Ch. 4. Tutorial: AC Mode in Air, Std. Scanner Sec. 4.4. Imaging
Moving the Sample Between Scans:
• Sometimes, it is desirable to move to another point of interest after some scans have been taken.
For features within 12.5 microns, use the X Offset and Y Offset fields. Note that a negative is to
the left or below the initial area.
• For features that are further away, use the arrows toward the edges of the Video Panel. The single
arrows are slow, and the double arrows are fast. It is also possible to click and hold the double
arrows for faster, continuous movement. See
Figure 4.5 on page 46 for an example of sample
movement.
Note These buttons move the sample rather than the cantilever, and so the laser and objective stay in
alignment. Be sure to avoid accidentally moving the tip, and remember that the smaller arrow buttons
in the upper left hand corner of the Video Panel are set to the cantilever rather than to the sample.
Q When I make changes to scanning parameters, when do those changes take effect in the scanned
image?
A Most parameters in the main tab of the main panel (See 1) will update as soon as you make a
change. Note that changing points, lines, or scan rate, will tak effect next frame.
If you check the ‘Delay Update’ box just above the ‘Setpoint’ parameter, then any changes you
make to parameters above that box will only update next frame. Until the image is complete,
the changed variables are highlighted in blue.
You can always force a new image by clicking ‘Frame Up’ or ‘Frame Down’. A nice way to see
the effect of changing imaging parameters can be as follows:
• Check the ‘Delay Update’ box as described above.
• Click ‘Frame Up’ and collect a dozen scan lines. Observe the image quality
• Make some changes to the scan parameters (number of points, rate, gains, setpoint).
• Click ‘Frame Up’ again.
• Observe as the exact same scan region is ”painted over” with new data taken with your new
parameter choices.
4.4.3. Image Refinement
To learn more about using the Asylum Research SPM software to refine your imaging parameters, please
refer to Applications Guide, Chapter: AC Mode Imaging in Air and also MFP-3D User Guide, Chapter:
Tutorial: AC Mode Imaging in Air. Also consider watching this introductory video: AC Mode Imaging
in Air
(requires an internet connection).
support.asylumresearch.com Page 45
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