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公开(公告)号：US08421354B2
公开(公告)日：2013-04-16
申请号：US11960169
申请日：2007-12-19
Applicant: Fumio Watase , Shinichi Yamashita , Hiroyuki Watanabe
Inventor： Fumio Watase , Shinichi Yamashita , Hiroyuki Watanabe
Abstract: The present invention relates to a photocathode 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 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.
Abstract translation: 本发明涉及一种光电阴极，其具有与常规技术，光电倍增管和电子管相比显着提高有效量子效率的结构。 光电阴极包括透射或阻挡入射光的支撑衬底，在支撑衬底上设置含有碱金属的光电子发射层，以及设置在支撑衬底和光电子发射层之间的底层。 特别地，底层含有氧化铍，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。 这种结构允许获得具有显着提高的量子效率的光电阴极。
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公开(公告)号：US20100096985A1
公开(公告)日：2010-04-22
申请号：US11960169
申请日：2007-12-19
Applicant: Fumio WATASE , Shinichi Yamashita , Hiroyuki Watanabe
Inventor： Fumio WATASE , Shinichi Yamashita , Hiroyuki Watanabe
Abstract: The present invention relates to a photocathode 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 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.
Abstract translation: 本发明涉及一种光电阴极，其具有与常规技术，光电倍增管和电子管相比显着提高有效量子效率的结构。 光电阴极包括透射或阻挡入射光的支撑衬底，在支撑衬底上设置含有碱金属的光电子发射层，以及设置在支撑衬底和光电子发射层之间的底层。 特别地，底层含有氧化铍，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。
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公开(公告)号：US4286294A
公开(公告)日：1981-08-25
申请号：US964657
申请日：1978-11-29
Applicant: Shunsaku Nakauchi , Fumio Watase
Inventor： Shunsaku Nakauchi , Fumio Watase
CPC classification number: G11B27/3018 , G11B20/225 , G11B23/0007 , G11B2220/20 , G11B2220/90 , G11B2220/913
Abstract: In the case that an analog signal is recorded or reproduced by using a sensor and recording medium relatively moving against the sensor, a sampling signal is generated which is adapted to have a frequency thereof deviated dependently upon an amount of wow and flutter caused by fluctuations in the speed of the relative motion therebetween. A reproduced signal is sampled by means of the sampling signal and, a sampled signal is stored in a memory. After this, a stored contents in the memory are read out by using a reading signal with a predetermined frequency, thereby to remove from the reproduced signal varying frequency components caused by the wow and flutter.
Abstract translation: 在通过使用相对于传感器移动的传感器和记录介质来记录或再现模拟信号的情况下，产生一个采样信号，该采样信号的频率依赖于由波动引起的哇音和颤动的数量而偏离 其间的相对运动的速度。 通过采样信号对再现信号进行采样，采样信号被存储在存储器中。 此后，通过使用具有预定频率的读取信号来读出存储器中的存储内容，从而从再现信号中去除由哇音和颤动引起的变化频率分量。
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