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Proceedings Paper

The fulfillment of two-level control in experimental optical delay line of Michelson Stellar Interferometer
Author(s): Li Chao; Zhen Wu; Jianing Wang; Yi Liu; Yi Chen
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Paper Abstract

This article is focused on the two-level control system of ODL, which are divided into bottom layer control of linear motor and upper layer control of Piezoelectric Transducer(PZT).This ODL are designed to compensate geometrical optical path difference, which results from the earth rotation, and other disturbances, with high-accuracy and real time. Based on the PLC of PMAC controller, the linear motor tracks the trajectory of the simulated optical path difference to compensate roughly. PZT then compensates the rest error measured by ZLM almost real time. A detailed fulfillment of this method is shown in the article, and the first result data is produced. The result implies that this method is efficient. This article offers the reference for the ODL development with the practical high accuracy of compensation.

Paper Details

Date Published: 22 July 2010
PDF: 7 pages
Proc. SPIE 7734, Optical and Infrared Interferometry II, 77344G (22 July 2010); doi: 10.1117/12.856667
Show Author Affiliations
Li Chao, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Zhen Wu, Nanjing Institute of Astronomical Optics & Technology (China)
Jianing Wang, Nanjing Institute of Astronomical Optics & Technology (China)
Yi Liu, Nanjing Institute of Astronomical Optics & Technology (China)
Yi Chen, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 7734:
Optical and Infrared Interferometry II
William C. Danchi; Françoise Delplancke; Jayadev K. Rajagopal, Editor(s)

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