Abstract: Apparatus and methods are used to control a polarization state of a radiation beam. A polarization control unit is configured to modulate a polarization state of at least a part of a radiation beam. A determination arrangement is configured to subsequently determine the polarization state of the at least a part of the radiation beam. A feedback unit is configured to provide signals to the polarization control arrangement based on at least the determined polarization state in order to correct for deviation in the polarization state of the part of the radiation beam from a desired polarization state. For example, the correction may ensure that the polarization state of the part of the radiation beam is at, or returns to, the desired polarization state.

Abstract: A vehicle illuminating device for the integrated attachment in each edge region of a motor vehicle, has a housing with at least one chamber, a light source positioned in a bracket, a reflector, an intermediate light disc with a prism arranged therein in at least partial regions, wherein the intermediate light disc has at least one signal function region dyed in a signal color, and electric connection contacts and a cover housing disc are spaced from the light disc. The reflector has in a first chamber a lateral section provided in a predominantly horizontal, lateral direction facing away from the vehicle. The housing has a lateral light region extending into the lateral region of the vehicle body, an additional lateral intermediate light disc arranged in the region, wherein the cover housing disc covers also the lateral light region with the lateral intermediate light disc from the outside at a distance.