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).
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Patent number: 12100573Abstract: 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: GrantFiled: March 11, 2022Date of Patent: September 24, 2024Assignee: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventors: Toshimi Watanabe, Hirobumi Yoshizawa, Junki Sone
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Publication number: 20230337348Abstract: 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: ApplicationFiled: June 20, 2023Publication date: October 19, 2023Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventors: Toshimi WATANABE, Junki SONE
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Publication number: 20220199348Abstract: 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: ApplicationFiled: March 11, 2022Publication date: June 23, 2022Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventors: Toshimi WATANABE, Hirobumi YOSHIZAWA, Junki SONE
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Patent number: 11152182Abstract: 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: GrantFiled: July 27, 2020Date of Patent: October 19, 2021Assignee: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventor: Toshimi Watanabe
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Publication number: 20210233733Abstract: 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: ApplicationFiled: July 27, 2020Publication date: July 29, 2021Applicant: CANON ELECTRON TUBES & DEVICES CO., LTD.Inventor: Toshimi WATANABE
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Publication number: 20110211977Abstract: 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: ApplicationFiled: October 29, 2009Publication date: September 1, 2011Inventors: Tatsuki Nomura, Yuuji Oiwake, Toshimi Watanabe, Sadaaki Kajimoto, Toshiaki Kazama, Ippei Goto
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Publication number: 20110209448Abstract: 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: ApplicationFiled: October 29, 2009Publication date: September 1, 2011Inventors: Toshimi Watanabe, Tatsuki Nomura, Jiro Iisuka
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Patent number: 7965334Abstract: 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: GrantFiled: June 25, 2007Date of Patent: June 21, 2011Assignee: Nikon CorporationInventors: Toshimi Watanabe, Toshiaki Maeda, Tadashi Ohta
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Patent number: 7660519Abstract: 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: GrantFiled: August 28, 2006Date of Patent: February 9, 2010Assignee: Nikon CorporationInventors: Yukikazu Iwane, Shigeo Takahashi, Toshimi Watanabe, Toshiaki Maeda
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Patent number: 7505075Abstract: 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: GrantFiled: February 13, 2004Date of Patent: March 17, 2009Assignee: Nikon CorporationInventor: Toshimi Watanabe
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Patent number: 7382411Abstract: 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; andType: GrantFiled: August 12, 2003Date of Patent: June 3, 2008Assignee: Nikon CorporationInventor: Toshimi Watanabe
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Publication number: 20070247542Abstract: 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: ApplicationFiled: June 25, 2007Publication date: October 25, 2007Applicant: NIKON CORPORATIONInventors: Toshimi Watanabe, Toshiaki Maeda, Tadashi Ohta
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Patent number: 7262804Abstract: 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: GrantFiled: February 11, 2004Date of Patent: August 28, 2007Assignee: Nikon CorporationInventor: Toshimi Watanabe
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Publication number: 20070047941Abstract: 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: ApplicationFiled: August 28, 2006Publication date: March 1, 2007Applicant: NIKON CORPORATIONInventors: Yukikazu Iwane, Shigeo Takahashi, Toshimi Watanabe, Toshiaki Maeda
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Patent number: 7184090Abstract: 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: GrantFiled: September 26, 2002Date of Patent: February 27, 2007Assignee: Nikon CorporationInventors: Toshimi Watanabe, Toshiaki Maeda, Hideo Hibino, Tadashi Ohta
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Patent number: 7158182Abstract: 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: GrantFiled: September 26, 2002Date of Patent: January 2, 2007Assignee: Nikon CorporationInventors: Toshimi Watanabe, Toshiaki Maeda, Hideo Hibino, Tadashi Ohta
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Publication number: 20040233320Abstract: 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: ApplicationFiled: February 11, 2004Publication date: November 25, 2004Applicant: NIKON CORPORATIONInventor: Toshimi Watanabe
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Publication number: 20040227843Abstract: 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: ApplicationFiled: February 13, 2004Publication date: November 18, 2004Applicant: NIKON CORPORATIONInventor: Toshimi Watanabe
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Publication number: 20040212721Abstract: 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; andType: ApplicationFiled: August 12, 2003Publication date: October 28, 2004Applicant: NIKON CORPORATIONInventor: Toshimi Watanabe
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Patent number: 6721499Abstract: 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: GrantFiled: March 21, 2003Date of Patent: April 13, 2004Assignees: Nikon Corporation, Nikon Technologies, Inc.Inventors: Toshimi Watanabe, Toshiaki Maeda, Hideo Hibino, Tadashi Ohta