Evaluate the drift in magnification over time:
We scanned a 288 nm pitch calibration standard and
analyzed the results using Calibrator Pro™. This graph shows
that the apparent magnification drifted upward before recalibration. For 10
months after recalibration, the magnification was nearly constant. The standard
error of mean was about 0.8 nm.
Interestingly, the standard deviation was approximately
constant over the same time interval:
