From: Calvin Grier (cgrier_at_ix.netcom.com)
Date: Tue Jun 01 2004 - 05:55:18 PDT
Jim,
Thanks for mentioning the touchscreens from www.adago.net. The touchscreen
we sell is less prone to Newton's Rings than the apple original due to the
way it is made. However, neither one is "supposed" to show this particular
phenomena which is due to the small air gap between touchscreen layers. This
air-gap is near enough to 1/2 or 1/4 wavelength of visibile light that
various wavelengths get canceled out due to reflections at the glass
boundary.
I think it is a great irony that this is seen on Apple's Newton products.
----- Original Message -----
From: "Jim Witte" <jswitte_at_bloomington.in.us>
To: <newtontalk_at_newtontalk.net>
Sent: Monday, May 31, 2004 6:58 PM
Subject: Re: [NTLK] 2100 bubbles
> In the case of the Newton, the film is the touch screen itself (I
> think). They are more pronounced in florescent light (I don't see them
> at *all* in sunlight) because florescent light has a pronounced
> spectral component somewhere around green I think (of course we don't
> see that because our eyes do automatic white-balancing ;-). I don't
> know exactly *why* that frequency causes them to show up more.
>
> Calvin Grier's touchscreen replacement may not have this problem -
> I'm not sure.
>
> Jim Witte
> jswitte_at_bloomington.in.us
> Indiana University CS
>
> --
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> Official Newton FAQ: http://www.chuma.org/newton/faq/
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http://tools.unna.org/wikiwikinewt/
>
-- This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries Official Newton FAQ: http://www.chuma.org/newton/faq/ WikiWikiNewt for all kinds of articles: http://tools.unna.org/wikiwikinewt/
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