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From: domingo@boulder.colorado.edu (Alberto Domingo)
Newsgroups: comp.graphics
Subject: Re: TIs 3d display
Message-ID: <27652@boulder.Colorado.EDU>
Date: 5 Oct 90 23:28:33 GMT
Sender: news@boulder.Colorado.EDU
Reply-To: domingo@boulder.colorado.edu (Alberto Domingo)
Organization: University of Colorado, Boulder
Lines: 15

In article <1990Oct5.193803.13819@athena.mit.edu> sao@athena.mit.edu (Andy Oakland) writes:
>It's true; I've seen one of these monsters.  Imagine a big (~3')
>spinning disc, punched with holes.  At the top of the disc, a neon (?) 
...
>	:Andy Oakland
>	sao@athena.mit.edu

This device (the disc) is called a Nipokow disc, and it is a very
smart idea for obtaining a 2d scan in both directions. It is also
used (even today) in some special optical microscopy called confocal
and this is the only way to obtain this kind of microscopy in
real time (deflected laser beams are much slower).
Just a short note.

Alberto