用反射镜法测定激光束在大气中的衰减

Measurement of atmospheric extinction coefficients of laser beams by means of reflectet

测量激光束在大气中传播的衰减系数,可以利用安设在一定距离外的反射镜将激光束反射回发射地点以便于与发射光束比较。本文探讨了来用这种方法时的几何损失的计算;引进了“附加损失”的概念来处理光束偏离轴线的情况;并在590米的距离上对10.6μ激光束作了实地测量,获得了夏季晴朗天气下的典型衰减数值。

It is possible to employ a reflector positioned at a distance to measure the atmospheric extinction coefficients of laser beams. The reflector reflects the beam to the transmitting point where it is compared with the transmitted beam, In this paper, We invesetigate the geometric losses when employing this method and introduce the concept of ＂additional loss＂to deal with beam deviation from the axis. We have tested the method for a distance of 590 meters with 10.6u laser beam and abtatned typical data on fine days in summer.