RE: Scanline Smear...

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Gullen, Jim (Jim.Gullen++at++GSC.GTE.Com)
Fri, 20 Mar 1998 12:16:27 -0800

The word "saccade" (phonetically "suh-cod") is a rapid and
sometimes involuntary or subconscious movement of the eyes.
Movement can be as much as 40 degrees in 40 milliseconds!
During saccade there is a disconnect of approx. 200 milliseconds
between human optics and idetic (short term) memory. This provides
ample time for a (circa 1983) 600 pound, servoed optics projector
and its image to be repositioned "ahead of" the human.

> ----------
> From: Catherine E. Blanco[SMTP:cblanco++at++world.northgrum.com]
> Sent: Friday, March 20, 1998 10:44 AM
> To: Steve Baker
> Cc: info-performer++at++sgi.com
> Subject: Re: Scanline Smear...
>
> > ... the eye/brain 'edits out' the imagery that you see when
> > your head+eyes pan really quickly - and fills in the gaps from
> memory!
> > There is a proper name for this effect (something like a
> 'circade'??)
>
> I think the word is saccade, and I can't remember where I read about
> it, either, but it is an interesting effect. A quick search for
> 'saccade' in one of the Internet search engines should turn up
> some interesting reading...
>
> ======================================================================
> ====
> Cathy Blanco
> cblanco++at++world.northgrum.com
> Northrop Grumman Advanced Systems & Technology (562)
> 942-3961
>
>
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