Patent ID: 11901168
Assignee: ELBIT SYSTEMS OF AMERICA, LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of controlling the performance of a night vision device, the night vision device including a power supply and an image intensifier tube in communication with the power supply, the method comprising:
supplying, by the power supply, to a microchannel plate of the image intensifier tube, a control voltage that controls a gain of the microchannel plate;
determining an amount of compensation to apply to the control voltage based on a change to the control voltage attributed to a change in temperature of an operating environment of the night vision device;
adjusting the control voltage in accordance with the amount of compensation to obtain a compensated control voltage; and
supplying, by the power supply, the compensated control voltage to the microchannel plate of the light intensifier tube
wherein the compensated control voltage is calculated according to the following equation:

V(t)=V(tprevious)+Δt*ΔV*δ(T),

wherein V(t) is the compensated control voltage at a given time t, ΔV is a correction added to a set point of the control voltage, δ(T) is a correction due to temperature, Δt is an amount of time the night vision device has been subject to a high light condition.