view article
Figure 5
Measuring real-space movement due to rotation. (a) Parts of ptychographic reconstructions, such as in Fig. 3[link](f). The + sign indicates the reference point. In the direction across the nanowire, this point was calculated from the average of the intensity summed along the nanowire axis. In the direction along the nanowire axis, this point was the half-maximum of the slope at the tip. The horizontal coordinate is the motor position. The scan ranges were adapted to the systematic movement of 7.5 µm per degree. (b) Part of a ptychographic reconstruction, taken at a relative rotation around the z axis of +0.15°, compared with (a). Here, the × sign indicates the reference point calculated from this image. The + sign indicates the expected position of this reference point, calculated from the systematic shift in the y direction. (c) Remaining shift of the reference point versus relative rotation, after correction for systematic movement. This is the distance between the measured (`×') and expected (`+') positions of the reference points, as in (b).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 48| Part 6| December 2015| Pages 1818-1826
doi:10.1107/S1600576715017975
Follow J. Appl. Cryst.
Sign up for e-alerts
E-alerts
Follow J. Appl. Cryst. on Twitter
Twitter
Follow us on facebook
Facebook
Sign up for RSS feeds
RSS