Instruction manual

Calibration, Maintenance, Troubleshooting and Warranty

Linearity Correction Procedure

284 MultiMode SPM Instruction Manual Rev. B

3. Click OK to exit the Scanner Calibration panel

4. Capture another image and re-measure the angle.

5. Repeat correction of Orthogonality until the scanned image shows less than 0.5º of error.

Note: After a major change to the orthogonality parameter, you may need to

physically realign the calibration standard to the image frame.

15.4 Linearity Correction Procedure

For applications which demand good linearity, the following procedure can be used to optimize the

linearity correction parameters for individual scanners. As discussed previously, linearity correction

is especially important for long-range scanners.

15.4.1 Adjust Mag0 and Arg

1. Select Microscope > Calibrate > Scanner to display the Scanner Calibration dialog box.

2. Set the mag0 and arg values while noting the scan beginning and ending.

Note: When Line direction is set to Trace, the beginning of the fast scan is on the

left, as indicated by the arrow base. Because the display monitor screen itself is

not linear, use the Realtime Zoom box to check mag0 and arg.

Note: When viewing up or down scans, check the image against itself, not the

residual image from the previous scan. Be careful to compare only the part of

the scan drawn since the last parameter change.