Patents by Inventor Hitoshi Kishita
Hitoshi Kishita 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: 8188656Abstract: A photomultiplier tube including a casing having a glass substrate with a main surface made with an insulating material, dynodes having a 1st stage to an Nth stage which are arrayed to be spaced away sequentially from a first end side to a second end side on the main surface, a photocathode installed on the first end side to be spaced away from the 1st stage dynode to emit photoelectrons, and an anode part installed on the second end side to be spaced away from the Nth stage dynode, wherein a groove is formed between two adjacent dynodes on the main surface of the glass substrate, and the 1st stage to the Nth stage dynodes are fixed on raised parts adjacent to the grooves.Type: GrantFiled: February 23, 2010Date of Patent: May 29, 2012Assignee: Hamamatsu Photonics K.K.Inventors: Hiroyuki Sugiyama, Hideki Shimoi, Tsuyoshi Kodama, Hitoshi Kishita, Yasuyuki Kohno, Keisuke Inoue
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Patent number: 8115386Abstract: Electrons are prevented from being made incident onto an insulation part of a casing between dynodes to improve a withstand voltage.Type: GrantFiled: February 22, 2010Date of Patent: February 14, 2012Assignee: Hamamatsu Photonics K.K.Inventors: Hideki Shimoi, Hitoshi Kishita, Tsuyoshi Kodama, Hiroyuki Kyushima
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Patent number: 7928657Abstract: The present invention relates to a photomultiplier having a fine configuration capable of realizing stable detection accuracy. The photomultiplier has a housing whose inside is maintained vacuum, and a photocathode, an electron-multiplier section, and an anode are disposed in the housing. In particular, one or more control electrodes disposed in an internal space of the housing which surrounds the electron-multiplier section and the anode are electrically connected via one or more connection parts extending from an electron emission terminal of the electron-multiplier section.Type: GrantFiled: June 1, 2006Date of Patent: April 19, 2011Assignee: Hamamatsu Photonics K.K.Inventors: Hiroyuki Kyushima, Hideki Shimoi, Hiroyuki Sugiyama, Hitoshi Kishita, Suenori Kimura, Yuji Masuda, Takayuki Ohmura
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Patent number: 7919921Abstract: The present invention relates to a photomultiplier having a fine structure capable of realizing high multiplication efficiency. The photomultiplier comprises a housing whose inside is maintained vacuum, and, on a device mounting surface which is a part of an inner wall surface defining an internal space of the housing, a photocathode serving as a reflection type photocathode, an electron-multiplier section, an anode, and a voltage distributing section are disposed integrally. In particular, the electron-multiplier section is constituted by dynodes at multiple stages cascade-multiplying photoelectrons from the photocathode, and the voltage distributing section, which applies corresponding voltages to the dynodes at the respective stages respectively, is on the same surface together with the electron-multiplier section.Type: GrantFiled: June 1, 2006Date of Patent: April 5, 2011Assignee: Hamamatsu Photonics K.K.Inventors: Hiroyuki Kyushima, Hideki Shimoi, Hiroyuki Sugiyama, Hitoshi Kishita, Suenori Kimura, Yuji Masuda, Takayuki Ohmura
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Patent number: 7880385Abstract: The present invention relates to a photomultiplier having a fine structure capable of realizing high detection accuracy by effectively suppressing cross talk among electron-multiplier channels. The photomultiplier comprises a housing whose inside is maintained vacuum, and, in the housing, a photocathode, an electron-multiplier section, and anodes are disposed. The electron-multiplier section has groove portions for cascade-multiplying photoelectrons as electron-multiplier channels, and the anodes are constituted by channel electrodes corresponding to the groove portions respectively defined by wall parts. In particular, at least parts of the respective channel electrodes are located in spaces sandwiched between pairs of wall parts defining the corresponding groove portions.Type: GrantFiled: June 1, 2006Date of Patent: February 1, 2011Assignee: Hamamatsu Photonics K.K.Inventors: Hiroyuki Kyushima, Hideki Shimoi, Hiroyuki Sugiyama, Hitoshi Kishita, Suenori Kimura, Yuji Masuda, Takayuki Ohmura
