Codable Optical Transponder.
DEPARTMENT OF THE AIR FORCE WASHINGTON D C
Pagination or Media Count:
A transponder illuminated by broadband optical radiation which is reflected back towards the illuminator by means of corner reflectors. In front of the corner reflectors are placed a plurality of narrow band filters which define the communication channels. The return signal will consist of the activation of a number of discrete channels corresponding to the number of filters used. The system is not restricted to the visible spectrum permitting infrared and ultraviolet radiation to be used to provide a covert communication system. Author
- Optical Detection and Detectors