From: yanek@mthvax.cs.miami.edu (Yanek Martinson)
Subject: Re: images out of thin air
Date: 18 Nov 91 05:19:59 GMT
Message-ID: <kiejbvINNshs@mthvax.cs.miami.edu>
Organization: University of Miami Department of Mathematics & Computer Science


brucec@phoebus.labs.tek.com (Bruce Cohen) writes:

>(Yanek Martinson) writes:
>
>> I have seen a fairly simple device of two concave (hyperbolic?) mirrors,
>> one with a hole in it, that project an image of a small object inside to
>> above the mirrors. The image appears entirely real, it can be viewed
>
>If this is the system I am thinking about, one of the mirrors is
>actually a thin piece of silvered plastic which effectively forms the
>cone of a speaker.  The speaker magnet drives the cone with a waveform

No this could not be it. The one I am talking about has no moving parts
or anything. Just two saucer-like mirrors, placed on top of each other
(with reflecting surfaces facing each other); the top one has a hole in
it. Anything placed between the two objects appears to float in the
mid-air about an inch above the top mirror.

>As the mirror scans, it puts the position of the virtual image of the
>CRT phospor at different Z positions in space, so the effect is of a 3
>dimensional scanning system.

This sounds interesting. For computer-generated 3-d images. Does
anybody have any references about it?

yanek@mthvax.cs.miami.edu
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