在将ＣＣＤ安置于ＣＣＤ相机焦面的过程中，需要确定相机光学系统的焦面位置（简称定焦）；由于定焦过程中采用了计算机技术，将人为因素的影响降至最低，而测试设备、测量环境等因素成为影响测量精度的主要误差来源。对此，应用误差理论，按误差的作用类型分别进行了分析 CCD CCD camera placed in the focal plane of the process, you need to determine the focal position of the camera optical system (referred to as fixed focus); as the focusing process using computer technology to minimize the impact of human factors, and test equipment , The measurement environment and other factors have become the main source of error affecting the measurement accuracy. In this regard, the application of error theory, according to the role of the type of error were analyzed