| 摘要 |
A method for measuring the position of a moving object. A laser beam is deflected over the measurement region via a rotating mirror. A rotating driven plate on the rotating mirror results in the angular speed remaining constant with time, with respect to the stationary space. High-accuracy angular measurement is achieved by measuring the times. A light sensor on the moving measurement object and a stationary reference sensor receive the laser light and control the time measurement. The time interval is counted electronically and produces the meaurement angle, normalized to the revolution time. A plurality of measurement angles, determined simultaneously from various spatial directions, can be converted digitally into linear location coordinates. Another version with a large-area light sensor uses the shadow of the measurement object to determine its size or position. Furthermore, an arrangement having a plurality of light sensors and an optically expanded beam for measuring all 3 displacement coordinates and 3 rotation coordinates.
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