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    MA submirrors manufactured by NIAOT were smoothly checked and accepted
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    Update time: 2006-12-31
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      On 27 December 2006,thirty MA submirrors manufactured by NIAOT were checked and accepted。Average value of RMS for these submirrors is 12.45nm(between 8.02--18.01nm),which is better than requirement of contract。

      Two important achievement were obtained:

    1):non-round super thin mirror technology with large aperture and high accuracy by loop polishing machine has been firstly mastered in China

    2):testing system which adopt active supporting technology has been firstly set up for plane mirror with large aperture and high accuracy

    Nanjing Institute of Astronomical Optics & Technology ,National Astronomical Observatories ,CAS