基于线阵CCD的迈克耳孙干涉仪条纹计数器

CCD linear fringe counter for Michelson interferometer

通过CCD图像传感器对光干涉信号进行捕捉与采集,并将捕捉信号送至ARM微控制器,利用芯片内部的A/D转换单元将模拟信号转换成数字信号,然后对数字信号进行分析、变换、测量处理,将干涉图像、干涉环变换方向及计数结果显示在液晶屏上,该方法消除了人工记录干涉圆环数目时因疲劳而产生的计数误差,提高了测量精度.

Using CCD image sensor to capture and collect the optical interference signal and on- chip A/D conversion module of ARM micro-controller to convert analog signals into digital signals, the interference fringes were digitized and analyzed. The interference pattern, the moving direction of interference rings and the counting numbers were displayed on a LCD screen. This method eliminated the error caused by manually recording the number of interference rings and improved the measure- ment accuracy.