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Proceedings Paper

Demonstration of the wide-field imaging interferometer testbed using a calibrated hyperspectral image projector
Author(s): Matthew R. Bolcar; David Leisawitz; Stephen Maher; Stephen Rinehart
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Paper Abstract

The Wide-field Imaging Interferometer testbed (WIIT) at NASA’s Goddard Space Flight Center uses a dual-Michelson interferometric technique. The WIIT combines stellar interferometry with Fourier-transform interferometry to produce high-resolution spatial-spectral data over a large field-of-view. This combined technique could be employed on future NASA missions such as the Space Infrared Interferometric Telescope (SPIRIT) and the Sub-millimeter Probe of the Evolution of Cosmic Structure (SPECS). While both SPIRIT and SPECS would operate at far-infrared wavelengths, the WIIT demonstrates the dual-interferometry technique at visible wavelengths. The WIIT will produce hyperspectral image data, so a true hyperspectral object is necessary. A calibrated hyperspectral image projector (CHIP) has been constructed to provide such an object. The CHIP uses Digital Light Processing (DLP) technology to produce customized, spectrally-diverse scenes. CHIP scenes will have approximately 1.6-micron spatial resolution and the capability of producing arbitrary spectra in the band between 380 nm and 1.6 microns, with approximately 5-nm spectral resolution. Each pixel in the scene can take on a unique spectrum. Spectral calibration is achieved with an onboard fiber-coupled spectrometer. In this paper we describe the operation of the CHIP. Results from the WIIT observations of CHIP scenes will also be presented.

Paper Details

Date Published: 12 September 2012
PDF: 9 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 84452D (12 September 2012); doi: 10.1117/12.926221
Show Author Affiliations
Matthew R. Bolcar, NASA Goddard Space Flight Ctr. (United States)
David Leisawitz, NASA Goddard Space Flight Ctr. (United States)
Stephen Maher, NASA Goddard Space Flight Ctr. (United States)
Science Systems and Applications, Inc. (United States)
Stephen Rinehart, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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