基于光纤像面全息的金属构件微位移测量

Measuring Micro-displacement of Metal Components Based on the Image-surface Holography of Optical Fiber

针对激光全息技术能处理常规方法难以解决的问题以及光纤具有环境适应性的特点,设计了一种基于光纤像面全息干涉计量对金属材料构件微小位移测量的方法.通过对不同芯径传像光纤束情况下的成像结果分析,得出了与材料力学相符合的结论.实验结果表明,提出的方案适用于对金属材料特性的高精度测量,可以解决阻碍激光全息技术推广应用和发展的环境要求.

Considering the environmental adaptability of optical fiber and unique advantage of laser holography, the laser image-surface holographic of optical fiber interferometric techniques for measuring micro-displacement of metal components is proposed. Imaging analysis of the different single fiber core diameter size of image-carrying optical fiber shows that the conclusion is consistent with theory of mechanics of materials. Moreover, experimental resuits indicate that the approach can be applied in high precision measurement of properties of metal. The results also demonstrate the potential of the fiber optical image-surface holographic in practical applications, and lay a foundation for further research.