High Etendue Imaging Fourier Transform Spectrometer: initial results

Richard F. Horton; Chris A. Conger; L. S. Pelligrino

doi:10.1117/12.283839

31 October 1997 High Etendue Imaging Fourier Transform Spectrometer: initial results

Richard F. Horton, Chris A. Conger, L. S. Pelligrino

Author Affiliations +

Proceedings Volume 3118, Imaging Spectrometry III; (1997) https://doi.org/10.1117/12.283839
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

At the Denver meeting, last year, we presented the High Etendue Imaging Fourier Transform Spectrometer, (HEIFTS), theory and optical design. This device uses a new 'image plane interferometer' geometry to produce 'autocorrelation function modulation' in the image plane of a 2D imaging array, such that the phase offset of the modulation varies linearly across the image. As a 2D image is pushbroomed across the imaging, array, the record of an individual scene pixel is recorded for each autocorrelation phase offset. The 3D array of this data is processed to yield an 'autocorrelation function' data cube, which is Fourier transformed to yield a 'wavenumber' hyperspectral data curve. A phase I device has been demonstrated in the laboratory and initial results are presented. The significant increase in signal to noise ratio, which the HEIFTS optical design promises over conventional hyperspectral imaging schemes, has been simulated, and results will be discussed. A Phase II system is being prepared for initial field deployment, and will be described.

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Richard F. Horton, Chris A. Conger, and L. S. Pelligrino "High Etendue Imaging Fourier Transform Spectrometer: initial results", Proc. SPIE 3118, Imaging Spectrometry III, (31 October 1997); https://doi.org/10.1117/12.283839

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