Translator Disclaimer
Paper
13 June 2006 The Fourier-Kelvin Stellar Interferometer (FKSI) nulling testbed II: closed-loop path length metrology and control subsystem
Author Affiliations +
Abstract
The Fourier-Kelvin Stellar Interferometer (FKSI) is a mission concept for an imaging and nulling interferometer in the near to mid-infrared spectral region (3-8 microns), and will be a scientific and technological pathfinder for upcoming missions including TPF-I/DARWIN, SPECS, and SPIRIT. At NASA's Goddard Space Flight Center, we have constructed a symmetric Mach-Zehnder nulling testbed to demonstrate techniques and algorithms that can be used to establish and maintain the 104 null depth that will be required for such a mission. Among the challenges inherent in such a system is the ability to acquire and track the null fringe to the desired depth for timescales on the order of hours in a laboratory environment. In addition, it is desirable to achieve this stability without using conventional dithering techniques. We describe recent testbed metrology and control system developments necessary to achieve these goals and present our preliminary results.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
B. J. Frey, R. K. Barry, W. C. Danchi, T. T. Hyde, K. Y. Lee, A. J. Martino, and M. S. Zuray "The Fourier-Kelvin Stellar Interferometer (FKSI) nulling testbed II: closed-loop path length metrology and control subsystem", Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 62651N (13 June 2006); https://doi.org/10.1117/12.672467
PROCEEDINGS
8 PAGES


SHARE
Advertisement
Advertisement
Back to Top