Free-space laser communication system having six axes of movement
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United States of America Patent
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Feb 12, 2002
Grant Date -
N/A
app pub date -
Nov 3, 1998
filing date -
Nov 3, 1998
priority date (Note) -
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Abstract
A free-space laser communication system having six axes of movement. The system includes a fine tracking and acquisition system comprising a low inertia steering mirror having two axes of movement which points the communication laser transmission optical apertures separately from the optical apertures for the beacon laser, a coarse tracker, and a communication receiver. A fine tracking centroider and the communication lasers have the steerable mirror in common, and thus do not experience any alignment error that might arise from use of a separate deflecting element for each. The fine tracking and acquisition system is preferably mounted on a gimbal having two axes of movement, and the gimbal in turn is preferably mounted in a housing having two axes of movement.
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