Fabry-Perot型告警器入射激光角度的测量

分析了Fabry-Perot型激光告警器的工作原理,讨论了F-P标准具摆动角、入射激光角度与折射角三者之间的关系,设计了计算来袭激光入射角度的方法.以波长为1.064 μm的激光为例,针对4种不同的入射角,对透射光强随摆动角的变化情况进行了模拟计算.利用处理软件,对4种来袭激光入射角度进行了模拟测量,结果表明,能够较精确地测量出来袭激光的入射角度.

Incident angle measure in laser warning device based on Fabry-Perot etalon

Principle of operation was analyzed for laser warning device based on Fabry-perot etalon, the relations were deduced among swinging angle of F-P etalon, laser incident angle and refraction angle. The method was achieved to calculate laser incident angle. Take laser of 1. 064um wavelengh for example, the changing relations between transmission light intensity and swinging angle were calculated at 4 different incidence angle. Four different laser incident angles were measured by processing software. The results show that the method is valid in measuring laser incident angle.