Hi Michel,
We use an Epson A5 scanner with transmitting light for slides.
You can put 8 thin sections on it upside down, with the thin section closest to the scanner itself.
After you scanned on high resolution, you cut the different sections out of one image with a photopaint-program.
It is important that you put your lower polarisation filter on top of the 'white-calibration' bar of the scanner, so that the image is automatically in right colours.
Kind regards,
Isaac
-----Original Message-----
From: Tectonics & structural geology discussion list [mailto:[log in to unmask]] On Behalf Of Dr. Jens K. Becker
Sent: 5 november 2009 21:12
To: [log in to unmask]
Subject: Re: scanning of thin section
HI Michel,
You might try to remove the glass from the holder. These scanners
usually have a fixed focus (?) and since your thin section is already
rather thick compared to a slide, this might be the reason for it. I
have seen (and used) several of these things and they always came
without glass in the holder...
If you still have problems, ask Bernd (or Axel) in Göttingen, they might
be able to send you their holder to try...
Jens
On Thu, 2009-11-05 at 11:21 -0400, John Waldron wrote:
> Hello Michel and all
>
>
> We have had most success with a scanner designed for 35 mm slides.
> One of our museum staff devised a thin-section holder that has the
> same external dimensions as a 35 mm slide, into which the thin section
> and two polaroid films can be fitted. The whole thing drops in to a
> Nikon slide scanner which has autofocus capability. It does 4000 dpi
> (dots per inch) and produces excellent results.
>
>
> See examples at http://cms.eas.ualberta.ca/dif/?q=node/6
>
>
> John Waldron
>
> On 2009-Nov-05, at 10:56 AM, Michel Bestmann wrote:
>
> > Hello all,
> >
> > Who has experience with scanning of thin sections with polarisation
> > foil? I used a HP Scanjet G4050 in the slide modus. However the
> > results are not convincing. I have tested several positions of the
> > thin section surface with respect to the glass of the scanner. The
> > images are always slightly out of focus.
> >
> > Cheers
> > Michel
> >
> >
> >
> > -------------------------------------------------------------------------------------------------------------------
> >
> > Michel Bestmann Phone: +49 (0)9131-8529026
> > GeoZentrum Nordbayern (0)9131-627448
> > University Erlangen-Nuremberg mobile +49 (0)176 24828586
> > Schlossgarten 5
> > D-91054 Erlangen
> > Germany
> >
> > Email: [log in to unmask]
> >
> > web-page:
> > http://www.elektron-performance.de.vu
> >
> > SAHARA GEO-EXPLORER
> > http://www.sahara-geoexplorer.de
> >
> > -------------------------------------------------------------------------------------------------------------------
> >
> >
>
> -------------------------------------------------------------
> John Waldron Ph.D., Dept. Earth & Atmospheric Sciences, 1-26 Earth
> Sciences Bldg, Univ. of Alberta, Edmonton, AB Canada T6G 2E3
> On sabbatical leave 2009-10: Apt. #305 1326 Lwr. Water St. Halifax NS
> B3J3R3 Tel: 902 423 1281. email: [log in to unmask]
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