sane-project-website/old-archive/2001-02/0040.html

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<H1>Re: transparancy lighting</H1>
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<STRONG>From:</STRONG> Bjoern Brill (<A HREF="mailto:brill@samson.math.uni-frankfurt.de?Subject=Re:%20transparancy%20lighting&In-Reply-To=&lt;Pine.LNX.4.05.10102061610460.24617-100000@samson.math.uni-frankfurt.de&gt;"><EM>brill@samson.math.uni-frankfurt.de</EM></A>)<BR>
<STRONG>Date:</STRONG> Tue Feb 06 2001 - 07:29:01 PST
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On Tue, 6 Feb 2001, FJA van Zijp wrote:
<BR>
<P><EM>&gt;
</EM><BR>
<EM>&gt; Hi,
</EM><BR>
<EM>&gt;
</EM><BR>
<EM>&gt; With my Mustek now working, does anyone have an idea on what
</EM><BR>
<EM>&gt; works as a lighting source to scan transparent things like slides and
</EM><BR>
<EM>&gt; overhead sheets?
</EM><BR>
<EM>&gt;
</EM><BR>
<P>I use Musteks &quot;TA IV&quot; transparency adaptor with a 12000 SP+. Slides need
<BR>
some gamma correction, overhead sheets are OK without.
<BR>
<P>In germany, it is sold for around DM 140,- by e.g. ATELCO - see
<BR>
&lt;<A HREF="http://www.atelco.de">http://www.atelco.de</A>&gt;. You could ask Musteks email support about
<BR>
retailers and pricing in NL - they're generally helpful wrt this kind of
<BR>
questions.
<BR>
<P><EM>&gt; Do I build a box with a few neon tubes and a 'milky' glass bottom,
</EM><BR>
<EM>&gt; which I place on the scanner?
</EM><BR>
<EM>&gt;
</EM><BR>
In principle, the TA IV isn't that much different from what you describe
<BR>
and you could certainly try to build something like that yourself.
<BR>
Problems:
<BR>
- Would it be cheaper ?
<BR>
- The right colour and intensity of the light is critical.
<BR>
- Homogenity of the lighting is even more critical.
<BR>
- Usual neon tubes flicker with 50Hz frequency, this could (?) cause
<BR>
&nbsp;&nbsp;horizontal stripes in the scan. You may have to use a lighting source
<BR>
&nbsp;&nbsp;powered by DC, not AC.
<BR>
<P><P>Regards,
<BR>
<P>Bjoern
<BR>
<PRE>
--
Bj&quot;orn Brill &lt;<A HREF="mailto:brill@fs.math.uni-frankfurt.de?Subject=Re:%20transparancy%20lighting&In-Reply-To=&lt;Pine.LNX.4.05.10102061610460.24617-100000@samson.math.uni-frankfurt.de&gt;">brill@fs.math.uni-frankfurt.de</A>&gt;
Frankfurt am Main, Germany
<P><P><P>--
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