二维四边形位置敏感探测器实验研究

Experiment on two dimensional quadrilateral position sensing detector

位置敏感探测器(PSD)是一种可以探测光斑重心位置的光学传感器,具有响应速度快、位置分辨率高和处理电路简单等优点,在角度测量、位置检测等精密测量系统中具有广泛的应用。介绍了在实验室内光学平台上搭建光路,选用A823数据采集卡,并在DOS操作系统Borland C++builder环境下编写C程序连续实时采集模拟电压信号,实现AD转换,计算光斑位置坐标并进行误差分析。实验选用瑞典SiTek公司型号为2L10_SU65_SPC02的四边形位置敏感探测器,通过误差分析得出主要结论,包括PSD存在边缘效应,室内实验影响传感器位置坐标的主要因素是自然光和日光灯,去除影响因素后精度明显提高。

Position sensing detector（PSD） is an optics sensor that can detect the center of the incident light.It has the advantages of fast response,high position resolution and simple circuit,these characteristics make it a wide range of application in precision measurement such as angle and position detection.A optical experiment on a optic bench A823 was chose for data acquisition under the DOS operating system and Borland C ＋＋ builder,C program was written for a real-time transformation between analog voltage and digital voltage,then position coordinate was calculated and the error was analyzed.2L10_SU65_SPC02 PSD used in this experiment is from Sitek corporation in Sweden,through the error analysis the main conclusions include fringe effect of PSD,the main influence about the position error are natural daylight and fluorescent light.If eliminate influence factor precision will improve a lot.