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建立在物理光学基础上的云纹干涉法,灵敏度和精度可根据使用者需要调节,其灵敏度较传统云纹法提高几十倍到一百倍。但一般认为其测量元件——试件栅的制造过程复杂,成本高昂,实用于工程测量比较困难,在我国国内的应用更未见到发表。本文简明地阐述了云纹干涉法的基本原理,着重介绍了作者从我国具体条件出发所试验的几种试件栅的调制方法,其简易程度接近甚至超过有些普通云纹法栅板(低频栅板)的传统制造方法,成本低廉,是我国一般全息光弹试验室不同程度上能够完成的。本文还介绍了作者采用的一种栅线频率的测量方法。其精度较高,设备也是物理光学试验室的常用设备。因此,在我国应用和迅速推广云纹干涉法已有可能。
Based on the physical optics Moire interferometry, sensitivity and accuracy can be adjusted according to user needs, its sensitivity than the traditional moiré method to improve several times to one hundred times. However, it is generally believed that the manufacturing process of the measuring element-test piece grid is complicated and costly, which is more difficult to apply to engineering measurement. The application in our country has not been published yet. This paper briefly describes the basic principle of Moiré interferometry and emphatically introduces the modulation methods of several kinds of sample grids tested by our author from the specific conditions in our country. The simplicity is close to or even surpass that of some common Moiré grids Plate) of traditional manufacturing methods, low cost, is China’s general holographic photoelastic laboratory to varying degrees can be done. This article also describes a method of measuring the raster frequency used by the author. Its high accuracy, the device is also commonly used physical optics laboratory equipment. Therefore, it is possible to apply and promptly promote moire interferometry in our country.