Abstract
In our previous research, we have investigated the real image reconstruction from a flat computer-generated hologram (CGH). The real image CGH offers 3D real images that project to the observer's, fingertips. However, since a flat real image CGH requires the high spatial frequency, the real image CGH usually does not offer the enough viewing angle and the size of the reconstructed images as the practical display. It is necessary for the practical display to expand viewing angle. The alcove hologram was reported as the real image display and the wide viewing angle display. The alcove hologram offers real images with an angle of view of nearly 180 degrees by transforming the shape to half cylindrical. However, the alcove hologram does not have the vertical parallax. In this report, we manufactured the half cylindrical CGH like the alcove hologram. Therefore, the half cylindrical CGH provides the real image with wide viewing angle. Furthermore, the half cylindrical CGH has the vertical parallax and reconstructs the virtual objects. In addition, we manufactured the device to reconstruct real image from the half cylindrical CGH.
