The basic princple of a special optical plate called ASKA3D-plate, which can display the image in mid-air.

The holographic images you see are not VR images or optical illusions.
They are actual videos and objects projected in midair.
You can even use a magnifying glass to enlarge them.
Moreover, this technology does not use the focus technique,
which allows you to move the images back and forth when displaying them.
ASKA3D does not require any complicated equipment. All you need is an ASKA3D-Plate.
You can also project videos in vehicles and similar bright locations.

(2023, July 27). Haruki Matsuwaki – Sales Representative, ASUKANET.CO., LTD. Retrieved from https://xchange.avixa.org/posts/introducing-aska3d-holographic-display?channel_id=business-of-av