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21 October 2004 Hyperspectral-dual spectral region imaging spectrometer
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A temporally and spatially non-scanning imaging spectrometer covering two separate spectral bands in the visible region using computed tomographic imaging techniques is described. The computed tomographic techniques allows for the construction of a three dimensional hyperspectral data cube (x, y, λ) from the two dimensional input in a single frame time. A computer generated holographic dispersive grating is used to disperse the incoming light into several diffraction orders on a focal plane composed of interwoven pixels independently sensitive to the two bands of interest. Separating the input of the two pixel types gives co-registered output between the two bands and overcomes the limitation of overlapping orders. The proof of concept in the visible is presented using a commercially available camera and the extension to the infrared is proposed.
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John Hartke and Eustace L. Dereniak "Hyperspectral-dual spectral region imaging spectrometer", Proc. SPIE 5563, Infrared Systems and Photoelectronic Technology, (21 October 2004);

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