| 摘要 |
PROBLEM TO BE SOLVED: To provide an accurate range finder by making it less susceptible to the effect of the weakening of reflected light or the like due to the measurement of a long distance in a range finder using measuring light. SOLUTION: Since the count number of light reception can be increased by increasing the emitting intensity of a measuring light emitting device corresponding to a distance or increasing the light receiving sensitivity of a reflected light receiver, the reflected light from an object to be measured can be clearly separated from noise light arriving at random even if the object to be measured is present at a near or remote place. Therefore, the accurate range finder can be provided. |
