为实现展开式拼接望远镜粗共焦共位相的调整, 本文采用三块子镜拼接的方式进行主镜面形的调整。首先由步进电机和直线电机实现宏动范围 (微米量级)内动态子镜的展开, 然后由压电促动器进行微动范围 (纳米量级)的调整。由三组压电促动器构成的三自由度调整平台可实现对子镜倾斜误差和活塞误差的精密调整。经试验验证, 三自由度调整平台对反射镜调整后的误差小于 0.5″；利用 ZYGO干涉仪对三子镜光学系统进行共焦检测, 测试结果显示三块子镜达到了共焦调整的目的。拼接式望远镜粗共焦共位相的调整为进一步面形误差补偿, 最终实现精共焦共位相提供了一定的技术基础。

In order to achieve the deployable and segmented telescope’s coarse co-phase of the focus, this paper will take three segment mirrors to adjust the primary mirror surface. Firstly, a stepper motor and a linear motor implement to deploy the dynamic mirror within macro scale, i.e. μm magnitude. Secondly, piezoelectric actuator achieves the micro adjustment, i.e. nm magnitude. A three-degree of freedom platform made of three piezoelectric actuators can precisely adjust the segment mirrors’ tilt error and piston error. The test result shows that the flat mirror’s surface error is less than 0.5″by the three-degree of freedom platform adjustment. Testing the three segment mirrors optical system by the ZYGO interferometer, the result showed that it realized the confocal adjustment. This method for the segmented telescope’s coarse co-phase of the focus adjustment can be used for further surface error compensation to achieve fine co-phase of the focus.