A probe device (800, 900) comprising: a main body portion (840, 910) including a curved surface; a plurality of tiles (805, 905) each coupled to the main body portion via the curved surface, wherein, in the cross-sectional plane, the plurality of tiles are distributed around the main body portion, the plurality of tiles each including: a plurality of microelectromechanical piezoelectric transducer elements; and a base including a first flat side adjoining and supporting the plurality of microelectromechanical piezoelectric transducer elements, wherein the first flat side faces away from the curved surface; and a lens structure which extends around the main body portion in the cross-sectional plane, the lens structure including curved lens portions each coupled to a respective one of the plurality of tiles, wherein, in the cross-sectional plane, the curved lens portions are distributed around the main body portion and each of the curved lens portions adjoins a respective other of the curved lens portions, wherein, for each tile of the plurality of tiles, the plurality of microelectromechanical piezoelectric transducer elements of the tile are configured to propagate a wave away from the curved surface and toward the respective curved lens portion, characterized in that, for each of the curved lens portions, a concavity of the lens portion or a convexity of the lens portion ends in a region between the respective tile and a corresponding other tile closest to the respective tile. a main body portion (840, 910) including a curved surface; a plurality of tiles (805, 905) each coupled to the main body portion via the curved surface, wherein, in the cross-sectional plane, the plurality of tiles are distributed around the main body portion, the plurality of tiles each including: a plurality of microelectromechanical piezoelectric transducer elements; and a base including a first flat side adjoining and supporting the plurality of microelectromechanical piezoelectric transducer elements, wherein the first flat side faces away from the curved surface; and a plurality of microelectromechanical piezoelectric transducer elements; and a base including a first flat side adjoining and supporting the plurality of microelectromechanical piezoelectric transducer elements, wherein the first flat side faces away from the curved surface; and a lens structure which extends around the main body portion in the cross-sectional plane, the lens structure including curved lens portions each coupled to a respective one of the plurality of tiles, wherein, in the cross-sectional plane, the curved lens portions are distributed around the main body portion and each of the curved lens portions adjoins a respective other of the curved lens portions, wherein, for each tile of the plurality of tiles, the plurality of microelectromechanical piezoelectric transducer elements of the tile are configured to propagate a wave away from the curved surface and toward the respective curved lens portion, characterized in that, for each of the curved lens portions, a concavity of the lens portion or a convexity of the lens portion ends in a region between the respective tile and a corresponding other tile closest to the respective tile.