TMT tertiary mirror axis calibration with laser tracker

Abstract

To calibrate the tracing performance of the thirty meter telescope (TMT) tertiary mirror, for the special requirement of the TMT, the laser tracker is used to verify the motion. Firstly, the deviation is divided into two parts, namely, the repeatable error and the unrepeatable part. Then, based on the laser tracker, the mearturement and evalutation methods of the rigid body motion for the mirror are established, and the Monte Carol method is used to determine the accuracy of the mothod. Lastly, the mothod is applied to the turn table of a classical telescope and the residual error is about 4 arc second. The work of this paper will guide the next desgin and construction work of the thirty meter telescope tertiary mirror.

Keywords

Root Mean Square / Precision Engineer / Rotation Vector / Gravity Vector / Fine Mechanics

References

[1] Fu-guoW, FeiY, Hong-chaoZ. Chinese Optics, 2013, 6: 643

[2] FordV, CarterC, DelrezC. Jitter Studies for the Secondary and Tertiary Mirror Systems on the Thirty Meter Telescope, SPIE Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 2014, 9151: 1

[3] CaoX-t, SunT-y, ZhaoY-l. Chinese Optics, 2014, 7: 739

[4] LuR-s, LiW-h, LaoD-b. Optics and Precision Engineering, 2014, 22: 2299

[5] MacMynowskiD, BlaurockC, AngeliG. Dynamic Analysis of TMT, SPIE Modeling System Engineering and Project Management for Astronomy, 2008, 7017: 1

[6] ShenL-y, HuangC-c, QianJ-w. Optics and Precision Engineering, 2014, 22: 3310

[7] SkidmoreW, TravouillonT, RiddleR. Experiments at the W. M. Keck Observatory to Support the Thirty Meter Telescope Design Work, SPIE Ground based and Airborne Telescopes III, 2010, 7733: 1

[8] YangH-s, LiZ-l, XuH. Optics and Precision Engineering, 2014, 22: 3342

[9] Shu-tianL, RuiH, PingZ. Optics and Precision Engineering, 2013, 21: 1803

[10] MacMynowskiD G, ThompsonP M, SirotaM J. Analysis of TMT Primary Mirror Control-Structure Interaction, SPIE Modeling System Engineering and Project Management for Astronomy, 2008, 7017: 1

[11] ZhouS, GuoY-c, GaoC. Optics and Precision Engineering, 2014, 22: 1524

[12] MayoJ. Mechanical Jitter Measurement Results for Large Ground-Based Telescopes, SPIE Astronomical Structures and Mechanisms Technology, 2004, 5495: 98

This work has been supported by the National Natural Science Foundation of China (No.11403022).