本文介绍了一种适用于火焰、流体、等离子体、光纤棒等透明介质的无损诊断技术──光学层面分析（optical tomography）．这一诊断技术是利用激光和计算机技术对透明介质的某一层面进行积分测量，然后建立起该层面的折射率、温度、密度等特性的二维或三维图象．文章介绍了光学层面分析重构图象的原理和三种测量方法及其对应的计算公式，并讨论了这一方法的前景． This article describes a non-destructive diagnostic technique for transparent media such as flame, fluid, plasma, fiber optic rods, and the like-optical tomography. The diagnostic technique is the use of laser and computer technology to measure a layer of transparent media integral measurement, and then create the level of refractive index, temperature, density and other characteristics of two-dimensional or three-dimensional images. This paper introduces the principles and three measurement methods of reconstructed image by optical plane analysis and their corresponding formulas, and discusses the prospect of this method.