Abstract:
A transmitting type photoelectric cathode comprising a light absorbing layer (1) formed of diamond or a material mainly containing diamond, a support frame (21) for reinforcing the mechanical strength of the light absorbing layer (1), a first electrode (31) provided for the incident surface of the light absorbing layer (1), and a second electrode (32) provided for the outgoing surface of the light absorbing layer (1). Voltage is applied between the incident surface and the outgoing surface of the light absorbing layer (1) to form an electric field inside the light absorbing layer (1). When light to be detected is incident to generate photoelectrons in the light absorbing layer (1), photoelectrons are accelerated in an outgoing direction by the electric field formed inside the light absorbing layer (1) to be discharged to the outside of a transmitting type photoelectric cathode.
Abstract:
A polycrystalline diamond thin film which has an average particle size of at least 1.5 mu m and a peak intensity in the vicinity of wavelength of 1580 cm in a Raman spectrum obtained by a Raman spectroscopy having a ratio of up to 0.2 with respect to a peak intensity in the vicinity of wave number of 1335 cm . A photocathode (2) and an electron tube (1) are each provided with the above polycrystalline diamond thin film as a light absorbing layer (22).
Abstract in simplified Chinese:本发明系有关一种可同时应用于穿透式和反射式的光阴极,且较之单晶钻石薄膜的光阴极可产生更高的量子效益,以及具有此光阴极的电子管。根据本发明的光阴极至少包括一个由多晶钻石、或主要成份是多晶钻石的材料所组成的第一层。于一种光阴极的修正修实例中,第一层的表面是以氢原子或氧原子为终结。此外,可于多晶钻石薄膜的表面提供一种由碱金属或其化合物组成的第二层,且其表面是以氢原子或氧原子为终结。