Photomultiplier

Details Photomultiplier Photomultiplier

1993-08-06

1995-08-01

Sikes, William L.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250216, 250228, 250250, H01J 4318, H01J 4014

Patent

active

054381916

ABSTRACT:
The present invention pertains to a photomultiplier of head-on type that has a transparent tubular glass bulb and a principal photocathode formed on the internal surface of a closed end of the glass bulb, that is, on the internal surface of a light entrance window. In addition, this photomultiplier has a side photocathode formed on the entire internal surface of side wall of the glass bulb in the region adjacent to the principal photocathode. A reflection film is formed on the outer surface of side wall of the glass bulb and opposes to the side photocathode. Some light entering the peripheral portion of the light entrance window of the glass bulb and traveling toward the outer surface of side wall is reflected inwardly by the reflection film and reaches the side photocathode, where the light is to be converted into photoelectrons. The photoelectrons are guided to the electron multiplying unit in glass bulb, where the photoelectrons are multiplied and detected by an anode.

REFERENCES:
patent: 3567948 (1971-03-01), Oke et al.
patent: 4306171 (1981-12-01), Faulkner et al.
patent: 4937506 (1990-06-01), Kimura et al.

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