Distance measuring device

摘要

A distance measuring device having a light projector and a light receptor, at least one of which is caused to move so that when the intersection of their optical paths is disposed at an object, its coincidence is detected by the signal generated in the light receptor for measuring the distance from the device to the object based on the triangulation. In order to obtain a clear peak signal, according to the invention, for the light source, use is made of a light energy distribution characteristic which is higher at the marginal zone than at the central zone.