Abstract

A coded aperture snapshot spectral imager (CASSI) estimates the three-dimensional spatiospectral data cube from a snapshot two-dimensional coded projection, assuming that the scene is spatially and spectrally sparse. For less spectrally sparse scenes, we show that the use of multiple nondegenerate snapshots can make data cube recovery less ill-posed, yielding improved spatial and spectral reconstruction fidelity. Additionally, data acquisition can be easily scaled to meet the time/resolution requirements of the scene with little modification or extension of the original CASSI hardware. A multiframe reconstruction of a $640\times 480\times 53$ voxel datacube with $450–650\mathrm{nm}$ white-light illumination of a scene reveals substantial improvement in the reconstruction fidelity, with limited increase in acquisition and reconstruction time.

© 2010 Optical Society of America

Identification of fluorescent beads using a coded aperture snapshot spectral imager

Christy Fernandez Cull, Kerkil Choi, David J. Brady, and Tim Oliver
Appl. Opt. 49(10) B59-B70 (2010)

Single disperser design for coded aperture snapshot spectral imaging

Ashwin Wagadarikar, Renu John, Rebecca Willett, and David Brady
Appl. Opt. 47(10) B44-B51 (2008)

Dual-camera design for coded aperture snapshot spectral imaging

Lizhi Wang, Zhiwei Xiong, Dahua Gao, Guangming Shi, and Feng Wu
Appl. Opt. 54(4) 848-858 (2015)

Video rate spectral imaging using a coded aperture snapshot spectral imager

Ashwin A. Wagadarikar, Nikos P. Pitsianis, Xiaobai Sun, and David J. Brady
Opt. Express 17(8) 6368-6388 (2009)

Coded aperture snapshot spectral polarization imaging

Tsung-Han Tsai and David J. Brady
Appl. Opt. 52(10) 2153-2161 (2013)