Laser beam transmission and reception device - regulates feedback power using measured intensity of reflected beam

摘要

A laser beam is directed onto a spaced target (2) which has a retroreflector (9). A photodetector (11) for the reflected laser beam (10) is positioned adjacent the laser transmitter (20), the measured intensity of the reflected laser beam being used to regulate the power of the laser transmitter. Pref., the feedback regulation circuit (5, 6, 7) incorporates limitation of the max. transmitter power level. USE - Ranging, position measurement or bidirectional information transmission.