| 摘要 |
PROBLEM TO BE SOLVED: To provide a scanning range finder capable of high-precision distance measurement over 360 degrees thereabout without leaving a blind spot in a space to be measured. SOLUTION: A scanning range finder includes: a scanning section 4 for moving, over a space to be measured, pulsed measuring light outputted from a light-casting section 3; and a light-receiving section 5 for detecting light reflected from a measuring object. The scanning range finder measures the distance from the measuring object in accordance with the reflected light detected by the light-receiving section 5. The scanning range finder further includes: a reference optical path having an optical fiber 6 that guides a part of the measuring light as reference light to the light-receiving section 5 for a predetermined optical path length; and a computing section for calculating the distance from the measuring object in accordance with a time difference in detection between the reference light and the reflected light that are detected by the light-receiving section 5 in synchronization with the timing of output of the measuring light. The light intensity of the reference light is adjusted in advance so that the reference light detected by the light-receiving section has a maximum signal level of not more than a predetermined first threshold, so that the reference light can be distinguished from the reflected light. COPYRIGHT: (C)2008,JPO&INPIT
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