| 摘要 |
<p>Information transmitting method using a laser beam projector which forms part of an optical missile guidance system on board a ship say. For transmitting information to another ship the same beam projector 4 is used to scan a field containing a detector 7 on board the other ship so that the detector receives successive glimpses of the beam at times dependent on the information to be transmitted. Alternatively, after acquisition of the detector in this way, the projector can be aligned by feedback and the beam modulated using conventional amplitude or pulse modulation. The specification also discloses developments of the missile guidance systems described in GB applications 2113939A and 2133652A for example blanking of the projector beam as it is scanned over the target to prevent detection of the projector source by the enemy target. <IMAGE></p> |