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Patent number: 7867807Abstract: The present invention relates to a manufacturing method of obtaining a photoelectric converting device which can sufficiently maintain airtightness of a housing space for photocathode without degradation of the characteristics of the photocathode. In accordance with the manufacturing method, on the side wall end face of a lower frame and a bonding portion of an upper frame forming an envelope of the photoelectric converting device, a multilayered metal film of chromium and nickel is formed. In a vacuum space decompressed to a predetermined degree of vacuum and having a temperature not more than the melting point of indium, these upper and lower frames introduced therein are brought into close contact with each other with a predetermined pressure while sandwiching indium wire members, and accordingly, an envelope having a housing space whose airtightness is sufficiently maintained is obtained.Type: GrantFiled: February 28, 2007Date of Patent: January 11, 2011Assignee: Hamamatsu Photonics K.K.Inventors: Hitoshi Kishita, Hiroyuki Sugiyama, Hiroyuki Kyushima, Hideki Shimoi, Keisuke Inoue
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Publication number: 20100213837Abstract: Electrons are prevented from being made incident onto an insulation part of a casing between dynodes to improve a withstand voltage.Type: ApplicationFiled: February 22, 2010Publication date: August 26, 2010Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Hideki SHIMOI, Hitoshi Kishita, Tsuyoshi Kodama, Hiroyuki Kyushima
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Publication number: 20100213838Abstract: Electrons are prevented from being made incident onto an insulation part between dynodes to improve a withstand voltage.Type: ApplicationFiled: February 23, 2010Publication date: August 26, 2010Applicant: HAMAMATSU PHOTONICS K.K.Inventors: Hiroyuki SUGIYAMA, Hideki Shimoi, Tsuyoshi Kodama, Hitoshi Kishita, Yasuyuki Kohno, Keisuke Inoue
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Patent number: 7741759Abstract: A photomultiplier tube 1 is an electron tube comprising an envelope 5 including a frame 3b having at least one end part formed with an opening and an upper substrate 2 airtightly joined to the opening, and a photocathode 6 contained within the envelope 5, the photocathode 6 emitting a photoelectron into the envelope 5 in response to light incident thereon from the outside; wherein multilayer metal films 10b, 10a each constituted by a metal film made of titanium, a metal film made of platinum, and a metal film made of gold laminated in this order are formed at the opening and the joint part between the upper substrate 2 and opening; and wherein the frame 3b and upper side substrate 2 are joined to each other by holding a joint layer 14 containing indium between the respective multilayer metal films 10b, 10a.Type: GrantFiled: June 28, 2006Date of Patent: June 22, 2010Assignee: Hamamatsu Photonics K.K.Inventors: Hiroyuki Sugiyama, Keisuke Inoue, Hitoshi Kishita, Hideki Shimoi, Hiroyuki Kyushima
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Publication number: 20090305450Abstract: The present invention relates to a manufacturing method of obtaining a photoelectric converting device which can sufficiently maintain airtightness of a housing space for photocathode without degradation of the characteristics of the photocathode. In accordance with the manufacturing method, on the side wall end face of a lower frame and a bonding portion of an upper frame forming an envelope of the photoelectric converting device, a multilayered metal film of chromium and nickel is formed. In a vacuum space decompressed to a predetermined degree of vacuum and having a temperature not more than the melting point of indium, these upper and lower frames introduced therein are brought into close contact with each other with a predetermined pressure while sandwiching indium wire members, and accordingly, an envelope having a housing space whose airtightness is sufficiently maintained is obtained.Type: ApplicationFiled: February 28, 2007Publication date: December 10, 2009Applicant: Hammamatsu Photonics K.K.Inventors: Hitoshi Kishita, Hiroyuki Sugiyama, Hiroyuki Kyushima, Hideki Shimoi, Keisuke Inoue
