Airborne optoelectronic system for identification and localization with compensated and facetted port
US5071226A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1990 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Dec 4, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is an airborne optoelectronic system using a facetted port. There is provision for compensation means in the form of two prisms with variable index, each formed by a lateral facet and a second facet forming a cavity, within which the refractive index is adjusted by the control of the internal gas pressure. The variation in the pressure with the cavity is achieved by following a control point value depending notably on the altitude of the carrier and the orientation of the line of sight. This results in eliminating the doubling of the image which occurs when there is no compensation when the altitude of the carrier varies and when the incident flux is distributed among the facets. The disclosed device can be applied to optoelectronic systems for warplanes, the flight altitudes of which may vary widely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.