| 摘要 |
A computerized control system for driving a rotor which can carry a laser or a beam deflecting mirror and is actuated by a coil thereon electromagnetically coupled to a fixed magnet or a stepper motor coil (3). The rotor can be part of an electromechanical oscillatory system supported by flexures or the stepper motor can be electrically biased to produce, electrodynamically, a restoring force. The back EMF of the coil is sensed (9), translated into successive digital signals (6) which are processed in accordance with programs in firmware of the computer (7) to generate driving pulses (8) which are applied to the coil (3) to obtain desired displacement motion of oscillation suitable for scanning the beam.
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