A functionalized waveguide for a detector system, wherein the waveguide comprises a transparent base body having a front side and a rear side , wherein the base body comprises a partly transparent input coupling region and an output coupling region spaced apart therefrom in a first direction (R1), wherein the input coupling region deflects only a portion of radiation coming from an object to be detected and impinging on the front side , such that the deflected portion propagates as coupled-in radiation in the base body as far as the output coupling region by means of reflections and impinges on the output coupling region , wherein the output coupling region deflects at least one portion of the coupled-in radiation impinging on it, such that the deflected portion emerges from the base body via the front side or rear side in order to impinge on the detector system , wherein the input coupling region comprises a plurality of diffractive input coupling structures, which differ in that they comprise different horizontal fields of view in a plane spanned by a perpendicular to the front side and a second direction transverse to the first direction, such that said structures deflect radiation from the different horizontal fields of view toward the output coupling region , characterized in that the diffractive input coupling structures are embodied such that they encode the radiation from the different horizontal fields of view during the deflection by means of different deflected wavelengths, such that the output coupling and/or detection are/is possible selectively for the different horizontal fields of view. wherein the waveguide comprises a transparent base body having a front side and a rear side , wherein the base body comprises a partly transparent input coupling region and an output coupling region spaced apart therefrom in a first direction (R1), wherein the input coupling region deflects only a portion of radiation coming from an object to be detected and impinging on the front side , such that the deflected portion propagates as coupled-in radiation in the base body as far as the output coupling region by means of reflections and impinges on the output coupling region , wherein the output coupling region deflects at least one portion of the coupled-in radiation impinging on it, such that the deflected portion emerges from the base body via the front side or rear side in order to impinge on the detector system , wherein the input coupling region comprises a plurality of diffractive input coupling structures, which differ in that they comprise different horizontal fields of view in a plane spanned by a perpendicular to the front side and a second direction transverse to the first direction, such that said structures deflect radiation from the different horizontal fields of view toward the output coupling region , characterized in that the diffractive input coupling structures are embodied such that they encode the radiation from the different horizontal fields of view during the deflection by means of different deflected wavelengths, such that the output coupling and/or detection are/is possible selectively for the different horizontal fields of view. <EOS>