Research on Key Technologies for Holographic Digital Panel Viewing Angle Enhancement

As a tool to display complex geographic data and topographic information, holographic digital panel is well used in 3D map environment display, virtual and real interactive command and inference. The holographic digital panel is realized based on the computer-generated holographic display. However, viewing angle is small due to the limited space-bandwidth product (SBP) of the spatial light modulator (SLM). In the paper, firstly, the principle of the holographic digital panel is analyzed. Secondly, the challenges and progresses for the viewing-angle enhancement is analyzed. Finally, the application of holographic digital panel is prospected.