为了更好地了解拼接望远镜光学系统的光学性能，对拼接主镜中分块镜的各种误差对望远镜光学系统的影响进行有效的分析计算。从几何光学入手，采用光线追迹方法，建立了拼接望远镜光学系统的数值仿真模型。利用该模型，可以模拟不同口径和分块镜数拼接望远镜的光学系统；可仿真分析拼接主镜中分块镜由于轴向平移、倾斜、旋转和径向平移等各种误差引起的波像差以及对远场图像的影响。并计算了不同误差项对光学系统斯特雷尔比的影响，为发展大口径望远镜提供技术支持。

In order to have a better understanding of the optical properties of segmented telescope system and conduct an effective analysis of the impacts of various errors induced by single segmented mirror of primary mirror, this article aims at builting a model of segmented telescope system from the perspective of geometry optical with optical raying tracing. This model enables to simulate the segmented telescope of different sizes, and can get the wavefront aberration and the far-field image of the segmented telescope with the piston error, tip-tilt and rotation error ect. Strehl ratio of segmented telescope with different errors is calculated. The work is expected to provide technological support for the further development of large diameter telescopes.