The first demonstration of this technology opened the door for an expandable holographic 3D display, and the research results were published in the journal Light: Science and Application.
It is reported that holographic displays can reconstruct high-quality images to obtain real 3D visual perception, and they are considered as the ultimate display technology to connect the real world and the virtual world for immersive experience.
From 2D high-resolution TV to 3D holographic augmentation or virtual reality, and large true 3D displays. These monitors need to support a large number of data streams. For a 2D full HD display, the information data rate is about 3 gigabits per second (Gb/s), but a 3D display with the same resolution needs a data rate of 3Tb per second, which is currently impossible.
Professor Zhu Daping from the Engineering Department of Cambridge University, who led the research, said, "It is a great challenge to provide a perfect 3D experience with current technology. In the past ten years, we have been working with our partners to develop holographic displays that can achieve large size and large field of view at the same time, which needs to match holograms with a large amount of optical information content. "
However, at present, the information content of holographic information is much greater than that of the current optical engine (spatial light modulator) because of its limited spatial bandwidth product.
To meet this challenge, about seven years ago, researchers from CAPE and Disney Research Center developed a holographic brick unit, which is based on a rough integrated holographic display for tiling 3D images in corners.
Each holographic tile uses a spatial light modulator with high information bandwidth to transmit information with rough integrated optics to form a tiled 3D hologram with a large viewing angle. Careful optical design ensures that holographic stripe patterns fill the whole surface of holographic tiles, so that multiple holographic tiles can be stacked seamlessly, forming an expandable 3D display of spatial tiled holographic images with wide viewing angle and large size.
The proof of concept developed by the researchers consists of two seamless holographic bricks. The pixel of each panchromatic brick is 1024 768, and the field of view is 40, with 24 frames per second, which is used to display the full 3D image of the mosaic hologram.