云台红外太阳望远镜中光电导行系统的像场旋转

The Image Field Rotation of the Auto-Guide Unit of the Solar Telescope in Yunnan Observatory

红外太阳望远镜中的光电导行系统是高精度的反馈跟踪系统。在开环控制下,难以实现太阳望远镜的跟踪指标,所以必须使用光电导行作为目标位置反馈系统。但是在地平式系统跟踪过程中,光电导行望远镜中的像场会旋转,如果不进行消旋,光电导行系统就不能工作,这就需要解决光电导行系统中的像场旋转。本文在理论上分析了红外望远镜中光电导行系统的像场旋转,并给出了像在CCD面上的运动变化公式。

The Auto Guide Unit of the solar telescope is a feedback track system with high precision.Under the open loop control,it is difficult to reach tracking demand of the solar telescope;therefore,it is necessary to use the autoguide unit as the feedback control system for the target position.In the process of tracking,there is an image rotation of the autoguide unit,and if the effect of the image rotation is not considered,it can disable the autoguide unit,therefore it s necessary to resolve the image rotation of the autoguide unit.In this paper,the analysis of image rotation about the autoguide unit of the solar telescope has been given theoretically,and the specific formula of the movement about the image in the CCD has been worked out.