Airborne optoelectronic system for identification and localizati

Details Airborne optoelectronic system for identification and localizati Airborne optoelectronic system for identification and localizati

1990-12-04

1991-12-10

Henry, Jon W.

Optical: systems and elements

Prism

Fluid filled

356152, 2502036, G02B 506, G01B 1126, G01C 300

Patent

active

050712268

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.

REFERENCES:
patent: 3514192 (1970-05-01), De La Cierva
patent: 4614405 (1986-09-01), Brandenberg et al.

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