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companies. Any rights not expressly granted herein are reserved. ATTENTION: Specifications and technical data are subject
to change without notice.
Delay Per Data Point:
0s
Start the calibration.
The upper figure shows the calibration window and the oscillation amplitude
(AFM Aosc) of the cantilever as a function of the excitation frequency. From
this resonance curve, f
res
can be selected with the help of the
frequency
selection
tool. Press the ok button (green checkmark) to set the chosen
frequency as the excitation frequency. It is also possible to zoom in by using
the
frequency range selection
tool.
It is possible to extract the oscillation amplitude A of the cantilever from the
resonance curve with help of the calibration of the interference signal:
A =
/2
*V/
V with V being the photo detector signal at resonance and
V being the peak-peak amplitude of the interference
signal.
The amplitude A is typically chosen to be within 20 nm to 100 nm.
Besides the the oscillation frequency of the resonance, the Full Width at Half
Maximum (FWHM) can also be deduced from the resonance curve which
allows calculating the cantilever’s Q factor, Q = f
res
/FWHM.
Содержание attoAFM I
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