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    segmented mirror active optics technology
    Update time: 2009-09-15
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    (second class prize of science & technology progress award of CAS in 1999)
    Active optics is key technogy for new generation large telescope。Segmented mirror technology is one of two kind of active optics。The technology core is to test sub-mirrors status of co-focus and co-phase while conduct correction。The experimental system is first one of segmented active optics in China which consists of three hexagonal sub-mirrors with diagonal of 250mm,can reach 0.07 arcseconds (RMS) with accuracy of co-focus。The system can frequently obtain and maintaindiffracted image of co-phase with aperture of 220mm at λ=650nm (within approximately twenty minutes )。International advanced level has been reached on key technology of segmented mirror active optics for the experimental system which not only lay down a sound foundation for development next generation large telescope adopted segmented mirror technology in China but also bring a lot of technology and methods into application for Chinese Mega-science project LAMOST。

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