CBF/imgCIF Extensions Dictionary

Draft version 1.5 for comment

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Image dictionary (imgCIF) version 1.5.4




       The value of _diffrn_detector_element.reference_center_fast is
              the fast index axis beam center position relative to the detector
              element face in the units specified in the data item
              '_diffrn_detector_element.reference_center_units' along the fast
              axis of the detector from the center of the first pixel to
              the point at which the Z-axis (which should be colinear with the
              beam) intersects the face of the detector, if in fact is does.
              At the time of the measurement all settings of the detector
              positioner should be at their reference settings.  If more than
              one reference setting has been used the value given whould be
              representive of the beam center as determined from the ensemble
              of settings.

              It is important to note that for measurements in millimetres,
              the sense of the axis is used, rather than the sign of the
              pixel-to-pixel increments.

Type: float

Mandatory item: no

Category: diffrn_detector_element

HTML version of draft dictionary created by modified version of makedicthtml by B. McMahon from modified version of imgCIF dcitionary 1.3.2 which is subject to the following copyright: