A METHOD AND A SYSTEM FOR REDUCING THE DISTANCE-DEPENDENT AMPLIFICATION FACTOR WHEN MEASURING FLUID FLOW MOVEMENTS WITH AN IMAGE-PRODUCING LASER-DOPPLER TECHNIQUE

摘要

the invention relates to a method and a system for reducing the amplification factor based on the distance in the measurement of fluid flow by means of a technique using a laser doppler to obtain an image, in particular at the on the blood flow through the tissue.a laser beam source directs a laser beam (1) and (2) to a measurement object (5), which disperses and reflects the laser beam (2). the reflected light is received by a detector (9) detects the variation of frequency due to the doppler effect.means, preferably in the form of one or more lenses (12, 15, 16) are placed in the path of the beam (2) and is designed to maintain constant the number of areas of consistency on the detection surface of the detector and regardless of the distance between the detected on the subject of measurement.