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Proceedings Paper

Application of fixed delay Michelson interferometer for radial velocity measurement
Author(s): Kai Zhang; Mingda Jiang; Yongtian Zhu
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Paper Abstract

Fixed Delay Michelson Interferometer (FDMI) also called Wide-Angle Michelson Interferometer (WAMI) is different from conventional Michelson interferometer. Its fixed delay is not only useful to widen the field of view, but also improve the accuracy of RV measurement. So it's widely known that works well on upper atmospheric wind study by measuring the Doppler shift of single emission lines. On the other hand, a new technique called External Dispersed Interferometry (EDI) can efficiently overcome the fundamental limitation of narrow bandpass of interferometer by combination between FDMI and post-disperser. The related instruments have been successfully used in the exoplanet exploration field. In this paper, the FDMI concept and its application in these two fields are reviewed, and a major astronomical project in China, which is developing a multi-object exoplanet survey system (MESS) based on FDMI, is introduced.

Paper Details

Date Published: 21 July 2010
PDF: 9 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 773555 (21 July 2010); doi: 10.1117/12.856238
Show Author Affiliations
Kai Zhang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Mingda Jiang, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)
Graduate Univ. of Chinese Academy of Sciences (China)
Yongtian Zhu, National Astronomical Observatories, Nanjing Institute of Astronomical Optics & Technology (China)


Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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