| 摘要 |
The invention relates to a method and a device for measuring optical distanc e by emitting an amplitude-modulated, bundled optical signal and by receiving the signal reflected on the target object. The modulation frequency is continuously regulated by means of a regulation loop in such a way that a fixed phase difference, which is independent from the distance, is maintaine d between the emitted signal and the received signal. The aim of the invention is to reduce the means required for the distance evaluation circuit, simultaneously maintaining a high level of precision, and to increase the obtainable regulation speed. To this end, the phase difference is detected b y means of a phase comparator.
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