Re: Unbelievable Marketing Hype (Was: UMax 1220S)

Matto Marjanovic (maddog@mir.com)
Sun, 21 Jun 1998 12:53:17 -0400 (EDT)

From: becka@rz.uni-duesseldorf.de
Date: Sun, 21 Jun 1998 12:13:54 +0200 (MET DST)
...
Visible light ranges at around 400-700nm. Let's have a look at the
red component (longest wavelength) and assume we look at a bright red
at 620nm.

Now there is a simple calculation:

MaxDPI = 1 Inch / MinimumDotSize

MaxDPI = 25.4 mm / 620nm = 25.4e-3 / 620e-9 = 25.4/620 * 1e+6 = 40968.

That means the marketing folks have only two numbers left, if they don't
want to advertise beyond physical limits of real achieveable resolution :
19200 and 38400 (assuming they keep going up in *2 increments).

Cool! So then, if my lowly E6 were advertized to do 40968 dpi scans,
I could use it to copy CD's!!!

(Although, due to the interpolation, the audio would be automatically
downsampled to 6kHz instead of 44.1kHz -- oh, well. :)

-matt m.

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