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

Claim 10:
11. A power supply for a light intensifier of a night vision device, the power supply comprising:
power supply circuitry that is configured to supply a control voltage to the light intensifier;
a chronometer;
a temperature sensor;
a memory configured to store control logic; and
a processor that is in communication with the chronometer, the temperature sensor and the memory, wherein the processor is configured to execute the control logic to:
supply, by the power supply circuitry, to a microchannel plate of the light intensifier, a control voltage that controls a gain of the microchannel plate;
determine, based on a value of the chronometer, whether the night vision device has been used for a predetermined amount of time;
when the night division device has been used for the predetermined amount of time, determine 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 based on a value of the temperature sensor;
adjust the control voltage in accordance with the amount of compensation to obtain a compensated control voltage; and
supply, by the power supply circuitry, the compensated control voltage to the microchannel plate of the light intensifier,

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.