Abstract: The invention relates to an antenna arrangement for a radar sensor, having: an antenna body and a printed circuit board, which form a waveguide antenna. The antenna body has a first surface facing the printed circuit board and a second surface facing away from the printed circuit board. The first surface is formed with a first structure that provides wave interfaces to the printed circuit board and forms a waveguide structure. The antenna body is designed with transmitting and/or receiving structures, and the second surface is formed with a second structure that reduces undesirable surface effects.

Abstract: An optical lens system is provided with at least two lenses firmly bonded to each other. A first lenshas a first adhered surface and a second lens has a second adhered surface. The adhered surfaces are at least indirectly firmly bonded to each other. An optically transparent surface body made of a silicone material is arranged between the adhered surfaces. The first adhered surface is firmly bonded to a first side and the second adhered surface is firmly bonded with the opposite second side of the sheet body by means of a bonding method.