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    • 33. 发明公开
    • Photocathode, photomultiplier abnd electron tube
    • Photocathode,photomultiplier abnd electron tube
    • EP1939917A3
    • 2008-07-23
    • EP07024966.9
    • 2007-12-21
    • HAMAMATSU PHOTONICS K.K.
    • Watase, FumioYamashita, ShinichiWatanabe, Horoyuki
    • H01J1/34H01J1/35H01J40/06
    • H01J1/34H01J1/35H01J43/00
    • The present invention relates to a photocathode (1A) having a structure to dramatically improve the effective quantum efficiency in comparison with that of a conventional art, an photomultiplier and an electron tube. The photocathode comprises a supporting substrate (100A) transmitting or blocking an incident light, a photoelectron emitting layer (300) containing an alkali metal provided on the supporting substrate, and an underlayer (200) provided between the supporting substrate and the photoelectron emitting layer. Particularly, the underlayer contains a beryllium oxide, and is adjusted in its thickness such that a thickness ratio of the underlayer to the photoelectron emitting layer falls within a specific range. This structure allows to obtain a photocathode having a dramatically improved quantum efficiency.
    • 本发明涉及具有与常规技术,光电倍增器和电子管相比显着提高有效量子效率的结构的光电阴极(1A)。 光电阴极包括透射或阻挡入射光的支撑基板(100A),设置在支撑基板上的包含碱金属的光电子发射层(300),以及设置在支撑基板和光电子发射层之间的底层(200)。 特别地,底层含有氧化铍,并且调节其厚度以使底层与光电子发射层的厚度比落入特定范围内。 该结构允许获得具有显着提高的量子效率的光电阴极。
    • 34. 发明公开
    • Photocathode, photomultiplier abnd electron tube
    • Photokathode,Photovervielfacher undElektronenröhre
    • EP1939917A2
    • 2008-07-02
    • EP07024966.9
    • 2007-12-21
    • HAMAMATSU PHOTONICS K.K.
    • Watase, FumioYamashita, ShinichiWatanabe, Horoyuki
    • H01J1/34H01J1/35H01J40/06
    • H01J1/34H01J1/35H01J43/00
    • The present invention relates to a photocathode havmg a structure to dramatically improve the effective quantum efficiency in comparison with that of a conventional art, an photomultiplier and an electron tube. The photocathode comprises a supporting substrate transmitting or blocking an incident light, a photoelectron emitting layer containing an alkali metal provided on the supporting substrate, and an underlayer provided between the supporting substrate and the photoelectron emitting layer. Particularly, the underlayer contains a beryllium oxide, and is adjusted in its thickness such that a thickness ratio of the underlayer to the photoelectron emitting layer falls within a specific range. This structure allows to obtain a photocathode having a dramatically improved quantum efficiency.
    • 本发明涉及一种光电阴极(1A),其具有与常规技术相比有显着提高有效量子效率的结构,光电倍增管和电子管。 光电阴极包括透射或阻挡入射光的支撑衬底(100A),包含设置在支撑衬底上的碱金属的光电子发射层(300)和设置在支撑衬底和光电子发射层之间的底层(200)。 特别地,底层包含氧化铍,并且调节其厚度,使得底层与光电子发射层的厚度比落在特定范围内。 该结构允许获得具有显着提高的量子效率的光电阴极。