Image intensifier tube device

Details Image intensifier tube device Image intensifier tube device

1977-09-15

1981-04-28

Dahl, Lawrence J.

Electric lamp and discharge devices

Secondary emission prevention

Nonemissive material

250213VT, H01J 3900

Patent

active

RE0305960

ABSTRACT:
An image intensifier tube device including a plurality of diode image intensifier tubes. Each tube comprises a sealed cylindrical envelope having its one end closed by an entry window carrying a photo-sensitive, electron emitting layer enclosed by a good electrically conductive rim. A resistive layer is deposited by vaporization between the circumference of the electron emitting layer and the good electrically conductive rim, which resistive layer is connected to a terminal of a voltage source having its other terminal connected to an anode and to focussing means of the tube such that in response to a sudden increase in the brightness of the image to be intensified a voltage drop is produced across the resistive layer, as a result of which the emitted electrons are de-focussed and/or deflected.

REFERENCES:
patent: 3280356 (1966-10-01), Stoudenheimer et al.
patent: 3706903 (1972-12-01), Hansen
patent: 3708673 (1973-01-01), Blacker, Jr.

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