| 摘要 |
<p>The invention provides a system which functions with laser radiation on the basis of the FM-CW principle and with which it is possible to measure the velocities of, or the distances from, all the objects in a 3-dimensional target region simultaneously without the laser beam transmitted having to perform any scanning movement over the said region. For this purpose, the system transmits a conical beam of laser radiation having a periodically varying intensity, laser radiation reflected from the target region being imaged by an optical system on the cathode of an image intensifier tube. The image formed on the anode of said tube after synchronous demodulation is converted image point by image point into separate electrical signals, the frequency spectrum of each of which is determined to obtain the required distance or velocity information.</p> |
