Reconfigurable liquid crystal dispersing element for a computed tomography imaging spectrometer

Corrie Vandervlugt; Hugh Masterson; Nathan Hagen; Eustace L. Dereniak

doi:10.1117/12.719900

16 May 2007 Reconfigurable liquid crystal dispersing element for a computed tomography imaging spectrometer

Corrie Vandervlugt, Hugh Masterson, Nathan Hagen, Eustace L. Dereniak

Proceedings Volume 6565, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XIII; 65650O (2007) https://doi.org/10.1117/12.719900
Event: Defense and Security Symposium, 2007, Orlando, Florida, United States

Abstract

A Computed Tomography Imaging Spectrometer (CTIS) is an imaging spectrometer which can acquire a multi-spectral data set in a single snapshot (one focal plane array integration time) with no moving parts. Currently, CTIS instruments use a specially designed computer generated hologram (CGH) to disperse the light from a given spectral band into a grid of diffraction orders. The capabilities of the CTIS instrument can be greatly improved by replacing the static CGH dispersing element with a reconfigurable liquid crystal spatial light modulator. The liquid crystal spatial light modulator is tuned electronically, enabling the CTIS to remain a non-scanning imaging spectrometer with no moving parts. The ability to rapidly reconfigure the dispersing element of the CTIS allows the spectral and spatial resolution to change by varying the number of diffraction orders, diffraction efficiency, etc. In this work, we present the initial results of using a fully addressable, 2-D liquid crystal spatial light modulator as the dispersing element in a CTIS instrument.

Citation Download Citation

Corrie Vandervlugt, Hugh Masterson, Nathan Hagen, and Eustace L. Dereniak "Reconfigurable liquid crystal dispersing element for a computed tomography imaging spectrometer", Proc. SPIE 6565, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XIII, 65650O (16 May 2007); https://doi.org/10.1117/12.719900

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