Løkberg O J, Slettemoen G A
Appl Opt. 1981 Aug 1;20(15):2630-4. doi: 10.1364/AO.20.002630.
Using the image waves from two similar objects as, respectively, object wave and reference wave in an electronic speckle pattern interferometer (ESPI) setup, it is possible to obtain interference patterns that indicate the amount of relative displacement between the two objects. Experimental results demonstrating direct interferometric subtraction and addition of vibration patterns are presented. Possible applications of the technique are also discussed.
在电子散斑图案干涉仪（ESPI）装置中，将来自两个相似物体的图像波分别用作物波和参考波，可以获得指示两个物体之间相对位移量的干涉图案。本文展示了直接干涉相减和相加振动图案的实验结果。还讨论了该技术的可能应用。
