Skin gloss measurement using Brewster's angle

A system comprising a sensor for measuring a skin parameter, the sensor comprising (i) a plurality of spatially separated light sources configured to provide light source light, and (ii) a detector configured at a first distance from each of the light sources, wherein the sensor is configured to provide the light source light with optical axes under an angle of incidence selected from the range of 10-80° with the skin at a second distance and to detect reflected light source light, wherein the plurality of spatially separated light sources comprises at least three light sources, wherein the light sources are configured to provide visible light source light, wherein the visible light source light is unpolarized, and wherein the first distance is selected from the range of 10-80 mm, wherein the detector is configured to detect polarized light, wherein the sensor comprises a polarizer configured upstream of the detector, and wherein the polarizer comprises one or more of a segmented polarizer including a pixelated wire grid polarizer with two adjacent pixels having polarization orientations that are perpendicular to each other.