Sun Tengfei, Zhuo Zhuang, Zhang Wenhao, Lu Peng, Lu Jingqi
Appl Opt. 2019 May 1;58(13):3459-3466. doi: 10.1364/AO.58.003459.
By using a kind of simple Michelson-type lateral shearing interferometry, in this paper, the precise quantitative phase measurement of transparent microscopic objects is realized successfully. For this interferometry, on the basis of the fundamental structure of the traditional Michelson interferometer, the two plane mirrors are replaced with two ordinary right-angle prisms. In the beginning, the ridges of the two right-angle prisms are set to align with the optical axis and be in the vertical direction. Subsequently, to achieve the lateral shear, one of these two right-angle prisms is rotated around its ridge. Furthermore, the goal to obtain more lateral shear can be achieved by introducing a bigger rotating angle or rotating another prism simultaneously. In addition, owing to the simple structure of the Michelson interferometer and the inexpensive optical components used, the system is compact, portable, easy to operate, and low cost. The experimental results show the practicability of this system.
本文通过使用一种简单的迈克尔逊型横向剪切干涉测量法，成功实现了对透明微观物体的精确定量相位测量。对于这种干涉测量法，在传统迈克尔逊干涉仪基本结构的基础上，将两块平面反射镜替换为两块普通直角棱镜。起初，将这两块直角棱镜的棱脊设置为与光轴对齐并处于垂直方向。随后，为实现横向剪切，将这两块直角棱镜中的一块绕其棱脊旋转。此外，通过引入更大的旋转角度或同时旋转另一块棱镜，可以实现获得更大横向剪切的目标。另外，由于迈克尔逊干涉仪结构简单且使用的光学元件价格低廉，该系统紧凑、便携、易于操作且成本低。实验结果表明了该系统的实用性。
