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Proceedings Paper

A new efficient laser angle metrology system for maintaining the Large Radio Telescope active reflecting antenna
Author(s): Yong Zhang; Dehua Yang; Yeping Li; Guohua Zhou; Aihua Li; Guoping Li; Zhenchao Zhang
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Paper Abstract

Radio telescopes with much more larger aperture collect much more signals and therefore sought after by astronomers. The primary reflecting antenna is traditionally segmented and perfectly optically aligned at the central altitude among the whole observation sky area for minimizing the gravitational deformation during operation and passively open-loop maintained at any other altitude. A new laser segmentation sensing and maintaining method based on normal deflection angle measurement is proposed in this paper. After the introduction of the theory, the method is simulated and tested on a special prototype of radio panel segmentation system. It provides real-time monitoring and measurement of the global segmentation status of all panels and is proved to be a high accurate, high efficient and low cost method. Finally several conclusions are reached.

Paper Details

Date Published: 5 August 2010
PDF: 8 pages
Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77333M (5 August 2010); doi: 10.1117/12.856747
Show Author Affiliations
Yong Zhang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Dehua Yang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Yeping Li, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Guohua Zhou, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Aihua Li, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Guoping Li, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Zhenchao Zhang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 7733:
Ground-based and Airborne Telescopes III
Larry M. Stepp; Roberto Gilmozzi; Helen J. Hall, Editor(s)

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