Patent ID: 6707052
Filing Date: 2004-03-16
Classification: F41H

Abstract:
A countermeasures system arranged to deceive an attack unit as said attack unit approaches a defense unit, said attack unit having a reflecting medium which when illuminated will reflect modulated radiation due to movement and discontinuities in said reflecting medium, said countermeasures system comprising,(a) a defense unit having (1) an attack unit detecting means (2) a radiation source capable of modulated and continuous operation (3) means responsive to a signal produced by said attack unit (4) detecting means to activate said radiation source to illuminate said attack unit when said attack unit is detected by said detecting means. (b) a radiation detection means responsive to said modulated radiation reflections of light from said attack unit producing output signals, (c) a generator arranged to provide a second signal at the modulation frequency of said output signals from said detection means and with a phase different from that of said detection means output (d) means modulating said radiation source in accordance with said second signal.