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The active support system of LAMOST reflecting Schmidt plate
Xiangqun Cui; Yeping Li; Xiaoyu Ni; Dehua Yang; Zhengqiu Yao; Guoping Li; Yuefei Wang
Source PublicationLarge Ground-based Telescopes
PagesVol.4837 628-636
Conference Date2002-8-22
Conference PlaceHawaii USA
Funding OrganizationThe International Society for Optical Engineering
The reflecting Schmidt plate MA of LAMOST is with 5.7m x 4.4m reflecting area and consists of 24 segmented hexagonal sub-mirrors. Each sub-mirror is 25mm in thickness and 1.1m in diagonal. To correct the spherical aberration of the primary mirror, during observation, the aspherical shape of MA should be changed in every 1.5 minutes. To achieve the good image during observation, the active support system of MA will not only create the correct off-axis aspherical shape on each sub-mirror, but also maintain the co-focus for all 24 sub-mirrors.

This paper presents the studying design with finite element analysis and experiments on the active support system of MA, including its axial and lateral supports, force actuators, optimization of the stiffness of the force actuator, sub-mirror cell, the mirror support structure etc. There are 30 force actuators and three position actuators, which support each sub-mirror and connected by sub-mirror cell. Total 24 sub-mirror cells located on the top of the MA main support structure. All force actuators work as both active and passive supports for each sub-mirror. It showed that the support system is complex but should work properly within the optical requirement.
KeywordAstronomical Telescope Active Optics Mirror Support System Mirror Cell
Subject Area郭守敬望远镜(lamost) ; 主动光学
Document Type会议论文
Recommended Citation
GB/T 7714
Xiangqun Cui,Yeping Li,Xiaoyu Ni,et al. The active support system of LAMOST reflecting Schmidt plate[C]:SPIE,2003:Vol.4837 628-636.
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