本文介绍了光切三维轮廓测量系统的原理和结构，并对其测量精度进行了详细的分析，得出了量化环节和旋转环节为测量的主要误差源的结论。最后，给出了本系统与三坐标测量机的测量结果比较和进一步提高精度的措施 In this paper, the principle and structure of the light-cut three-dimensional profile measurement system are introduced, and its measurement accuracy is analyzed in detail. The conclusion is that the quantization error and the rotation error are the main error sources. Finally, the measurement results of this system and CMM are compared and the measures to improve the accuracy are given