Image intensifier devices
AssigneeEnglish Electric Valve Company Limited
InventorAnthony J. Woolgar
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Abstract
The invention provides a multi stage image intensifier arrangement in which, for any stage, means are provided responsive to the photo current of the stage for discharging capacitance associated with that stage so as to limit the level of current density to which the anode screen of that stage is subjected as a result of a high intensity input flash of light.
Claims8
An image intensifier arrangement including at least one stage and means responsive to the photo current of said stage for discharging capacitance associated with that or another stage, whereby to limit the level of current density to which the anode screen of said last mentioned stage is subjected as a result of a high intensity input flash of light, wherein said responsive means comprises a resistance in a supply path for operating potential to either the photo cathode or the anode screen of a stage, an a.c. coupled amplifier connected across said resistance and providing an output, and an active device triggerable by said amplifier output to discharge said capacitance as aforesaid.
Dependencies are inferred from the claim text.