The error caused by the variation of environmental light is analyzed and digitally simulated in this paper, and a rectification algorithm to calibrate the grey scale of fringe pattern is introduced.

• 本文分析并数字模拟了由环境光变化引入的误差，提出一种现场检测环境光强变化并根据检测结果对获取的条纹图进行校正的方法。