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.
