Lidar sensor system having improved surface quality

A sensor system comprising

• a LiDAR unit having an emitter for laser light having a wavelength of 800 nm to 1600 nm and a receiver for light having a wavelength of 800 nm to 1600 nm;
• a cover arranged such that IR light emitted by the LiDAR unit and received thereby passes through the cover,
• wherein
• the cover comprises a layer of a thermoplastic material, wherein the thermoplastic material contains a transparent thermoplastic polymer and a monoester of a monocarboxylic acid having ≥10 carbon atoms and an alcohol having ≥3 carbon atoms, wherein the monoester is a monoester of a monocarboxylic acid having ≥15 carbon atoms and glycerol or a monoalcohol having ≥15 carbon atoms,
• with the proviso that the thermoplastic material is free from mono-, di-, tri- and tetraesters of stearic acid and pentaerythritol.