Ovryn B, Manley M T, Stern L S
Ann Biomed Eng. 1987;15(1):67-78. doi: 10.1007/BF02364168.
Double-exposure holographic interferometry is a contactless whole-field method. Dimensional changes are visualized as a series of interference fringes overlaid on the holographic image of the femur, where each fringe represents 0.316 micron (half the wavelength of the laser light) of motion. Interferograms for intact femora and for femora with identical geometry prostheses were produced. We have shown that the femur bends as a beam under axial load. The position of maximum deflection is a function of the properties of the composite structure. Under a known load the amount of deflection can be calculated and the effect of the prosthesis's modulus can be ascertained. In addition to bending, rotational effects can be perceived. Although data interpretation is complex and holographic production is costly and time-consuming, the technique holds promise for biomechanical applications as well as other biomedical disciplines.
双曝光全息干涉测量法是一种非接触式全场测量方法。尺寸变化表现为叠加在股骨全息图像上的一系列干涉条纹，其中每条条纹代表0.316微米（激光波长的一半）的位移。生成了完整股骨以及具有相同几何形状假体的股骨的干涉图。我们已经表明，股骨在轴向载荷下像梁一样弯曲。最大挠度的位置是复合结构特性的函数。在已知载荷下，可以计算出挠度的大小，并确定假体模量的影响。除了弯曲，还能察觉到旋转效应。尽管数据解释复杂，且全息图制作成本高、耗时，但该技术在生物力学应用以及其他生物医学学科中具有广阔前景。
