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本文叙述了脉冲光热偏转方法测量介质的光学吸收系数的基本原理和理论依据。实验测量了几种不同浓度的ＫＭｎＯ４溶液在５３２ｎｍ波长的光学吸收系数并与分光光度法测量值直接比较，两者完全符合。实验还测量了６３２．８ｎｍ波长滤光片在５３２ｎｍ波长的光学吸收系数。
This paper describes the basic principle and theoretical basis of the optical absorption coefficient of pulsed light thermal deflection method. The optical absorption coefficients of several different concentrations of KMnO4 solution at 532 nm were measured experimentally and compared directly with the spectrophotometric measurements, which were in good agreement with each other. The experiment also measured the optical absorption coefficient of the 632.8nm wavelength filter at 532nm wavelength.