So I just realised that 3d hologram fan projectors are now a thing, and the quality looks quite good (search Ashata 3d hologram fan projector). However, an inherent problem with them is that the image must be viewed at a perpendicular angle to the fan for the image to be visible, meaning they can only be viewed from one side like a tv or projector screen.
I was wondering, theoretically, if one was placed at the bottom of a sufficiently sized mirascope, would this create a hologram that could be viewed from all angles?
Potential problems that come to mind:
would the lack of a tangible 3d surface within the mirascope mean the effect isnt created?
would the vertical direction of the LED beams from the fan mean light isnt sufficiently dispersed within the mirascope chamber to create a full image above?