Abstract: The apparatus for providing an autostereoscopic view of three dimensional structures includes a display device including several different two-dimensional views of a three-dimensional structure, optical image forming devices arranged in front of the display device and a screen for forming images in an observation plane from light rays issuing from the optical image forming devices so that images of the two-dimensional views appear in respective observation zones in the observation plane. The optical image forming devices (AE) are provided with aperture stops and include a device for overlapping the observation zones (BZ6) to form overlapping zones (UZ6). The aperture stops are provided with edge regions having a continuous transitional decrease of light transmission from complete transmission at their edges to zero transmission at a predetermined distance from their edges.

Abstract: The circuit device has a plurality of cascaded stages. Each cascaded stage includes several partial stages and has at most two capacitors (C.sub.n1, C.sub.nB) and at most seven transistors (T.sub.n1, T.sub.n2, T.sub.n3, T.sub.n4, T.sub.n5, T.sub.n6, T.sub.n7). The circuit device includes a device for controlling the cascaded stages with four periodic clock signals (.PHI..sub.1, .PHI..sub.2, .PHI..sub.3, .sub.101 .sub.4) phase-shifted about 90.degree. relative to each other such that each of the cascaded stages is controlled by a respective assigned one of four predetermined sets of two of the four periodic clock signals and the same one of the four predetermined set repeats every fifth cascaded stage. Each cascaded stage includes an output stage (12, 12') including a bootstrap-capacitor (C.sub.nB) and three transistors (T.sub.n5, T.sub.n6, T.sub.n7) electrically connected to the bootstrap-capacitor (C.sub.nB); and a charging and discharging stage (11) for the bootstrap-capacitor (C.sub.nB).