基于手机光传感器精测空气折射率

Accurate measurement of air refractive index based on mobile phone light sensor

为解决迈克尔逊干涉仪测定空气折射率实验中因人眼观察条纹的变化数容易产生误读的问题,巧用智能手机的光传感器实时感应并记录干涉条纹中心位置的明暗变化,生成"亮度-时间"图像,通过数图像中波谷或波峰数目的方法精确得出干涉条纹的变化个数,从而精确地测出空气折射率。该方法不仅消除了实验者的视觉疲劳,而且使实验结果更加精准。

In order to solve the problem that the number of fringes observed by the human eyes is easily miscounted in the experiment of air refractive index measurement with Michelson interferometer.In this paper,a smart phone with optical sensor is proposed to detect the center point s intensity of the interference fringe,and record the real-time data to generate brightness time image.The number of changes in interference fringes can be accurately obtained by counting the number of the peaks or trough in the image.Then the air refractive index is accurately measured.This method not only eliminates the visual fatigue of the experimenter,but also makes the experimental result more accurate.