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本文推导了光纤全息干涉双曝光法理论公式.公式表明:光纤全息干涉双曝光法是可行的,其再现干涉条纹的特点是叠加在模斑场的干涉条纹.对焊缝和复合材料板进行的光纤全息双曝光无损检测实验结果表明,物体变形前后的模斑干涉条纹很容易分辨,可清楚地看出缺陷的部位.说明光纤的引入对于全息干涉计量影响不大,能够进行高精度的无损检测.光纤全息干涉计量在危险、封闭系统中应用的关键性问题是如何加载问题.本文提出了一种有效的组合光纤式解决方法.
In this paper, the theoretical formula of holographic interference double exposure method is deduced.The formulas show that the fiber holographic interference double exposure method is feasible, and the characteristics of reconstructed interference fringes are the interference fringes superimposed on the mottle field. The experimental results of non-destructive optical fiber holographic double exposure show that the fringe interference fringes before and after the object deformation can be easily distinguished and the defects can be clearly seen, indicating that the introduction of optical fiber has little effect on the holographic interference metrology and can perform high-precision nondestructive testing The key problem of fiber holographic interferometry used in dangerous and closed systems is how to load the fiber.In this paper, we propose an effective combinational fiber solution.