利用重心法求光斑信号位置的误差分析

在许多光电检测系统（如ＬＡＭＯＳＴ光纤定位标定系统）中，要求准确得到光斑信号的位置。光斑信号的位置可以由重心法求出。重心法在使用中，不可避免地要受到许多因素的干扰，给测量结果带来误差，如杂散光、气流、温度、暗电流、ＡＤ 采样的位数等等。通过实验对重心法运用于这类系统将产生的误差作了较为详尽的分析。实验表明：重心法具有精度高，计算简单，对硬件要求低等优点，完全适用于ＬＡＭＯＳＴ光纤定位标定系统。

Error analysis of the center of gravity method when used to get the position of a facula

Many photoelectric detecting systems need to get the position of a facula precisely, and the position can be worked out with center of gravity method. In the usage of center of gravity method, it inevitably will be affected by many factors, and results in error. The factors are light, air, temperature, the resolving power of AD and so on. A detailed analysis is made on the error result from factors mentioned above when using center of gravity method. The results of experiments indicated that the center of gravity method has the virtue of high precision, simple to calculate, and low demand on hardware. It can be applied to any photoelectric detecting system whose objective is to know the position of a facula precisely.