| 摘要 |
A light system includes a laser light generator and an array of motor-driven mirrors aligned to deflect a beam of laser light in various directions to create a light show. The motors are operated in a controlled sequence by a motor controller. The motors are small d.c. permanent magnet motors which are driven from a d.c. source whose voltage is adjustable to vary the frequency of oscillation of the motors and, hence the mirrors. Connected to each motor is a small coil spring whose coil is carried on the motor shaft and which has two extended arms, one of which is secured to a nearly stationary member and one which is secured to the mirror shaft. The mirror shaft is movable between two stops. The spring acts to oppose the direction of motion of the motor such that the motor is normally stalled out and driven back to one of the stops before it can be moved for enough to impact the other stop.
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