中文摘要：

象限光电探测器是一个新类型位置检测器，它已经被用于象测量那样的许多地，追踪的目标，控制，激光描准，指导，等等。系统性能与象限光电探测器收到的激光点区域有关。仅仅当激光分散点的尺寸对察觉者均匀时，系统的线性输出信号被得到的最佳感光性的区域。测量察觉者收到的themini点并且在实时调整它的一个方法被介绍，它基于几何的象限和光结构，使用倾斜镜子扫描，察觉者的顺序产量信号被得到，因为特征变量，激光分散点的半径和分散的可调节的价值是计算的，然后，测量模型与信号变化的率被造。实验结果证明最大的错误是 0。在测量的 58 μ m 0 变化。5 公里± 0.1 公里。

英文摘要：

Quadrant photodetector is a new type position detector, which has already been applied to many fields such as measurement, target tracking, control, laser collimation, guidance, etc. System performance is related to laser spot area received by the quadrant photodetector. The optimum linear output signal of system is gotten only when the size of laser dispersion spot is well-proportioned to the detector photosensitive area. A method to measure the mini-spot received by detector and to adjust it in real time is presented, which is based on the quadrant geometrical and optical structure, making use of tilting mirror scanning, the sequence output signal of detector is gotten, then measurement model is built with rate of signal change as characteristic variable, the radius of the laser dispersion spot and adjustable value of dispersion are calculated. The experiment result shows that the maximum error is 0.58 μm in measurement range of 0.5 mm±0.1 mm.