Abstract

We have previously reported on coded aperture snapshot spectral imagers (CASSI) that can capture a full frame spectral image in a snapshot. Here we describe the use of CASSI for spectral imaging of a dynamic scene at video rate. We describe significant advances in the design of the optical system, system calibration procedures and reconstruction method. The new optical system uses a double Amici prism to achieve an in-line, direct view configuration, resulting in a substantial improvement in image quality. We describe NeAREst, an algorithm for estimating the instantaneous three-dimensional spatio-spectral data cube from CASSI’s two-dimensional array of encoded and compressed measurements. We utilize CASSI’s snapshot ability to demonstrate a spectral image video of multi-colored candles with live flames captured at 30 frames per second.

© 2009 Optical Society of America

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History
Original Manuscript: January 28, 2009
Manuscript Accepted: March 20, 2009
Revised Manuscript: March 19, 2009
Published: April 2, 2009

References

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Author Affiliations

Ashwin A. Wagadarikar, Nikos P. Pitsianis, Xiaobai Sun, David J. Brady

Duke University

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