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Cyhist Mar 09 1997 C
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Date: Sun, 9 Mar 1997 08:34:53 -0800
Reply-To: "CYHIST Community Memory: Discussion list on the History of
Cyberspace" <CYHIST@MAELSTROM.STJOHNS.EDU> Sender: "CYHIST Community Memory: Discussion list on the History of
Cyberspace" <CYHIST@MAELSTROM.STJOHNS.EDU> From: Josh Hodas <hodas@MUDDCS.CS.HMC.EDU>
Subject: Re: CYHIST Digest - 7 Mar 1997 to 8 Mar 1997
In-Reply-To: <199703090517.VAA03201@muddcs.cs.hmc.edu> MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
______________________________________________________________________
Community Memory: Discussion List on the History of Cyberspace ______________________________________________________________________
On Sat, 8 Mar 1997, Bob Bickford wrote:
>Subject: Re: 3-D display -- NOT!
>
>Ben Tanen wrote:
>>Hi folks. I am interested in the earliest mention anyone can find of a three-dimensional display: anything involving an image-producing device for each eye with some way of making them combine using parallax, polarized light, etc. would do.
>
>This is not a "3-D display". What you've described is a *stereoscopic* display system. There is a _huge_ difference. A true 3-D display would have the characteristic that you could move your head and/or walk around it to see more information. Even those sterescopic display systems that react to head movements and change the picture are nearly worthless to that five to eight percent of the sighted population that does not posess sterescopic vision. (Although some of the helmet displays remain fairly convincing even if you're only using one eye.) A true 3-D display system would probably involve some kind of solid hologram, and as far as I'm aware nobody has yet built one.
Many years ago (don't have the issue handy) there was an article in Byte about a 3-D display that consisted of a 2-D grid of LEDs that was spun at high rate while the individual LEDs were turned on and off appropriately. Persistence of vision yielded a fairly convincing glowing 3-D mass.
I never heard anything about it again until I was at Macworld 96 (or was it 95) in San Fransisco and came across it in a booth. It was quite cool though fairly low resolution and monochrome. I will see if I can fish out the brochure when I'm in the office.
Anyone else remember this device?
Josh Hodas
Department of Computer Science
Harvey Mudd College
______________________________________________________________________
Reply-To: "CYHIST Community Memory: Discussion list on the History of
Cyberspace" <CYHIST@MAELSTROM.STJOHNS.EDU> Sender: "CYHIST Community Memory: Discussion list on the History of
Cyberspace" <CYHIST@MAELSTROM.STJOHNS.EDU> From: Josh Hodas <hodas@MUDDCS.CS.HMC.EDU>
Subject: Re: CYHIST Digest - 7 Mar 1997 to 8 Mar 1997
In-Reply-To: <199703090517.VAA03201@muddcs.cs.hmc.edu> MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
______________________________________________________________________
Community Memory: Discussion List on the History of Cyberspace ______________________________________________________________________
On Sat, 8 Mar 1997, Bob Bickford wrote:
>Subject: Re: 3-D display -- NOT!
>
>Ben Tanen wrote:
>>Hi folks. I am interested in the earliest mention anyone can find of a three-dimensional display: anything involving an image-producing device for each eye with some way of making them combine using parallax, polarized light, etc. would do.
>
>This is not a "3-D display". What you've described is a *stereoscopic* display system. There is a _huge_ difference. A true 3-D display would have the characteristic that you could move your head and/or walk around it to see more information. Even those sterescopic display systems that react to head movements and change the picture are nearly worthless to that five to eight percent of the sighted population that does not posess sterescopic vision. (Although some of the helmet displays remain fairly convincing even if you're only using one eye.) A true 3-D display system would probably involve some kind of solid hologram, and as far as I'm aware nobody has yet built one.
Many years ago (don't have the issue handy) there was an article in Byte about a 3-D display that consisted of a 2-D grid of LEDs that was spun at high rate while the individual LEDs were turned on and off appropriately. Persistence of vision yielded a fairly convincing glowing 3-D mass.
I never heard anything about it again until I was at Macworld 96 (or was it 95) in San Fransisco and came across it in a booth. It was quite cool though fairly low resolution and monochrome. I will see if I can fish out the brochure when I'm in the office.
Anyone else remember this device?
Josh Hodas
Department of Computer Science
Harvey Mudd College
______________________________________________________________________
