I have another question. Many, many years ago I saw a demo on
tv. The person had a large rotating disk with black and white spirals on
it. If you stared in the center of the spiral and looked at a picture,
the picture appeared to become 3-D. I've heard of people using the same
demo and had the people stare at each others' faces. The people's face
appeared to expand or shrink.
Does anyone know the name of this device? Is there a web page
that shows the design of the disk and the rate at which it should spin?