基于数字全息技术的迈克尔逊干涉仪设计与应用

潘云; 潘卫清

doi:doi:10.5768/jao201839.0103003

应用光学, 2018, 39 (1): 93, 网络出版: 2018-03-15

基于数字全息技术的迈克尔逊干涉仪设计与应用

Design and application of Michelson interferometer based on digital holography

论文大纲

潘云 ¹潘卫清 ²

作者单位

¹ 南京航空航天大学金城学院实验中心，江苏南京 211156

² 浙江科技学院理学院，浙江杭州 310023

摘要

传统的迈克尔逊干涉仪只能简单地呈现光的干涉图像，并不能生动体现光的波动特性及其形貌特征，且测量过程繁琐。针对这些问题，提出了一种基于数字全息技术的新型迈克尔逊干涉仪实验装置。该装置采用2个CCD相机代替传统迈克尔逊干涉仪中的平面反射镜，并引入与球面光相干的平面参考光与球面光发生干涉，利用数字全息技术直接获取2个CCD记录面上的球面光复振幅信息，然后通过最小二乘拟合获取球面波参数，并对球面光复振幅进行解调得到居中后的球面光复振幅，最后通过数字干涉的方法实现两球面光的干涉。实验结果表明，该装置能实时生动地显示入射球面光的三维图像和两球面光的干涉图像，同时根据拟合得到的参数能便捷地测量透明等厚介质的折射率，实验中测量了3种不同材料的折射率，其误差均能控制在±5%以内，有较高的测量精度。

Abstract

The traditional Michelson interferometer can only simply present the interference image of light, and can not vividly reflect the fluctuation and morphological characteristics of light.Moreover, the measurement process is tedious.Aiming at these problems, a novel Michelson interferometer experimental device based on digital holography technology was presented.Instead of the plane mirrors of the traditional Michelson interferometer, two charge coupled-device (CCD) cameras were used to record the interference fields, which were generated by the interference of the spherical light and the planar reference light.Then the complex amplitude information of spherical light on the CCD recording plane was obtained directly by using the digital holography, and the least square fitting was utilized to compute the spherical parameters, the complex amplitude of spherical light was demodulated to obtain the centering complex amplitude.Finally, the interference phenomenon of two spherical lights was realized by digital interferometry.Experiment results show that the device can vividly display the 3D image of the incident spherical light and the interference image of two spherical lights in real time.In addition, according to the fitting parameters, the refractive index of transparent equal thickness medium can be measured conveniently.The refractivity of 3 kinds of materials measured by experiments show that the error can be controlled within ±5% and the measurement accuracy is high.

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潘云, 潘卫清. 基于数字全息技术的迈克尔逊干涉仪设计与应用[J]. 应用光学, 2018, 39(1): 93. Pan Yun, Pan Weiqing. Design and application of Michelson interferometer based on digital holography[J]. Journal of Applied Optics, 2018, 39(1): 93.

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