obtained by removing a frequency component equal to or lower than a second cutoff frequency through a band pass filter, each in correspondence to one of a plurality of lens positions. The CPU then calculates focal point evaluation values by using these integrating values in correspondence to the individual bands. In addition, when the largest evaluation value in band 1 is judged to correspond to the closeup end position of the lens, the CPU makes a decision as to whether or not a focus match is achieved at the closeup end.
    Type: Application
    Filed: February 13, 2004
    Publication date: November 18, 2004
    Applicant: NIKON CORPORATION
    Inventor: Toshimi Watanabe
  • Publication number: 20040212721
    Abstract: A method for focus adjusting through which a subject image formed with a photographic optical system is captured by an image-capturing device and a focus match position for the photographic optical system is calculated based upon focus evaluation values calculated by using image-capturing signals includes steps for: obtaining focus evaluation values over first sampling increments in a focus adjustment range of the photographic optical system; making a decision as to whether or not a sampling position corresponding to a largest value among the focus evaluation values obtained over the first sampling increments is substantially at an end point of the focus adjustment range; obtaining focus adjustment values over second sampling increments smaller than the first sampling increments in a range that contains the end point and is smaller than the focus adjustment range if the sampling position corresponding to the largest value among the focus evaluation values is at the end point of the focus adjustment range; and
    Type: Application
    Filed: August 12, 2003
    Publication date: October 28, 2004
    Applicant: NIKON CORPORATION
    Inventor: Toshimi Watanabe
  • Patent number: 6721499
    Abstract: A camera includes an imaging element that picks up an image of an object through a taking-lens, an evaluation value calculator that calculates focus evaluation value based upon a picked-up imaging signal, a selector that selects one focusing mode from a plurality of focusing modes, a focusing device that performs a focusing operation based upon the focus evaluation value and the selected focusing mode and a rebooting device that reboots the focusing operation after the focusing operation finishes, wherein further includes an evaluation value memory device that stores a plurality of focus evaluation values calculated by the evaluation value calculator in time sequence after the focusing operation finishes and a fluctuation evaluator that evaluates fluctuation in focus evaluation value stored into the evaluation value memory device, wherein, when the rebooting device reboots the focusing operation, the selector selects one focusing mode from a plurality of focusing modes.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: April 13, 2004
    Assignees: Nikon Corporation, Nikon Technologies, Inc.
    Inventors: Toshimi Watanabe, Toshiaki Maeda, Hideo Hibino, Tadashi Ohta