Color Animated Full-parallax High-definition Computer-generated Hologram

We realized color animation of a computer-generated hologram (CGH) while retaining the features of the conventional full-parallax high-definition CGH (FPHD-CGH) method such as large screen size and a wide viewing area. Since the FPHD-CGH is fabricated using a laser direct writing system, the only way to animate it is to switch structured illumination (SI), and even that method has the problem of overlapping images from different frames caused by light leakage. We propose a method of suppressing this light leakage while maintaining image quality by applying erosion to SI. We also developed the world’s first two-frame color animation prototype, which is 18 cm square and has a 30-degree viewing angle horizontally and vertically. We did this by combining our method with the existing FPHD-CGH colorization method.