快速倾斜镜校正系统在天文仪器中的应用研究

发布时间：2018-03-08 21:29

本文选题：大气扰动　切入点：望远镜　出处：《天文学报》2016年03期 　论文类型：期刊论文

【摘要】：在天文望远镜系统中,通过在望远镜内部增加一套图像跟踪、校正系统,降低大气湍流低频扰动和望远镜跟踪误差对天文观测产生的影响,从而保证光路稳定,提高系统通光量和观测效率.系统工作时由CCD相机将星象的图像信号发送给控制计算机,控制计算机通过软件算法计算出实时图像与参考图像中的星斑中心偏移量,并反馈给快速倾斜镜控制器,从而控制倾斜镜快速摆动,实现光学校正过程.该系统目前已运行在国家天文台2.16 m望远镜中,实际运行的测试数据表明,在曝光25 ms情况下,校正平均频率为15Hz,系统基本可以消除望远镜跟踪误差的影响,大气湍流的扰动影响有一定改善,观测效率提高了约15%.
[Abstract]:In the astronomical telescope system, by adding a set of image tracking and correcting system inside the telescope, the influence of atmospheric turbulence low frequency disturbance and telescope tracking error on astronomical observation is reduced, so as to ensure the stability of the optical path. When the system is working, the CCD camera transmits the image signal of the star image to the control computer, and the computer calculates the deviation of the spot center between the real time image and the reference image by the software algorithm. The system is fed back to the fast tilting mirror controller to control the rapid swinging of the tilting mirror and realize the optical correction process. The system has been running in the 2.16m telescope of the National Observatory at present. The actual test data show that under the condition of 25 Ms exposure, The average frequency of correction is 15Hz. The system can basically eliminate the influence of telescope tracking error. The disturbance effect of atmospheric turbulence is improved to some extent and the observation efficiency is improved by about 15Hz.
【作者单位】：中国科学院国家天文台/南京天文光学技术研究所;中国科学院天文光学技术重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(11273038)资助
【分类号】：P111.2

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