| 摘要 |
56,935 A machine apparatus with a laser guidance system, the apparatus having at least two elements each movable along a predetermined path, and a laser control system for controlling the position of each of said elements by use of a laser beam aligned to be modulated by the movement of such element so as to determine its position. A fiber optic network is used to couple light beams generated by one or more lasers to each element and to return a position-modulated laser light from each element to a central control unit. The system also preferably includes means for monitoring the alignment of the laser beam at each element, and making corrective adjustments in the case of any misalignment.
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