We employ a novel technique, which has recently become accessible whereby micro-polarizers are installed above individual pixels on the (CMOS) detector.
Micrograph from a scanning electron microscope of a micropolarizer array “superpixel.” The superpixel consists of 4 individual pixels, each or which is covered by a polarizers that transmits light with a given polarization. Stokes arithmetic of the flux in the 4 pixels can reveal the linear polarization angle and percentage for light in the super pixel. From Vorobiev et al. (2018).