【摘要】 用凹面反射镜和平面反射镜组成结构简单、光路易调的光多次反射装置 ,计算了这种光学系统的稳定性条件。考虑实际入射光束的直径和发散角 ,给出了最大反射次数的求法。制成适用于钛宝石激光光声光谱仪的光 56次通过的长程池。理论计算的反射光斑分布与实验观测一致。这个技术有利于提高光声光谱和吸收光谱的探测灵敏度。更多还原

【Abstract】 A multiple-pass geometry for simple structure and easy adjustment is designed ,which consists of only a concave mirror and a plane mirror. The stability condition of this optical system is worked out. A design procedure for maximum number of reflection is described that includes a consideration of input ray diameter and divergence angle. A 56-pass cell is constructed for Ti: sapphire ring laser photoacoustic spectrometer. The calculated spot pattern is in good agreement with the experimental observation. This technique is useful for photoacoustic spectroscopy and long path absorption.更多还原