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Design of a novel high precision opto-electronic levelmeter
Guoping Li; Qiuhui He; Xinnan Li
2004-09-29
Source PublicationAstronomical Structures and Mechanisms Technology
Volume5495
Issue5495
PagesVol.5495 670-676
Conference Date2004-6-21
Conference PlaceGlasgow, Scotland
Funding OrganizationThe International Society for Optical Engineering
PublisherSPIE
Abstract
For currently market available levelmeter can not meet the requirement for measuring the azimuth mounting of the LAMOST, this paper presents a novel design scheme of an opto-electronic levelmeter with needed high precision. The levelmeter is essentially a combination of an optical front end and a computer aided measuring back end. The light from a point source is firstly turned to be parallel and reflected by a tip-tilt mirror which keeps pointing to the zenith and then imaged onto a CCD target through optical system, afterwards, the position of the image spot is processed by computer software to give measurement results. By rotating the LAMOST mounting about azimuth axis with the levelmeter on it, the axis system is measured, and if the measured azimuth axis is not
perpendicular enough, the image spot on CCD target is to offset some distance by which the tilt angle of the axis can be evaluated. The design principle and data processing of the levelmeter are detailed systematically in this paper. Experiment results confirmed that the accuracy of the levermeter is up to 0.043” beyond that required by the technical specification of the LAMOST. Also, the novel levermeter is applicable to measuring azimuth axes of other telescopes
KeywordAstronomical Telescopes Alt-azimuth Mounting Levelmeter Data Processing
Subject Area天文技术与方法
Document Type会议论文
Identifierhttp://ir.niaot.ac.cn/handle/114a32/383
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
Guoping Li,Qiuhui He,Xinnan Li. Design of a novel high precision opto-electronic levelmeter[C]:SPIE,2004:Vol.5495 670-676.
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