[visionlist] Stimulus presentation in MEG-chamber
maxe at psy.uni-muenster.de
Fri Nov 9 09:35:40 GMT 2007
we're planning to improve stimulus presentation possibilities in our
MEG-lab, mainly concerning temporal and chromatic accuracy. So far,
we're using the common mirrored image of a video beamer, projected on
the back of a semi-transparent screen. We would like to compare three
options and if you have any opinion about, or experience with one of
them, we would be happy to hear!
>>> Option 1. A better projector
Projectiondesign (www.projectiondesign.com) seems to manufacture
projectors that overcome a lot of typical problems. Does anyone use
these projectors? We would be especially interested in the following
- manual color callibration > given a standard graphic card, do you
really get "true" i.e. achromatic grey values?
- refresh rate > is it possible to run 1024 x 768 px at 100Hz? I've
e-mailed the company but have not received any answer so far
- aspheric lense > as far as I understand it, this prevents that the
image is sharp in the center but blurred in the periphery. Does it work?
Of course, if you have had good experience with other projectors, we
would be happy to know.
>>> Option 2. Two video beamers with a shutter device
a) Is there a shutter you could recommend? How much would that be?
b) Do you use commercial software to control the two beamers and
>>> Option 3. Has anyone tried to run a TFT-screen in the MEG-chamber?
Putting the power supply outside the chamber would reduce most of the
electromegnetical interferences, wouldn't it? But there are surely more
problems conntected to it. Any comments would be extremely welcome!
Thanks a lot in advance,
Institute for Biomagnetism and Biosignalanalysis
University of Muenster
E-Mail: Maximilian.Bruchmann at uni-muenster.de
Dipl. Psych. Maximilian Bruchmann
Westfälische Wilhelms-Universität Münster
Psychologisches Institut III
Tel: +49 251 83-34136
Achtung: Die E-Mail-Adresse Maximilian.Bruchmann at psy.uni-muenster.de ist
nur noch bis September 2007 gültig.
Benutzen Sie bitte die Absenderadresse Maximilian.Bruchmann at uni-muenster.de.
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