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Figure 2
Compact Hartmann sensor: a reference spot pattern is created by diffraction from a 5 µm pinhole. For alignment purposes, one pinhole (Fiducial mark) bottom right on the Hartmann plate shows a distinct size and shape. It defines the sensor orientation and helps with the identification of individual sub-apertures.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 23| Part 1| January 2016| Pages 43-49
doi:10.1107/S1600577515020354
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