target for a glass use case see fig5 the glass would return polarized light and the object of interest would return unpolarized light and only the light from the object would be able to go through the optical stack in some embodiments different polarizing arrangements may be used for example the polarizer may be a wire grid polarizer an absorptive polarizer a beam splitting polarizer a thin film polarizer or any other suitable polarization filter in some embodiments the detector may comprise an array of sensing elements at least one sensing element may have a polarizing arrangement such as discussed previously and at least one sensing element may not have a polarizing arrangement with such an arrangement the information obtained from the at least one sensing element provided with a polarizing arrangement may be compared with the information obtained from at least one sensing element without a polarizing arrangement the difference may be used to detect the presence of a reflective object such as a pane of glass or a mirror in particular if the range detected by the at least one sensing element without a polarizing arrangement is less than the range detected by the at least one sensing element with a polarizing arrangement then it can be determined that there is a reflective surface present some embodiments may be provided in a device 400 such as.