optical flash

flash to bang / flash-to-bang (time)

flash-ranging (location), flash-spotting

electro-optical countermeasures

electro-optical sensor

electro-optical system

optical decoy

optical device

optical electronic countermeasures

optical gas mask

optical homing

optical intelligence

optical mine-hunting

optical munitions

optical range

optical relay

optical sight

optical target-sensor

optical tracking

artillery optical reconnaissance

electro-optical warfare system

helmet-mounted optical display

optimized optical link helmet-mounted display

optical communication

optical receiver

optical transmitter

optical-fiber communication

radio-optical line of sight

electro-optical glide bomb

over-the-horizon optical communication

optical maser

optical maser radiation weapon

optical maser system