The Offset Adjustment Control allows the user to adjust the calibration of the instrument. We shall dene two types of
offset. A detector offset and a grating offset.
The Detector offset value can be adjusted to correct for any mechanical change that shifts (offsets) the displayed
spectrum from the expected calibrated position. For example, if a camera is removed and retted, or a grating turret
is removed and retted there will most likely be a small mechanical non-repeatability in the exact re-positioning of the
component. Any offset introduced will be ‘global’, i.e. any offset (measured in pixels) will be independent of the grating
being used. The grating offset values are also used to correct for any shift between the displayed spectrum from the
expected calibrated position.
Auto-Adjust
If you move to a known line of your calibration lamp, e.g. 435.83nm, and the spectral line is slightly to the side, you can
press the ‘Auto Adjust’ offset button for Solis to handle the iterative process of centering the line.
Note: The grating offsets are not global in that they are only applied to the respective gratings.
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