NIAOT OpenIR  > 中国科学院南京天文光学技术研究所  > 会议论文
Design Evolution and Evaluation of the Segmented Reflecting Schmidt Mirror Cell of the LAMOST Telescope
Dehua Yang; Kunxin Chen; Yongjun Liang; Xiangqun Cui
2005-08-30
Source PublicationOptomechanics 2005
Volume5877
Issue5877
PagesVol.5877 0W-1-12
Conference Date2005-7-31
Conference PlaceSan Diego, California, USA
Funding OrganizationThe International Society for Optical Engineering
PublisherSPIE
Abstract
The reflecting Schmidt plate of the Large sky Area Multi-Object Spectroscopic Telescope (LAMOST) is segmented with 24 thin hexagonal sub-mirrors of 1.1 meters tip-tip each. It not only serves as active corrector for eliminating spherical aberration of the fixed segmented spherical primary mirror but also collaborates with focal plane in between to do pointing and tracking with an alt-azimuth mounting. This paper describes the evolution and evaluation of the structural design of the reflecting Schmidt mirror cell onto which sub-mirror systems are connected. Technical requirements are presented before a brief history of evolution of the mirror cell throughout the progress of the LAMOST project. Based on final elevation driving and balancing scheme, a final design of the mirror cell has been reached and evaluated with finite element method. Following the principle of deflection-independent, the design is actually a hybrid of space frame and truss structure meeting technical requirements with low weight, high stiffness and clear accessibility. Gravitational analysis results that the maximum deflection is about 1 mm through overall observing sky area of -10º≤δ≤90º, and modal extraction finds that the lowest eigenfrequency is about 30 Hz. Relevant investigation of elevation axis trunnion preload and driving force effect as well as evaluation of typical thermal and static wind disturbance also confirm the excellent performance of the final design of the Schmidt mirror cell.
KeywordThe Lamost Schmidt Telescope Segmented Mirror Mirror Cell Structural Design And Analysis Finite Element Method
Subject Area郭守敬望远镜(lamost) ; 天文技术与方法
Document Type会议论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/414
Collection中国科学院南京天文光学技术研究所_会议论文
望远镜新技术研究室_会议论文
Recommended Citation
GB/T 7714
Dehua Yang,Kunxin Chen,Yongjun Liang,et al. Design Evolution and Evaluation of the Segmented Reflecting Schmidt Mirror Cell of the LAMOST Telescope[C]:SPIE,2005:Vol.5877 0W-1-12.
Files in This Item: Download All
File Name/Size DocType Version Access License
Design Evolution and(1440KB) 开放获取CC BY-NC-NDView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Dehua Yang]'s Articles
[Kunxin Chen]'s Articles
[Yongjun Liang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Dehua Yang]'s Articles
[Kunxin Chen]'s Articles
[Yongjun Liang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Dehua Yang]'s Articles
[Kunxin Chen]'s Articles
[Yongjun Liang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Design Evolution and Evaluation of the Segmented Reflecting Schmidt.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.