For object detection, a two-step group scan to the traces of a capacitive touch sensor is performed, thereby dramatically shortening the overall scanning time and reducing noise effect. In a preferred embodiment, the principal combination includes a thermal wave measurement and a spectroscopic ellipsometric measurement. Fluid elastomeric material is injected into the mold cavities at the same time, so that a glazing profile is molded onto each of the panes of glass concurrently.