测量红外光斑在物理上和技术上都有很重要的意义。本文介绍一种精确测量高斯光斑参数的调制盘方法,它能快速和精确的测量高斯光斑参数。假若光斑强度分布是高斯模式,当光斑扫过栅栏形调制盘时,测量频谱的峰值能精确知道高斯光斑的参数. Measurement of infrared spot in the physical and technical have very important significance. This article describes a modulation disk method that accurately measures Gaussian spot parameters, which enables Gaussian spot parameters to be measured quickly and accurately. If the spot intensity distribution is Gaussian, measuring the peak of the spectrum accurately knows the Gaussian spot parameters as the spot sweeps over the grid.