Two Basic Types of Holograms
Folks,
There is one species of moving hologram called spectral imagery.
It works inside a kiosk, a small stage is set and populated with ghost-like
talking moving holographic figures.
The image: Appears 3-dimensional in full color, Stands 6" to 14"
tall, Speaks to the audience while walking around a small stage.
The presentation stage is about 7 feet wide and 3 feet deep. (It
can be larger or smaller, depending on your needs.) On it are placed the props
or products that the spokesperson uses to tell your story.
The two basic types of holograms -- reflection and transmission --
can be distinguished by the way they are illuminated.
Reflection holograms are lit from the front, reflecting the light
to you as you view it.
Transmission holograms are lit from the rear and bend light as it
passes through the hologram to your eyes.
Holograms are usually recorded on film and light is needed to
activate them.
I could not find any references to large moving holograms
projected outside of enclosures. Even Star Trek uses a holodeck. Again, the
viewed hologram is just a ghost-like image of the object and contains no
substance.
Bill Hamilton
by Bill
Hamilton
Executive Director
Skywatch International,
Inc.