中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

32 records (took 0.022 seconds)

    24.
    发明专利
    未知

    公开(公告)号：DE69406709T2

    公开(公告)日：1998-04-02

    申请号：DE69406709

    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 is constituted by a photocathode and an electron multiplier having a typical structure in which a dynode unit having a plurality of dynode plates stacked in an incident direction of photoelectrons, an anode plate, and an inverting dynode plate are sequentially stacked. Through holes (101) for injecting a metal vapor are formed in the inverting dynode plate (13) to form secondary electron emitting layers on the surfaces of dynodes supported by the dynode plates, and the photocathode. With this structure, the secondary electron emitting layers are uniformly formed on the surfaces of the dynodes. Therefore, variations in output signals obtained from anodes can be reduced regardless of the positions of the photocathode.

    25.
    发明专利
    未知

    公开(公告)号：DE69406709D1

    公开(公告)日：1997-12-18

    申请号：DE69406709

    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 is constituted by a photocathode and an electron multiplier having a typical structure in which a dynode unit having a plurality of dynode plates stacked in an incident direction of photoelectrons, an anode plate, and an inverting dynode plate are sequentially stacked. Through holes (101) for injecting a metal vapor are formed in the inverting dynode plate (13) to form secondary electron emitting layers on the surfaces of dynodes supported by the dynode plates, and the photocathode. With this structure, the secondary electron emitting layers are uniformly formed on the surfaces of the dynodes. Therefore, variations in output signals obtained from anodes can be reduced regardless of the positions of the photocathode.

    ELECTRON TUBE
    28.
    发明公开
    ELECTRON TUBE 有权
    电子管

    公开(公告)号：EP1089320A4

    公开(公告)日：2002-10-25

    申请号：EP99924030

    申请日：1999-06-15

    Applicant: HAMAMATSU PHOTONICS KK

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

    IPC: H01J43/06 ,  H01J43/30 ,  H01J43/24

    CPC classification number: H01J43/06

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

    PEAK LEVEL OR BOTTOM LEVEL DETECTOR
    30.
    发明专利
    PEAK LEVEL OR BOTTOM LEVEL DETECTOR 失效

    公开(公告)号：JPH07135455A

    公开(公告)日：1995-05-23

    申请号：JP27959093

    申请日：1993-11-09

    Applicant: HAMAMATSU PHOTONICS KK ,  HITACHI LTD

    Inventor： SUZUKI TAKAYUKI ,  KYOMASU MIKIO ,  YAMASHITA KIICHI ,  HASEGAWA ATSUSHI ,  HASEGAWA YUTAKA ,  HAMAGISHI TAKAHIRO

    IPC: H03K5/1532

    Abstract: PURPOSE:To obtain a peak or bottom level detector in which a peak level or a bottom level of an input signal is detected at a high speed and a detected output is kept for a long time. CONSTITUTION:A 1st peak detection circuit A detects a peak level at a high speed and the storage time of the charge stored in a capacitor CA is short. A 2nd peak detection circuit B has a somewhat slow operating speed and the storage time of the charge stored in a capacitor CB is long. The arithmetic operation circuit C takes the sum of detection outputs of the circuits A, B. Furthermore, a very small current source circuit D extracts very small currents from the capacitors CA, CB and a discharge time constant of the charge stored in the capacitors CA, CB is controlled. A peak level or a bottom level outputted from the arithmetic operation circuit C are provided as an output at a high speed by the circuit A and kept for a long time by the circuits B, D.

Patent Agency Ranking