Integral field spectral imager

A spectral imager comprising:

• an image sensor comprising a superpixel array having a plurality of superpixels, each superpixel comprising at least four pixels;
• a plurality of optical homogenizers, each optical homogenizer being in-register with a corresponding different superpixel in the superpixel array, being positioned to receive electromagnetic radiation (EMR), and being configured to spatially homogenize the received EMR and to pass the spatially homogenized EMR to the in-register, corresponding different superpixel;
• an optical filter array positioned between each optical homogenizer and the in-register, corresponding different superpixel and comprising a plurality of spectral filters, wherein at least four spectral filters in the plurality of spectral filters are configured to spectrally filter the spatially homogenized EMR differently from one another and to pass the spectrally filtered, spatially homogenized EMR to the in-register, corresponding different superpixel, and wherein each of the at least four pixels is in-register with a different one of the at least four differently configured spectral filters and is positioned to receive the spectrally filtered, spatially homogenized EMR passed by the in-register spectral filter;
• and,
• a plurality of baffles, each baffle being configured and positioned to maximize confinement of the spatially homogenized EMR passed by a single optical homogenizer in the plurality of optical homogenizers to the in-register, corresponding different superpixel.