| 摘要 |
PROBLEM TO BE SOLVED: To provide a light wave range finder capable of controlling power of a light emitting part without being affected by disturbance light.SOLUTION: The light wave range finder, which has a light receiving part for distance measurement and a light emitting part 12 for sending distance measuring light and reference light, comprises: a second light receiving part 201 arranged on an optical path not affected by disturbance light made incident to the distance measuring light, so as to receive light of the light emitting part 12; a received light output monitoring part 80 for monitoring output from the second light receiving part 201; and a light emission output adjusting part 90 for adjusting a light emission quantity of the light emitting part 12 based on monitoring by the output monitoring part so that the output from the second light receiving part 201 becomes a predetermined value. The light wave range finder adjusts the light emission quantity while blocking disturbance light.SELECTED DRAWING: Figure 2 |
