title: Active control of a 30 m ring interferometric telescope primary mirror.
abstract: The active control of a primary mirror for a ring aperture segmented telescope is different from that of a full aperture segmented telescope. Two active maintenance proposals for the ring telescope designed from the segmented patterns are outlined. We present a preliminary calculation of noise propagation and analysis of primary mirror mode characteristics for each proposal. The modulation transfer functions (MTFs) of the primary mirror corresponding to each maintenance method at several typical working wavelengths are also simulated.
authors.affiliation: Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, China. daiyichun@ynao.ac.cn
authors.forename: Yichun
authors.initials: Y
authors.lastname: Dai
authors.forename: Zhong
authors.initials: Z
authors.lastname: Liu
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Jin
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.forename: Jing
authors.initials: J
authors.lastname: Lin