A speckle-based approach to compressive hyperspectral imaging

Rebecca French; Sylvain Gigan; Otto L. Muskens

doi:10.1117/12.2303993

14 May 2018 A speckle-based approach to compressive hyperspectral imaging

Rebecca French, Sylvain Gigan, Otto L. Muskens

Proceedings Volume 10657, Next-Generation Spectroscopic Technologies XI; 106570R (2018) https://doi.org/10.1117/12.2303993
Event: SPIE Commercial + Scientific Sensing and Imaging, 2018, Orlando, FL, United States

Abstract

Incorporating wavelength information into a monochrome image is of great interest for imaging spectroscopy. Here, we show that by exploiting the properties of multiple scattering materials, we can encode spectral information in a CMOS image, where the spectral resolution obtained is only limited by the scattering strength of the material. As a proof-of-concept, we demonstrate this technique using a thin multiple scattering layer of gallium phosphide nanowires and a microlens array. We achieve a spectral resolution of approximately 4 nm and a reconstructed image containing 64 pixels. We demonstrate that a computational technique which is commonly used in compressive sensing can be used to reconstruct both sparse and dense spectra, when undersampling and oversampling a signal, respectively. This method provides an ultra-compact solution to obtaining both spatial and spectral information in one measurement, for potential use in portable spectroscopy.

Citation Download Citation

Rebecca French, Sylvain Gigan, and Otto L. Muskens "A speckle-based approach to compressive hyperspectral imaging", Proc. SPIE 10657, Next-Generation Spectroscopic Technologies XI, 106570R (14 May 2018); https://doi.org/10.1117/12.2303993

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