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Proceedings Paper

A cryogenic tunable Fabry-Perot interferometer for astronomical observations
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Paper Abstract

The Lockheed Martin - University of Arizona Infrared Spectrometer (LAIRS) is designed to image the emission lines of celestial objects in the 1.3-2.5 μm regime. The Instrument has been built and tested at the Lockheed Martin Space Systems Advanced Technology Center, and demonstrated to work at cryogenic temperatures. The Instrument employs a tunable Fabry-Perot Interferometer (FPI) to select the wavelength at which the Instrument images targets. The FPI employs voice coil actuators and capacitive sensors to maintain parallelism of its reflective lenses and control their gap spacing. During functional tests of the FPI and the LAIRS instrument, finesse numbers of 60 and 24 were measured for the interferometer at room temperature and 80K, respectively. This measurement was performed using a laser operating at 1529.33 nm. This paper presents an overview of the optical, mechanical, and control design of the FPI, as well as a summary of cryogenic test results.

Paper Details

Date Published: 12 September 2007
PDF: 12 pages
Proc. SPIE 6692, Cryogenic Optical Systems and Instruments XII, 669208 (12 September 2007); doi: 10.1117/12.742100
Show Author Affiliations
Jonathan K. Chow, Lockheed Martin Advanced Technology Ctr. (United States)
Leigh Ann Ryder, Lockheed Martin Advanced Technology Ctr. (United States)
Ira Chapman, Lockheed Martin Advanced Technology Ctr. (United States)
Scott Horner, Lockheed Martin Advanced Technology Ctr. (United States)
Peter D. Dean, Lockheed Martin Advanced Technology Ctr. (United States)


Published in SPIE Proceedings Vol. 6692:
Cryogenic Optical Systems and Instruments XII
James B. Heaney; Lawrence G. Burriesci, Editor(s)

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