Jinx wrote:
>
> > Hi Olin, I once saw a design for a 3D display,
> > they had a vertical clear plastic panel, rotated
> > vertically, then projected a scanned laser onto
> > it from the side...
>
> A few years ago I saw an idea (very enthusiastically presented)
> to create 3D images. Imagine a perspex cylinder about 40cm
> diameter and about 50cm high. Inside it, central and vertical,
> was a reflective helix, one complete 360 degree twist, that
> reflected images projected from the bottom of the cylinder. As
> the helix turned, the edges of it rose and so the image was
> scanned onto the perspex. Although it looked good on 2D TV,
> that's another idea that seems to have risen without trace


I like that idea a lot! :o)
You need to spin the helix and the laser, with
one laser axis, (surplus laser printer engine?)
or rig a 2d laser scanner with a spinning helix.

What did you think about the spinning panel of
leds? It might be low-res but could provide a
simply constructed way of doing this...
-Roman

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