1. A multi-spectral imaging (MSI) device, comprising: an imaging plane with at least two groups of pixels in an array of pixels for sensing at least two spectral bands, wherein the at least two spectral bands include a first spectral band and a second spectral band; and a diffractive optic for diffracting an electromagnetic wave into the at least two spectral bands and focusing each spectral band component of the electromagnetic wave onto the group of pixels for the spectral band to generate image, wherein an aperture of the diffractive optic redirects incoming light from a plurality of plane waves, wherein each plane wave has a different incident angle, and the imaging plane has a plurality of addressable pixels, wherein each addressable pixel is based on the incident angle of a plane wave and a spectral band.