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对ＣＣＤ你感器位置测量的潜在能力进行了分析，建立了光电信号模型，并导出了位置测量的极限精度公式，分析了影响位置测量精度的因素．对两种常用的光信号分布的一线情况进行了详细的讨论．
The potential of CCD sensor position measurement is analyzed, the photoelectric signal model is established, and the limit precision formula of position measurement is deduced. The factors affecting the position measurement accuracy are analyzed. The first-line situations of two commonly used optical signal distributions are discussed in detail.