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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
Conference NameSPIE ASTRONOMICAL TELESCOPES + INSTRUMENTATION
Source PublicationProc. of SPIE Vol. 11451
Conference Date2020-12-13
Conference PlaceCalifornia, United States
Abstract
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.
KeywordStressed Mirror Polishing Continuous Polishing Segments Mirror Fabrication Off-axis Aspheric Contact Measurement
Subject Area天文技术与方法
Language英语
Document Type会议论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/1778
Collection中国科学院南京天文光学技术研究所_会议论文
大口径光学技术研究室_会议论文
Affiliation南京天文光学技术研究所
Recommended Citation
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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