| 摘要 |
An acoustic touch position sensor (16) is shown in which a transducer (18) coupled to a side of a substrate (10) imparts a shear wave (12) into the substrate for propagation along a first axis. A reflective array (28) is disposed along the first axis to reflect portions of the shear wave along a plurality of parallel paths extending across a touch surface (40) of the substrate to a second reflective array (30) the axis of which is parallel to the axis of the first reflective array. The second reflective array reflects the shear waves incident thereto to a transducer (20) mounted on the side of the substrate and responsive to shear waves propagated thereto for providing a signal representative of these shear waves. |
