TRANSMITTING TYPE PHOTOELECTRIC CATHODE AND ELECTRON TUBE

摘要

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.