The hologram is a very attractive form of virtual content. Holographic exhibitions will involve holographic projections of the VR contents (including 3D reconstructions etc…) created for each site by the project, which will be used for AR audio-video guides and for the VR InfoPoint Booths.
Technical equipment may include:
Projection on translucent panel
plexiglas panel, satin or with a slightly opaque film, to realize a rear projection of subjects cut out on black. It is an economic solution but not referable to the scientific definition of hologram. It can have a discreet rendering in very dark environments
Transparent LED panels
One of the latest holographic solutions is transparent LED displays.
The current models can be used in a wide range of applications such as showcases, airports, museums, fairs, shows, art installations, shopping malls, The distance between pixels and brightness determine the quality and price of these solutions. The evolution of these solutions is very fast, and transparent LED displays look increasingly interesting in terms of visual quality, power, energy efficiency and of course price.
Projection on “invisible” film
Also in this case the 3D effect is limited, turning around the display the image becomes flat. It still offers a fairly realistic effect thanks to the parallax effect compared to background elements. It can be large in size. It is suitable for events, where people are sitting and hardly move around the subject. It allows moving images.
Pyramid projection
It is a horizontal LCD screen above a glass pyramid. It offers a fairly effective 3D image, except in the lines at the junction of the pyramid. There is the limit of size, not suitable for reproducing very large things. There are also small versions that can be used with iPad.
Holographic Helix
It is a propeller that turns very quickly and generates an image that seems to float in the air. here too there is the limit of the viewing angle, which can not be too lateral. The solution is suitable for moving objects, because it accentuates the impression of 3D.
Holographic tablets
These are displays designed for holographic display on tablets, for example those produced in Italy by Real Vision. The Kickstarter project “The Looking Glass” has interesting features.
