Abstract: A weapon-sight system for use with a weapon for performing wireless target acquisition of a target is disclosed. The system includes a weapon sight that is mountable onto the weapon and adapted to capture a thermal weapon-sight image of the target and transmit a wireless signal representative of the weapon-sight image. The system also includes a display system that is not physically connected to either the weapon sight or to the weapon and that is adapted to capture a thermal display-system image of the target. The display system includes a processor configured to combine the weapon-sight image and the display-system image so that a user can view at least a portion of the weapon-sight image using the display of the display system.

Abstract: A heterodyning lock-in amplifier in which the reference signal is shifted up in frequency (as in prior art designs), but then shifted back down in frequency prior to mixing with the input signal.