[NeXus-tech] Dectris Geometry Documentation

[Koennecke Mark (PSI)]

Hi,

I do not know if you have seen the attached document. I have a few annotations:

WE set the origin of the detector coordinate system to the upper left corner….

Actually, NeXus never defined that, I checked NXdetector and our design documentation.
I think with the CIF style coordinate frame it does not really matter but I want to point out that
we may be standardizing something here which is quite important.

Then the discussion appears overly complex to me. I think the detector coordinate system can
be described by

x_translation
   @vector -1,0,0
   @offset ….
y_translation
   @vector 0,-1,0
   @offset …
   @depends_on x_translation

It is just a simpler way of looking at this, Herbert comes to the same result by using a rotation around z of PI

Regards,

     Mark


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