Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site lasspvax.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!vax135!cornell!lasspvax!langer
From: langer@lasspvax.UUCP (Stephen Langer)
Newsgroups: net.sci,net.rec.photo
Subject: Re: 3D picture on cover of National Geographic
Message-ID: <717@lasspvax.UUCP>
Date: Tue, 26-Nov-85 21:05:19 EST
Article-I.D.: lasspvax.717
Posted: Tue Nov 26 21:05:19 1985
Date-Received: Thu, 28-Nov-85 08:04:44 EST
References: <547@scirtp.UUCP> <435@nicmad.UUCP>
Reply-To: langer@lasspvax.UUCP (Stephen Langer)
Distribution: net
Organization: LASSP, Cornell University
Lines: 34
Xref: watmath net.sci:480 net.rec.photo:1647
Summary: 

In article <435@nicmad.UUCP> brown@nicmad.UUCP (Mr. Video) writes:
>In article <547@scirtp.UUCP> ned@scirtp.UUCP (Ned Robie) writes:
>
>[author asks how recent 3D National Geopgraphic cover (skull) was created]
>
>Suggested reading: National Geographic, March 1984, page 372
>
>In it a complete discussion of how their first cover, an eagle, was done.
>-- 

As I recall, the article in the March 84 issue contained an awful lot
of what is known in the trade as "hand waving". The trouble with
"scientific" explanations in popular journals is that in order to
reach a wide audience, the author has to leave out everything he doesn't
think everyone will understand. (Sometimes, what's worse, is that the
author includes stuff that he/she doesn't understand. This is not necessarily
the author's fault, I know.)
  Anyhow, does anyone out there really know how the flat reflection
holograms work? I would like to know too.

-- 

            0))
       ((0       0
           __    
         <|..|>  :0_
      _0:  \/   /
        \   \  /
         ---||-
            ||         Steve Langer
            /\         Physics Department, Clark Hall
           /  \        Cornell University
         _\    \_	     Ithaca, NY 14853
       {ihnp4,decvax,allegra,vax135}!cornell!lasspvax!langer