Photocathode and electron tube
AssigneeHamamatsu Photonics K.K.
InventorsAkihiko Ohtomo, Tsuneo Ihara, Kuniyoshi Mori, Yoshiyuki Natsume
Life of this patent
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Abstract
A photocathode and an electron tube in which the photocathode plate can be securely fixed without using any adhesive. Even under the severe condition that a high vibration resistance is required or thermal stress occurs because of great temperature variation, it can be used widely for an image intensifier, a streak tube, or a photomultiplier. The photocathode plate of the photocathode is sandwiched between a faceplate and a support plate. First pins embedded in the faceplate are joined to the support plate. Therefore, the photocathode plate can be readily fixed securely to the faceplate without using any adhesive.
Claims17
A photocathode (10) characterized by comprising:
- a faceplate (11) having a light incident surface (22) on which light is incident, and a light transmissive surface (21) for transmitting the incident light;
- a photocathode plate (16) in contact with the light transmissive surface (21) of the faceplate (11) for emitting electrons from an electron emitting surface (23) disposed on the opposite side of the surface contact with the light transmissive surface (21) in response to incident light;
- a first pin (12) embedded in the faceplate (11), the first pin (12) extending between the light incident surface (22) of the faceplate (11) and a portion of the light transmissive surface (21) that does not contact the photocathode plate (16);
- and
- a support plate (19) joined to the first pin (12) on the light transmissive surface (21), the support plate (19) contacting an outer edge of the electron emitting surface (23) of the photocathode plate (16) to fix the photocathode plate (16) to the faceplate (11).
Dependencies are inferred from the claim text.