STATION FOR DETECTING AND LOCATING THROUGH LASER BEAMS AN OBJECT OR A SUBSTANCE LIKELY TO DIFFUSE BACK AT LEAST ONE PART OF THE INCIDENT LASER RAY AND SYSTEM FOR SENSING A SUBSTANCE SUCH AS SMOKE IN PARTICULAR OF A FIRE SUCH AS A FOREST FIRE

摘要

A station for locating through laser rays an object likely to difffuse back a part of the incident laser ray, wherein the optical emitter and receiver devices consist of one single device comprising, in the direction of emission, a device for separating the emitted and retrodiffused rays, an optical device converting the emitted parallel beam of small diameter into a divergent beam and a telescope adapted to collimate the divergent beam received from the optical device into a parallel beam of larger diameter, the retrodiffused beam traveling that path in the direction reverse from the emitted beam, the invention being usable for detecting in particular forest fire smokes.