中文摘要：

YNST（云南1m太阳望远镜）光电导行系统的作用除了获取足够清晰的太阳像用作光电导行外，还参与望远镜光轴的校正。介绍了YNST光电导行镜的光学要求、机械设计结果及镜体设计所采用的被动无热化技术。校核了导行镜在阳光辐照下的热变形，计算了导行镜镜筒的最大弯沉，结果表明，所采用的无热化设计是有效的，导行镜刚度满足导行系统要求。

英文摘要：

The YNST （Yunnan one-meter Solar Telescope）auto-guiding system can not only obtain a solar image for guiding but also be used for correcting the primary optical axis of the YNST. This paper describes the optical requirements, mechanical design, and the passive-athermalization technique for the guiding telescope. We analyze the thermal deformation of the guiding telescope caused by solar radiation, and calculate its maximum deflection. The results show that the athermalization design is effective, and the guiding telescope is stiff enough to meet the requirements.