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. In our last report, we manufactured the half cylindrical CGH 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 this report, we lowered the incidence angle of the illumination beam.to enlarge the reconstructed image.
