| 摘要 |
A laser range finder measures the range between itself and another laser range finder by propagating a laser beam only in one way therebetween. A laser unit generates a short-pulse laser beam to be transmitted to the other laser range finder. A photodetector receives a short-pulse laser beam transmitted from the other laser range finder and detects the direction of the other laser range finder. A pointing unit adjusts the direction in which the laser beam generated by the laser unit is to be transmitted, into alignment with the direction of the other laser range finder which is detected by the photodetector. A controller stores in advance a holding time after the other laser range finder receives the short-pulse laser until the other laser range finder transmits the short-pulse laser, and calculates the range between the own laser range finder and the other laser range finder from the time at which the short-pulse laser beam is transmitted, the time at which the short-pulse laser beam is received, and the holding time.
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