| 摘要 |
<p>A measuring system comprises a light projecting unit 1 for projecting a distance measuring light, a distance measuring optical unit 2 for projecting the distance measuring light to an object to be measured and for receiving the reflected distance measuring light from the object to be measured, a photodetection unit 3 for receiving the reflected distance measuring light from the distance measuring optical unit, and a distance measuring circuit 4 for calculating a distance to the object to be measured based on a photodetection signal from the photodetection unit, wherein the light projecting unit comprises a mixing means 40 for mixing the distance measuring light, and the distance measuring optical unit comprises an optical path switching means 42 for switching over the distance measuring light to an outer optical path or to an inner reference optical path and for allowing the photodetection unit to receive the light, and a light amount adjusting means 41 for adjusting a light amount of the distance measuring light received by the photodetection unit, wherein at least one of the mixing means, the optical switching means, and the light amount adjusting means comprises a hollow type motors 56, 57 and 58 as a driving source, and a hollow of the motor is an optical path. <IMAGE></p> |
