Codable optical transponder

Details Codable optical transponder Codable optical transponder

1970-07-10

1978-07-04

Moskowitz, Nelson

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 98, H04B 908

Patent

active

040990508

ABSTRACT:
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.

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patent: 3215842 (1965-11-01), Thomas
patent: 3225177 (1965-12-01), Stites et al.
patent: 3227882 (1966-01-01), Bissett et al.
patent: 3502888 (1970-03-01), Stites
patent: 3521280 (1970-07-01), Janco et al.
Barber, "21 Ways to Pick Data Off Moving Objects", 10/63, pp. 82-83, Control Engineering, vol. 10, #10.

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