对 L AMOST光纤定位系统光纤定位单元提出了单元定位精度非接触检测的装置。检测装置采用面阵CCD传感器 ,通过检测光纤端部出射光斑的特征点以表征定位单元上光纤端部位置。检测算法采用灰度加权平均法 ,可以达到亚像素级的检测精度。介绍了提高检测精度的主要措施 ,装置选用白光照明 ,对所采集的图像采用多次平均的方法 ,提高了装置的稳定性。 Aiming at the L AMOST optical fiber positioning unit fiber positioning unit, the unit positioning accuracy non-contact detection device is proposed. The detection device uses an area array CCD sensor to characterize the position of the fiber end on the positioning unit by detecting the feature points of the exiting light spot at the end of the fiber. Detection algorithm using gray weighted average method, you can achieve sub-pixel-level detection accuracy. The main measures to improve the detection accuracy are introduced. The device uses white light illumination, and uses the average of the collected images multiple times to improve the stability of the device.