Abstract
A system for the rotation of a dispersive laser element with a stepper motor is described. The motor is controlled by a personal computer that can be located at a distance of more than 20 m from the motor. The stepper control unit is connected to the computer interface board by a twin line. The system ensures highly reliable operation under conditions of intense electromagnetic noises from the laser power supply system due to the use of noise-suppressing differential transmission lines and optoelectronic isolators.
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