DISTANCE MEASURING EQUIPMENT FOR CONSTRUCTION WORK

摘要

PROBLEM TO BE SOLVED: To provide distance measuring equipment for construction work capable of correctly measuring distances even if the location of an image-forming point on an optical sensor detected when a light source is installed at infinity is not known. SOLUTION: A mirror 24 and a half mirror 25 for converting the direction of light of a light source 10, a point to be measured, condensed by a light condensing lens 22b are provided so as to receive the lights 21a and 21b of the light source 10 each condensed by the light condensing lenses 22a and 21b by the common optical sensor 23a. The locations of the image-forming points of the lights on the optical sensor 23a detected when each light passing through the optical axes of the light condensing lenses 22a and 22b are received by the optical sensor 23a are matched with each other by the mirror 24 and the half mirror 25. The distance measuring equipment for construction work is constituted so as to measure the distance L between a base point of measurement and the point to be measured on the basis of the phase difference (d) of the pair of image-forming points on the optical sensor 23a detected when the lights 21a and 21b of the light source 10, the point to be measured, are condensed by the light condensing lenses 22a and 22b.