| 摘要 |
<p>A free space laser communication system that maintains dynamic alignment is comprised of two laser transceivers positioned a distance apart, a beacon laser (10) is provided for transmitting a beacon beam at a first wavelength in a beam having a first divergence. A signal laser (18)is provided for transmitting a signal beam carrying information to be transmitted to the other transceiver. A telescope system (2) is provided for collecting both the incoming beacon beam and the incoming signal beam from the other transceiver and for transmitting at least an outgoing signal beam. The telescope, which pivots at least in tilt and tip, images the pupil of the telescope onto a tracking mirror (14). The beacon beam is reflected from the tracking mirror and focused on a CCD array (26) which monitors the direction of the beacon beam and provides a feedback signal to the tracking mirror to maintain the tracking mirror positions which direct the beacon beam to a predetermined position on the CCD array and also directs the signal beam through a small aperture (34) to a signal detector (42).</p> |
