METHOD FOR DETERMINING SPATIAL POINT COORDINATES, APPLICATION OF THIS METHOD TO HIGH PRECISION TOPOGRAPHY, SYSTEM AND OPTICAL DEVICE FOR IMPLEMENTING SAID METHOD.

摘要

P Elements of an optical apparatus are placed at the points (A) whose spatial coordinates are measured. This optical apparatus comprises, on the one hand, an optical device, for example embedded in an aircraft (2), and, on the other hand, reflectors (10), for example cube-corner type reflectors. The optical device comprises a laser source operating in pulses and a detector sensitive to radiation from said laser source. The desired spatial coordinates are determined from measurements of flight time of reflected laser pulses. BR/ The pulses (8) emitted by the laser source are diverge to widen their angular field of view and the radiation reflected by the reflectors (10) is collected in wide field to transmit it to said detector. BR/ Use in particular in high precision topography to analyze ground subsidence. / P