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Application progress of stressed mirror continuous polishing technology in the segments fabrication of telescope primary mirror
Jiang ZB(姜自波); Li XN(李新南); Chen Z(陈哲); Cao T(曹亭); Chen KX(陈昆新); Wang FP(王丰璞); Gong XF(宫雪非); Liang YJ(梁永军); Zheng Y(郑奕); Jiao XJ(焦晓洁)
2020-12
会议名称SPIE ASTRONOMICAL TELESCOPES + INSTRUMENTATION
会议录名称Proc. of SPIE Vol. 11451
会议日期2020-12-13
会议地点California, United States
摘要
The primary mirrors of several large ground-based astronomical telescopes currently in the research or planning phases, such as TMT (Thirty Meter Telescope), ELT(Extremely Large Telescope) and LOT (Large Optical /infrared Telescope), take the form of a segmented array telescope. The fabrication of hundreds of off-axis aspheric segments is one of the key technologies for their development. Our proposed stressed mirror continuous polishing (SMCP) method combines the stressed mirror polishing (SMP) and continuous polishing (CP) technologies. The combined technologies deliver high-quality surface smoothness of the SMP technique with the high efficiency of continuous polishing. Nanjing Institute of Astronomical Optics & Technology (NIAOT) and TMT have carried out in-depth cooperation in the segment fabrication of the primary mirror. NIAOT is currently working on the development of off-axis aspheric segments. In this article, the progress for the 5m continuous polishing machine and ancillary equipment, the stress loading test on a 1.52 meter segment, the calibration of our 2-dimensional contact-metrology device and the reference mirror calibration are introduced here in detail.
关键词Stressed Mirror Polishing Continuous Polishing Segments Mirror Fabrication Off-axis Aspheric Contact Measurement
学科领域天文技术与方法
语种英语
文献类型会议论文
条目标识符http://ir.niaot.ac.cn/handle/114a32/1778
专题会议论文
作者单位南京天文光学技术研究所
推荐引用方式
GB/T 7714
Jiang ZB,Li XN,Chen Z,et al. Application progress of stressed mirror continuous polishing technology in the segments fabrication of telescope primary mirror[C],2020.
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