Abstract: A system for protecting strategic facilities against terrorists by providing perimeter intrusion detection and deterrence is realized by employing sensors operating in “solar blind” region of the ultraviolet spectrum. Such sensors are unique in that their performance is not background noise limited, as well as operable under low visibility conditions. In one preferred embodiment, the inventive “terrorist shield” system comprises two shields surrounding a strategic facility. A detection shield arranged along a circumference at a known radius from the center of the strategic facility serves as the primary means of detection. The detection shield employs UV sources and sensors housed in poles arranged equidistant along the outer circumference of the detection shield. The system also includes a deterrent shield, representing the countermeasures employed in thwarting the terrorist as he approaches or nears the lethal range of the facility.

Abstract: A system for enhancing navigation or surveillance in low visibility conditions is realized by employing one or more ultraviolet radiation sources, a receiver which is capable of producing output signals from which a two dimensional image of the received radiation can be constructed, and a display device for displaying such image. In one preferred embodiment the ultraviolet radiation source is co-positioned with a critical marker such as a runway beacon or hazard beacon. The ultraviolet radiation emanates from the source, preferably modulated to form a repetitive, characteristic signal, propagates through the low visibility atmosphere, and received by the ultraviolet imaging receiver. In another preferred embodiment, an ultraviolet radiation source is placed at or near the ultraviolet imaging receiver, that is, onboard the same vehicle or at the same fixed location. One or more reflectors are co-positioned with the critical markers.

Abstract: A dual line of sight forward looking infrared (FLIR) navigation and targeting system including two separate infrared turrets housing respective optical gimbal assemblies which simultaneously provide two independently controlled lines of sight, one of which has wide field(s) of view for implementing a pilotage function and the other has narrow magnified field(s) of view for implementing a targeting function. Both lines of sight are merged following individual temperature compensating image gain and level adjusting operations in an optical multiplexer assembly, the output of which is coupled to a single IR detector in the form of a focal plane array having time delay integration. Two separate FLIR video image signals are generated in a single common processor, one for pilotage and one for targeting which can be viewed simultaneously and independently. The processor is also utilized and integrated with a radar system.