Remote data monitoring system
US4731879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1984 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Aug 3, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.