Agilent Technologies E5500 Series Guide de l'utilisateur Page 40

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Agilent 5500 SPM Components 2
Agilent 5500 SPM User’s Guide 40
Detector
The photodiode detector receives the reflection of the laser spot off the
back of the cantilever. The top and bottom halves of the detector
monitor the cantilever deflection (the Deflection signal) for AFM
imaging, while the two side halves report cantilever twisting (the
Friction signal) for lateral force imaging.
The detector mounts in the scanner, typically while the scanner is on the
microscope.Two thumbwheels on the detector enable alignment in both
directions. There are also four DIP switches to increase or decrease the
gain of the signal from the detector.
Figure 15 Detector assembly, top and bottom views
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