NTEGRA Spectra Probe NanoLaboratory. SNOM Measuring Head. Instruction Manual
Fig. 4-5. Image of the laser spot
focused on the sample surface
Aligning the laser beam with the focus of the detection system
1. Go to the Spectra tab in the Main window of the Nova program. This runs the
auxiliary version of the Nova program. All operations on scanning are performed in
the main version of Nova. Select the
Scan (Slave) tab for scanning-by-laser mode.
2. For directing the laser beam to the focus of the detection system, place the marker
of the 2D Viewer (Fig. 4-6 a) at the location corresponding to the mark on the monitor
of the optical viewing system (Fig. 4-6 b). The mark has been made by mark pen on
the monitor of the optical viewing system during fine adjustment of the detection
channel. Watch position of the laser beam on the monitor of the optical viewing
system. The marker of the 2D Viewer will follow the actual position of the mirror
scanner.
a) 2D Viewer
b) Image on the monitor of the optical viewing
system
Fig. 4-6. Viewing mirror scanning
3. Adjust the PMT output as follows:
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