Keysight 5500, User Manual, Page: 96 / 330

Preparing for Imaging
5
Keysight 5500 SPM User’s Guide 5-22
Inserting and Aligning the Detector
The photodiode detector records changes in the position of the laser spot
as the cantilever passes over the sample surface. As shown in
Figure 4-23 , the detector senses the movement of the laser spot between
the four quadrants, reporting the AFM (vertical deflection), LFM
(lateral, or friction), and SUM signals.
Figure 4-23 Photodiode detector operation
To install the photodiode detector, insert it into the scanner until it stops
(
Figure 4-24 ). Plug the detector cable into the Detector socket on the