中文摘要：

介绍了光笔式三维坐标视觉测量系统的工作原理，由于系统具有冗余特性，可以实现系统的自标定。重点研究了光笔结构参数的自标定原理，建立了正确的自标定模型，综合运用各种数值算法对自标定模型进行了计算机仿真。仿真结果表明，点光源三维坐标的测量误差对光笔结构参数自标定结果的影响很大。因此，在光笔结构参数自标定过程中，需要保证光笔上点光源三维坐标的测量精度。

英文摘要：

A 3-D coordinates vision measuring system using a light-pen is presented. As the system is of redundancy characteristic,self-calibration can be realized. The principle of the light-pen＇s structure parameters self-calibration is discussed, and the correct self-calibration model is established. The results of computer simulation for the model are obtained with several iterative nonlinear algorithms synthetically,and show that the error of the accuracy the point-shaped light sources＇3-D coordinates on the light-pen has a great effect on the of self-calibration. Consequently, the point-shaped light sources＇ 3-D coordinates must be measured accurately enough to ensure the accuracy of the self-calibration.