This paper proposes an optical amplification method of measuring the minute displacement of a laser beam. The relationship between the displacement of the incident laser beam and the reflective beam is calculated by geometric optical analysis. The equation of displacement is derived to calculate its magnification. We demonstrate that by employing the reflection characteristics of a cylindrical mirror, the minute-displacement of a laser beam can be enlarged to the millimetre level. Experimental results confirm that the magnification can be hundreds of times. Such an enlarged displacement measuring system of laser beam could be suitable for the study of Goos–Hänchen shift.

中文翻译：

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用于测量激光束微小位移的光学放大

本文提出了一种测量激光束微小位移的光学放大方法。通过几何光学分析计算入射激光束和反射光束的位移之间的关系。推导出位移方程来计算其放大倍数。我们证明了通过利用柱面镜的反射特性，可以将激光束的微小位移扩大到毫米级。实验结果证实，放大倍数可达数百倍。这种放大的激光束位移测量系统可适用于 Goos-Hänchen 位移的研究。