Remote data monitoring system

Details Remote data monitoring system Remote data monitoring system

1984-08-03

1988-03-15

Orsino, Jr., Joseph A.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

H04B 900

Patent

active

047318791

ABSTRACT:
The present remote data monitoring system employs a laser and a modulated retroreflector for the remote data monitoring of hard to access spaces, targets etc., in combination with an arrangement for a simultaneous friend-or-foe identification, and in combination with devices for the protection against detection and against interrogation of a friend by an enemy laser. In this system, a liquid crystal modulator of special construction depending on the purpose and structure of the system, is arranged in front of a retroreflector and modulated by the respective information. The information is interrogated by a spatially distant laser station by directing a laser beam onto the retromodulator, whereby the information is retroreflected and simultaneously modulated.

REFERENCES:
patent: 3675989 (1972-07-01), Pietsch et al.
patent: 3989942 (1976-11-01), Waddoups
patent: 4096380 (1978-06-01), Eichweber
patent: 4131791 (1978-12-01), Lego, Jr.
patent: 4134008 (1979-01-01), de Corligu et al.

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