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DISP Spectral Imaging Projects

Multiframe Coded Aperture Spectral Imagers (CASSI)

Multiframe Coded Aperture Spectral Imagers are based off the CASSI system, but modulate the coded aperture between every snapshot to increase the rank of the system matrix. For static scenes, this greatly enhances the reconstruction quality with only slight computational and acquistion overhead.

MCASI
 

Coded Aperture Snapshot Spectral Imagers (CASSI)

Coded Aperture Snapshot Spectral Imagers are computational sensors that are able to recover a 3D datacube representing spatial and spectral information at every pixel in an image of a scene using just one snapshot 2D projection. The imagers rely on aperture coding and compressed sensing theory to achieve snapshot spectral imaging.

CASSI
 

Computational Spectral Microscopy

Computational Spectral Microscopy

We have extended the use of high throughput spectrometers to spectral microscopy applications. A pushbroom scanned high-throughput spectrometer on the back-end of a microscope creates a three dimensional cube (2D spatial, 1D spectral) from a fluorescent fixed-cellular assay. Current system designs include a snapshot dual disperser (DD-CASSI) architecture. Our goal includes imaging dynamic cellular events using fluorescence microscopy as a tool. The benefits of these computational spectral imagers applied to microscopy include high throughput analysis and a higher spectral measurement when compared to conventional spectral imaging systems.