PROTECTION UNIT AND DETECTION ASSEMBLY FOR A MOTOR VEHICLE

The invention relates to a protection unit for protecting an optical surface and to a detection assembly combining an apparatus emitting or capturing radiation through an optical region of interest of the optical surface. The protection unit further includes at least one wave transducer configured to generate an acoustic wave on or in the optical surface in order to clean the optical region of interest. According to the invention, the optical surface has at least one through-hole through which electrical wires for supplying power to the wave transducer extend.