中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

32 records (took 0.024 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE69927814T2

    公开(公告)日：2006-04-27

    申请号：DE69927814

    申请日：1999-06-15

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： SHIMOI HIDEKI ,  KYUSHIMA HIROYUKI ,  HASEGAWA YUTAKA ,  NAGAI TOSHIMITSU

    IPC: H01J43/06 ,  H01J29/84 ,  H01J31/50 ,  H01J43/30

    Abstract: To prevent the deterioration in sensitivity of the photocathode (20) of an electron tube and maintain stable output for a long time, an ion confining electrode (22) and an ion trap electrode (23) are provided between the photocathode (20) and a first stage dynode (24a). The potential of the ion confining electrode (22) is set higher than that of the first stage dynode (24a), while the potential of the ion trap electrode (23) is set equal to or higher than that of the photocathode (20) and lower than that of the first stage dynode 24a. Since the feedback to the photocathode (20) of the positive ions generated in the vicinity of the first stage dynode can be effectively suppressed, the sensitivity of the photocathode (20) is prevented from decreasing, and stable output is maintained for a long time.

    2.
    发明专利
    未知

    公开(公告)号：DE69819376T2

    公开(公告)日：2004-09-16

    申请号：DE69819376

    申请日：1998-01-27

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： NEGI YASUHARU ,  NAGAI TOSHIMITSU ,  KIBUNE ATSUSHI ,  HASEGAWA YUTAKA ,  ICHIKAWA SHIGERU ,  KISHITA HITOSHI ,  SUYAMA MOTOHIRO ,  ASAKURA NORIO

    IPC: H01J5/22 ,  H01J31/50

    Abstract: To provide an electron tube having good airtightness and being appropriate for mass production, indium (23) affixed to the inner surface of a sealing metal support member (24) is provided between a side tube (10) and input faceplate (21). The input faceplate (21) is pushed against the side tube (10). As a result, the indium (23) is squeezed by a pressure receiving surface (70) provided on the end face of the side tube. Since the pressure receiving surface (70) is in a generally declining shape from the inside out, the force of the pressing surface (70) causes the indium (23) to flow outward toward the sealing metal support member (24). Therefore, the indium (23) is firmly affixed to the pressure receiving surface (70), and the side tube (10) and input faceplate (21) can be reliably sealed by the indium (23).

    3.
    发明专利
    未知

    公开(公告)号：DE69725394D1

    公开(公告)日：2003-11-13

    申请号：DE69725394

    申请日：1997-07-16

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： SUYAMA MOTOHIRO ,  KIMURA SUENORI ,  ASAKURA NORIO ,  HIRANO KEN ,  KAWAI YOSHIHIKO ,  HASEGAWA YUTAKA ,  MORITA TETSUYA

    IPC: H01J43/28

    Abstract: The present invention relates to an electron tube comprising, at least, a cathode electrode and a face plate having a photocathode which are arranged at one end of a body, and a stem arranged at the other end of the body for defining the position of an electron entrance surface where the electron emitted from the photocathode reaches. The object of the present invention is to provide an electron tube which can reduce its size and has a structure for improving the workability in its assembling process. In particular, the electron tube in accordance with the present invention comprises a bonding ring, provided between the face plate and the cathode electrode, for bonding the face plate and the cathode electrode together. The bonding ring is made of a metal material selected from the group consisting of In, Au, Pb, alloys containing In, and alloys containing Pb.

    4.
    发明专利
    未知

    公开(公告)号：DE69504139D1

    公开(公告)日：1998-09-24

    申请号：DE69504139

    申请日：1995-06-06

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： KYUSHIMA HIROYUKI ,  HASEGAWA YUTAKA ,  ATSUMI AKIRA ,  NAGURA KOJI

    IPC: H01J9/18 ,  H01J43/22

    Abstract: A photomultiplier of the present invention has an electron multiplier of a structure which can be manufactured easily. This electron multiplier is constituted by dynode plates that are stacked through insulators so as to be separated from each other at a predetermined interval. Each dynode plate comprises upper- and lower-electrode plates that are electrically connected to each other. The upper- and lower-electrode plates grip at least one of the insulators such that the gripped insulator is partly exposed.

