Observation instrument orientation detecting system

G - Physics – 02 – B

Patent

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Details

G02B 23/14 (2006.01) G01C 11/02 (2006.01) G01S 3/786 (2006.01) G01S 5/16 (2006.01) G01S 17/87 (2006.01) G02B 23/00 (2006.01)

Patent

CA 2178624

Angular position finding system for an observation instrument (1), possibly fitted with a sighting change mirror (6) and which includes one or two reflecting mirrors (25) and one or two alignment sensors (10) light patterns are produced both on the instrument and on the alignment sensor and are reflected by the mirror (9) to the alignment sensor where their positions are detected. The orientation of the mirror, and indirectly the orientation of the instrument, can be deducted. Furthermore, if the alignment sensor is equipped with means for determining an absolute orientation reference, the orientation of the instrument with respect to this reference may also be known Application to artificial satellites, particularly for Earth observation.

Système de repérage d'orientation d'un instrument d'observation (1), éventuellement pourvu d'un miroir de changement de visée (6) et qui comprend un ou deux miroirs de renvoi (25) et un ou deux capteurs d'alignement (10). Des motifs lumineux sont produits à la fois sur l'instrument et sur le capteur d'alignement et renvoyés par le miroir (9) vers le capteur d'alignement où leurs positions sont détectées. On peut en déduire l'orientation du miroir et indirectement l'orientation de l'instrument. Si de plus le capteur d'alignement est équipé de moyens pour déterminer une référence absolue d'orientation, l'orientation de l'instrument par rapport à cette référence peut aussi être connue. Application aux satellites artificiels, en particulier pour l'observation de la Terre.

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