本文介绍了图像全息法在光弹性应力分析中的应用。实验和理论研究的结果都说明由氦 氖气体激光器发出的非偏振光是和圆偏振光等效的。用这个方法，可以通过补偿器测定等和 线分数条纹，可以消除条纹图案的视差和浮动，全息底板可以用白光照明再现干涉应力图 像。本文给出了用实验方法测定的汽轮机叶片根部和轴承瓦盖模型的应力分布。 This paper introduces the application of image holography in photoelastic stress analysis. The experimental and theoretical results show that non-polarized light emitted by a He-Ne laser is equivalent to circularly polarized light. In this method, the line-fraction fringes can be measured by a compensator to eliminate the parallax and floating of the fringe pattern, and the hologram substrate can reproduce the interference stress image with white light illumination. In this paper, the stress distribution of steam turbine blade root and bearing roof model determined by experimental method is given.