    7.
    发明专利
    未知

    公开(公告)号：DE69404079D1

    公开(公告)日：1997-08-14

    申请号：DE69404079

    申请日：1994-04-28

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： KYUSHIMA HIROYUKI ,  NAGURA KOJI ,  HASEGAWA YUTAKA ,  KAWANO EIICHIRO ,  KUROYANAGI TOMIHIKO ,  ATSUMI AKIRA ,  MIZUIDE MASUYA

    IPC: H01J9/12 ,  H01J9/18 ,  H01J43/04 ,  H01J43/10 ,  H01J43/12 ,  H01J43/22

    Abstract: A photomultiplier comprising an electron multiplier for minimizing a variation in multiplication factor and noise is characterized in that insulating members (80a,b) are aligned on the same line (606) to insulate a plurality of dynode plates for constituting a dynode unit from each other, thereby preventing a damage to each dynode plate. At the same time, a through hole (600) is formed to fix the insulating member provided to each dynode plate such that a gap is provided between the major surface of the dynode plate and the surface of the insulating member, thereby preventing discharge between dynode plates, which is caused due to dust or the like deposited on the surface of the insulating member.

    8.
    发明专利
    未知

    公开(公告)号：DE69404538T2

    公开(公告)日：1997-12-11

    申请号：DE69404538

    申请日：1994-04-28

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： KYUSHIMA HIROYUKI ,  NAGURA KOJI ,  HASEGAWA YUTAKA ,  KAWANO EIICHIRO ,  KUROYANAGI TOMIHIKO ,  ATSUMI AKIRA ,  MIZUIDE MASUYA

    IPC: H01J9/12 ,  H01J9/18 ,  H01J43/04 ,  H01J43/10 ,  H01J43/12 ,  H01J43/22

    Abstract: A photomultiplier includes a photocathode and an electron multiplier. A typical structure of the electron multiplier is obtained such that a dynode unit constituted by stacking a plurality of dynode plates in the incident direction of photoelectrons, an anode plate, and an inverting dynode plate are stacked. The anode plate (5) has electron through holes at a predetermined portion to cause secondary electrons emitted from the dynode unit (13) to pass therethrough. Each electron through hole has a diameter on the inverting dynode plate side larger than that on the dynode unit side, thereby increasing the capture area of the secondary electrons orbit-inverted by the inverting dynode plate.

    10.
    发明专利
    未知

    公开(公告)号：DE69404538D1

    公开(公告)日：1997-09-04

    申请号：DE69404538

    申请日：1994-04-28

    Applicant: HAMAMATSU PHOTONICS KK

    Inventor： KYUSHIMA HIROYUKI ,  NAGURA KOJI ,  HASEGAWA YUTAKA ,  KAWANO EIICHIRO ,  KUROYANAGI TOMIHIKO ,  ATSUMI AKIRA ,  MIZUIDE MASUYA

    IPC: H01J9/12 ,  H01J9/18 ,  H01J43/04 ,  H01J43/10 ,  H01J43/12 ,  H01J43/22

    Abstract: A photomultiplier includes a photocathode and an electron multiplier. A typical structure of the electron multiplier is obtained such that a dynode unit constituted by stacking a plurality of dynode plates in the incident direction of photoelectrons, an anode plate, and an inverting dynode plate are stacked. The anode plate (5) has electron through holes at a predetermined portion to cause secondary electrons emitted from the dynode unit (13) to pass therethrough. Each electron through hole has a diameter on the inverting dynode plate side larger than that on the dynode unit side, thereby increasing the capture area of the secondary electrons orbit-inverted by the inverting dynode plate.

Patent Agency Ranking