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From: thomas@utah-gr.UUCP (Spencer W. Thomas)
Newsgroups: net.graphics
Subject: Re: holography
Message-ID: <1415@utah-gr.UUCP>
Date: Tue, 16-Apr-85 12:14:46 EST
Article-I.D.: utah-gr.1415
Posted: Tue Apr 16 12:14:46 1985
Date-Received: Thu, 18-Apr-85 08:15:47 EST
References: <7931@rochester.UUCP> <728@turtlevax.UUCP>
Reply-To: thomas@utah-gr.UUCP (Spencer W. Thomas)
Distribution: net
Organization: Univ of Utah CS Dept
Lines: 22
Summary: 

In article <728@turtlevax.UUCP> ken@turtlevax.UUCP (Ken Turkowski) writes:
>Last year Cray research displayed a computer generated hologram at SIGGRAPH.
>Your might want to contact them for info on hologram production and product
>literature.

I think that this hologram was actually a "strip hologram".  That is, a
number of tall, skinny holograms were made of essentially 2d scenes,
then these were placed next to each other to get the 3d effect.  Since
each hologram is tall and skinny, there is no 3d effect from an
individual strip, but the stereo effect caused by each eye looking
through a different strip causes the 3d appearance of the image.  The
acid test here would be to see if you get different points of view by
moving your head up and down.

I could, of course, be wrong about this, and I would be much more
impressed by the hologram if I were.  My impression when I saw it last
summer, however, was that it was a strip hologram.

-- 
=Spencer   ({ihnp4,decvax}!utah-cs!thomas, thomas@utah-cs.ARPA)
	"Controversy equalizes fools and wise men in the same way
	 -- *and the fools know it*." -- Oliver Wendell Holmes