本发明所涉及的激光测距仪为:通过预定的距离变化来探寻目标并在所选定的距离范围内锁定目标的距离。为了更好地理解本发明,将以一个如附图所示例子来说明: 图1为测距仪的光学布置图; 图2是测距仪电子线路的方框图! 图3是电路有关波形的时序图; 图4、图5和图6是图2中有关部分的较详细的图。如图1所示,砷化镓激光器4的光束,通过可移动的聚焦透镜5和物镜6射向目标。从 The laser range finder according to the present invention searches for a target by a predetermined distance change and locks the target distance within a selected distance range. For a better understanding of the invention, there will be illustrated by way of example the figures of the accompanying drawings in which: Fig. 1 is an optical arrangement of a range finder; Fig. 2 is a block diagram of a range finder electronic circuit; FIG. 4, FIG. 5 and FIG. 6 are more detailed diagrams of relevant parts of FIG. 2. As shown in FIG. 1, the light beam of the gallium arsenide laser 4 is directed to a target through a movable focus lens 5 and an objective lens 6. From