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Publication number: 20090236985Abstract: A photomultiplier tube 1 is an electron tube comprising an envelope 5 including a frame 3b having at least one end part formed with an opening and an upper substrate 2 airtightly joined to the opening, and a photocathode 6 contained within the envelope 5, the photocathode 6 emitting a photoelectron into the envelope 5 in response to light incident thereon from the outside; wherein multilayer metal films 10b, 10a each constituted by a metal film made of titanium, a metal film made of platinum, and a metal film made of gold laminated in this order are formed at the opening and the joint part between the upper substrate 2 and opening; and wherein the frame 3b and upper side substrate 2 are joined to each other by holding a joint layer 14 containing indium between the respective multilayer metal films 10b, 10a.Type: ApplicationFiled: June 28, 2006Publication date: September 24, 2009Inventors: Hiroyuki Sugiyama, Keisuke Inoue, Hitoshi Kishita, Hideki Shimoi, Hiroyuki Kyushima
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Publication number: 20090224666Abstract: The present invention relates to a photomultiplier having a fine structure capable of realizing high multiplication efficiency. The photomultiplier comprises a housing whose inside is maintained vacuum, and, on a device mounting surface which is a part of an inner wall surface defining an internal space of the housing, a photocathode serving as a reflection type photocathode, an electron-multiplier section, an anode, and a voltage distributing section are disposed integrally. In particular, the electron-multiplier section is constituted by dynodes at multiple stages cascade-multiplying photoelectrons from the photocathode, and the voltage distributing section, which applies corresponding voltages to the dynodes at the respective stages respectively, is on the same surface together with the electron-multiplier section.Type: ApplicationFiled: June 1, 2006Publication date: September 10, 2009Inventors: Hiroyuki Kyushima, Hideki Shimoi, Hiroyuki Sugiyama, Hitoshi Kishita, Suenori Kimura, Yuji Masuda, Takayuki Ohmura
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Publication number: 20090045741Abstract: The present invention relates to a photomultiplier having a fine structure capable of realizing high detection accuracy by effectively suppressing cross talk among electron-multiplier channels. The photomultiplier comprises a housing whose inside is maintained vacuum, and, in the housing, a photocathode, an electron-multiplier section, and anodes are disposed. The electron-multiplier section has groove portions for cascade-multiplying photoelectrons as electron-multiplier channels, and the anodes are constituted by channel electrodes corresponding to the groove portions respectively defined by wall parts. In particular, at least parts of the respective channel electrodes are located in spaces sandwiched between pairs of wall parts defining the corresponding groove portions.Type: ApplicationFiled: June 1, 2006Publication date: February 19, 2009Inventors: Hiroyuki Kyushima, Hideki Shimoi, Hiroyuki Sugiyama, Hitoshi Kishita, Suenori Kimura, Yuji Masuda, Takayuki Ohmura
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Patent number: 6020684Abstract: To provide an electron tube having good airtightness and being appropriate for mass production, indium affixed to the inner surface of a sealing metal support member is provided between a side tube and input faceplate. The input faceplate is pushed against the side tube. As a result, the indium is squeezed by a pressure receiving surface provided on the end face of the side tube. Since the pressure receiving surface is in a generally declining shape from the inside out, the force of the pressing surface causes the indium to flow outward toward the sealing metal support member. Therefore, the indium is firmly affixed to the pressure receiving surface, and the side tube and input faceplate can be reliably sealed by the indium.Type: GrantFiled: January 27, 1998Date of Patent: February 1, 2000Assignee: Hamamatsu Photonics K,K,Inventors: Yasuharu Negi, Toshimitsu Nagai, Atsushi Kibune, Yutaka Hasegawa, Shigeru Ichikawa, Hitoshi Kishita, Norio Asakura, Motohiro Suyama