Abstract: Boresighting of an outgoing first laser beam axis to an imaging sensor reference axis is described by aligning a second laser beam axis, which is in fixed relation to the first laser beam axis, to an electromagnetic source reference beam axis and detecting the angular displacement between the second laser beam and the reference beam axes. The sensor reference axis is in fixed relationship to the reference beam axis. Error signals are generated by the detector which are proportional to the angular displacement and are utilized to correct the angular displacement to align the second laser beam and the reference beam axes. When the first laser beam is boresighted to the sensor reference axis, the image of the reference beam source in the sensor display will represent the target object to which the outgoing first laser beam is directed.

Abstract: A command-to-line-of-sight missile tracking system which employs spectral velength diversity and amplitude modulation of a beacon to effect an optical FM data link. The disclosed system provides advantages of suppression of interference radiation within the tracker field of view and relative simplicity of tracker mechanization.

Abstract: An aircraft proximity warning indicator incorporating an RF receiver, optical sensor, and display is described which may receive an RF signal followed by an optical radiation pulse from another aircraft where the received RF signal is used to control the optical sensor and display so that it senses and displays the optical radiation pulse.