Accession Number : ADD016269

Title :   Multi-Channel, Covert, Non-Line-Of-Sight UV Communication.

Descriptive Note : Patent, Filed 8 Mar 88, patented 5 Apr 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Geller, Myer

Report Date : 05 Apr 1994

Pagination or Media Count : 8

Abstract : A system enables omnidirectional non-line-of-sight simultaneous communications in a number of frequency separated channels in the ultraviolet spectrum. A plurality of discharge lamps each has at least a single different isotope of mercury for each omnidirectionally radiating a discrete line in the ultraviolet spectrum. Each of the discrete lines in the ultraviolet spectrum is modulated by an on-off sequence generator so that modulated discrete lines transmit communications to a number of receivers randomly disposed in a non-line-of-sight relationship to the discharge lamps. Absorption filters at each receiver contain a quenching gas and all the other isotopes of mercury except the one which generated the modulated discrete line of interest.

Descriptors :   *DISCHARGE LAMPS, *LINE OF SIGHT, *PATENTS, *ULTRAVIOLET COMMUNICATIONS, CHANNELS, FILTERS, FREQUENCY, GENERATORS, ISOTOPES, LAMPS, MERCURY, OMNIDIRECTIONAL, QUENCHING, RECEIVERS, SEQUENCES, VISION, ULTRAVIOLET SPECTRA, MODULATION, ULTRAVIOLET RADIATION

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE