The fulfillment of two-level control in experimental optical delay line of Michelson Stellar Interferometer

Li Chao; Zhen Wu; Jianing Wang; Yi Liu; Yi Chen

doi:10.1117/12.856667

21 July 2010 The fulfillment of two-level control in experimental optical delay line of Michelson Stellar Interferometer

Li Chao, Zhen Wu, Jianing Wang, Yi Liu, Yi Chen

Author Affiliations +

Proceedings Volume 7734, Optical and Infrared Interferometry II; 77344G (2010) https://doi.org/10.1117/12.856667
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

Li Chao, Zhen Wu, Jianing Wang, Yi Liu, and Yi Chen "The fulfillment of two-level control in experimental optical delay line of Michelson Stellar Interferometer", Proc. SPIE 7734, Optical and Infrared Interferometry II, 77344G (21 July 2010); https://doi.org/10.1117/12.856667

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