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Laser Tracker II: Sandia National Laboratories second-generation laser tracking system

Laser Tracker II has essentially one moving part. A double-gimbaled mirror directs two laser beams to a cooperative target. The mirror catches the return beams and an optical image for test information. The receivers for the return beams are image dissectors. During the test the dissectors sense a change in target position and generate an error signal to drive the mirror. To produce real-time three-dimensional position data, the tracker uses range, azimuth, and elevation readings. This raw data is shipped through the real-time control microcomputer system to a minicomputer which is also used to operate the tracker. A second minicomputer is used to produce finished trajectory data.