摘要 |
<p>Distance measuring device comprising a first light emitting unit for projecting a pulsed laser beam, a second light emitting unit for emitting a correction pulsed laser beam, a distance measuring light optical path to guide the pulsed laser beam for distance measurement toward a first photodetection unit, an internal reference light optical path for splitting an internal reference pulsed light from the pulsed laser beam for distance measurement and for guiding to a second photodetection unit, a correction light optical path for splitting the correction pulsed laser beam and for guiding to the first photodetection unit and the second photodetection unit, light amount adjusting means for changing light intensity of the correction pulsed laser beam and the internal reference pulsed light, and control arithmetic unit for calculating a distance based on difference of photodetection time of the pulsed light from the first photodetection time and the second photodetection unit.</p> |