Apparatus for retro-reflecting the light beam with a triangular prism multiple

摘要

(57) [Abstract] The present invention relates to apparatus for retro-reflecting the light beam with a triangular prism. Triangular prism 6-10 having a light incident surface of the triangle (1,2,3,131,132,133) is are provided, each triangular prism of adjacent (1,2) is in contact with the side. Thus, continuous retroreflective high strength is obtained for an angle of 360 °. In particular, in the case of the use in the construction or geodetic surveying, the entire circumference of the reflector, gives the distance and angle measurement accuracy for high collimation direction of all. In this case, the matching operation for surveying instrument is not required. Distance measurement is a reliable and clearly in a short distance. Entire circumference reflector is particularly advantageous in automatic surveying. Regardless of the alignment, it is because the reflector is because it is followed automatically by the surveying instrument.