| 摘要 |
Three sights are formed by laser emitter (10) and receiver (5, 6) systems, disposed so as to be coaxial, the photodiode receiver (5) being associated with means for the amplification and electronic processing (7) of a signal consisting of sudden variation of the capacities to reflect the emitted beam; and the circuits for supplying (20) the laser emitters form emissions of laser signals of duration which is relatively very short in comparison with the interval between two successive emissions. (Fig. 1) |
