利用倾斜镜技术实现2.4m望远镜的高精度跟踪Ⅰ:原理样机设计及测试
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摘要
为了获得更高质量的观测数据,提高望远镜的工作效率,设计了一套基于倾斜镜校正系统的原理样机,用于提高丽江2.4m望远镜的闭环跟踪精度。介绍了原理样机的研制,并在2.4 m望远镜上进行了实际测试。结果表明:该系统能实现245Hz的校正频率,望远镜的闭环跟踪精度提高了7.3倍,其高色散光谱仪的星光耦合效率提高了28.6%,快速测光系统的成像质量得到了明显改善;利用该系统可以满足对天文观测的要求。
A prototype based on the tip-tilt mirror correction system is designed to obtain higher quality observationdata and improve the efficiency of the telescope,which is used for the research on improving closed-loop tracking precision of the 2.4-meter telescope in Lijiang.This paper introduces the development of the prototype and carried out the actual test in the 2.4-meter telescope.The results show that the system can realize the correction frequency of 245 Hz,and the closed-loop tracking precision of the telescope is improved by 7.3 times.Meanwhile,the coupling efficiency of the high resolution echelle spectrograph is improved by 28.6%,the imaging quality of the fast photometry system is improved obviously.The system can meet the requirements of astronomical observation.
A prototype based on the tip-tilt mirror correction system is designed to obtain higher quality observationdata and improve the efficiency of the telescope,which is used for the research on improving closed-loop tracking precision of the 2.4-meter telescope in Lijiang.This paper introduces the development of the prototype and carried out the actual test in the 2.4-meter telescope.The results show that the system can realize the correction frequency of 245 Hz,and the closed-loop tracking precision of the telescope is improved by 7.3 times.Meanwhile,the coupling efficiency of the high resolution echelle spectrograph is improved by 28.6%,the imaging quality of the fast photometry system is improved obviously.The system can meet the requirements of astronomical observation.
引文
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[18]Chang L,Hu Z W,Xian H,et al.The report on the high resolution spectrometer of the 1.8-meter telescope[R].Beijing:[s.n.],2015:1-26.常亮,胡中文,鲜浩,等.1.8米望远镜高分辨光谱仪工作汇报[R].北京:[s.n.],2015:1-26.
[2]Li J W,Chen W B.Bandwidth of adaptive optics system in satellite-ground coherent laser communication[J].Chinese Journal of Lasers,2016,43(8):0806003.李佳蔚,陈卫标.星地相干光通信中的自适应光学系统带宽研究[J].中国激光,2016,43(8):0806003.
[3]Takami H,Takato N,Hayano Y,et al.Performance of Subaru Cassegrain adaptive optics system[J].Publications of the Astronomical Society of Japan,2004,56(1):225-234.
[4]Wizinowich P L,le Mignant D,Bouchez A H,et al.The WM Keck Observatory laser guide star adaptive optics system:overview[J].Publications of the Astronomical Society of the Pacific,2006,118(840):310-318.
[5]Rousset G,Lacombe F,Puget P,et al.NAOS,the first AO system of the VLT:on-sky performance[J].Astronomical Telescopes and Instrumentation,2003,4839(2):140-149.
[6]Rao C H,Jiang W H,Zhang Y D,et al.Progress on the 127-element adaptive optical system for 1.8m telescope[J].Proceedings of SPIE,2008,7654(2):70155.
[7]Wei K,Zhang X,Xian H,et al.First light on the127-element adaptive optical system for 1.8-m telescope[J].Chinese Optics Letters,2010,8(11):1019-1021.
[8]Close L M,McCarthy D W.High resolution imaging with a tip-tilt Cassegrain secondary[J].Publications of the Astronomical Society of the Pacific,1994,106(695):77-86.
[9]Glindemann A,McCaughrean M J,Hippler S,et al.CHARM-A tip-tilt tertiary system for the Calar Alto3.5mtelescope[J].Publications of the Astronomical Society of the Pacific,1997,109(736):688-696.
[10]Gao P F,Hu Z W,Dai S X.Study on the application of fast-steering mirror in astronomical instruments[J].Acta Astronomica Sinica,2016,57(3):336-343.高鹏飞,胡中文,戴松新.快速倾斜镜校正系统在天文仪器中的应用研究[J].天文学报,2016,57(3):336-343.
[11]Zhang L Y,Pi Q F,Han X L,et al.Chromospheric activity on late-type star DM UMa using highresolution spectroscopic observations[J].Monthly Notices of the Royal Astronomical Society,2016,459(1):854-862.
[12]Pi Q F,Zhang L Y,Chang L,et al.Chromospheric activity on the late-type star V1355Ori using Lijiang1.8-m and 2.4-m telescopes[J].Research in Astronomy and Astrophysics,2016,16(10):153.
[13]Xing L F,Chang L.Lithium abundance of 17young nearby stars:high resolution spectrograph observation by Lijiang 1.8m telescope[J].Spectroscopy and Spectral Analysis,2017,37(12):3900-3903.邢丽峰,常亮.近太阳17颗年轻恒星锂丰度:丽江1.8m望远镜高色散光谱观测[J].光谱学与光谱分析,2017,37(12):3900-3903.
[14]Sourth Astronomical Observatory.The annual report of Lijiang observatory(2008—2015)[R].南方天文观测基地.丽江天文观测站年报(2008—2015)[R].
[15]Sourth Astronomical Observatory.The annual report of Lijiang observatory(2015—2016)[R].南方天文观测基地.丽江天文观测站年报(2015—2016)[R].
[16]Fan Y F,Bai J M,Zhang J J,et al.Rapid instrument exchanging system for the Cassegrain focus of the Lijiang 2.4-m telescope[J].Research in Astronomy and Astrophysics,2015,15(6):918-928.
[17]Shi Y P,Liu C L.Positioning accuracy improvement of spot centroid for Shack-Hartmann wavefront sensor[J].Laser&Optoelectronics Progress,2017,54(8):081201.师亚萍,刘缠牢.提高夏克-哈特曼波前传感器光斑质心的定位精度[J].激光与光电子学进展,2017,54(8):081201.
[18]Chang L,Hu Z W,Xian H,et al.The report on the high resolution spectrometer of the 1.8-meter telescope[R].Beijing:[s.n.],2015:1-26.常亮,胡中文,鲜浩,等.1.8米望远镜高分辨光谱仪工作汇报[R].北京:[s.n.],2015:1-26.