Rangefinder apparatus adjusting method

A rangefinder apparatus adjusting method for adjusting a rangefinder apparatus comprising:

• light-projecting means for projecting a luminous flux toward an object at a distance to be measured;
• light-detecting means for detecting reflected light of the luminous flux projected toward the object at a light-detecting position on a position sensitive detector corresponding to the distance to the object, and outputting a signal corresponding to the light-detecting position;
• arithmetic means for carrying out an arithmetic operation according to the signal output from said light-detecting means, and outputting an output ratio signal corresponding to the distance to the object;
• integrating means, having an integrating capacitor, for discharging and charging said integrating capacitor according to the output ratio signal, for accumulating and integrating the output ratio signal and outputting an integrated signal corresponding to integration of the output ratio signal;
• adjusting means for adjusting a period of each accumulating operation and the number of accumulating operations in said integrating means such that an integration time in said integrating means becomes substantially constant;
• and
• detecting means for detecting the distance to the object in conformity with a converting expression according to the integrated signal output from said integrating means said method comprising determining the converting expression by alternately carrying out distance measuring operations in respective accumulating operations having respective periods, different from each other, adjusted by said adjusting means.