Fig. 3

Two 3D scanning setups based on fringe-encoded stereo imaging. a Simplified schematic layout of both 3D imaging modules (top view). b, c Standard resolution scanner (Std-Res 3D scan at a lateral sampling resolution of \(25\,\upmu \hbox {m}\times 25\,\upmu \hbox {m}\)) also featuring gloss scanning, where c is a close-up of the imaging components (top view). d, e High-resolution 3D scanner (High-Res 3D scan at a lateral sampling resolution of \(7\,\upmu \hbox {m}\times 7\,\upmu \hbox {m}\)), whereby d is a close-up of the imaging components (front view). In all images (1) denotes the cameras, (2) the projector, (3) the vertical stage(s) and (4) the horizontal stage, \(\beta\) the imaging angle, \(\alpha\) the tilt angle of the lenses and l the working distance to the painting