High resolution computer-generated cylindrical hologram

Abstract

We investigate the computer-generated cylindrical hologram. Since the general flat format hologram has a limited viewable area, we usually cannot see the other side of the reconstructed object. There are some holograms to solve this problem. A cylindrical-type hologram is well known as the 360-deg viewable hologram. There are two kinds of cylindrical holograms, a multiplex hologram and a laser reconstruction 360-deg hologram. Since the multiplex hologram consists of many 2-D pictures, the reconstructed image is not truly 3-D. In contrast, a laser reconstruction 360-deg hologram has a true 3-D effect. In our previous study, the computer-generated cylindrical hologram was realized as a Fresnel hologram. However, since the spatial resolution and pitch of the output device is not enough. Its panel size 14.5mm x 10.9mm, resolution 1,400 x 1,050pixel, pixel pitch 10.4μm of Liquid Crystal on Silicon use reduced to 1/12 and made a hologram. In this report, panel size 13.8mm x 7.56mm, resolution 1,920 x 1,080 pixel, pixel pitch 7μm of Liquid Crystal on Silicon use reduced to 1/16 and made a hologram. To scale up reconstructed image size, we calculated high resolution computer-generated cylindrical hologram. Then, we print these fringes with the improved output device. As a result, we obtain a good reconstructed image from a computer-generated cylindrical hologram.