The spectrum’s Data tab displays all the spectrum data of the current analysis.


An analysis can have many spectrum scan steps, each one having many positions defined for many substances. The Overview section displays a tree allowing to select a step, a substance or a position to display its spectrum data. When selecting a step or a substance, you can further show or hide each position by using the corresponding toggle buttons.


Spectrum Scan View


The spectrum scan view displays the data of the spectrum positions selected in the Overview section. The spectrums themselves are displayed by a modified version of the Profiles viewer, which displays the wavelength (instead of the Rf) as the red axis. The main view mode is set to Profile by default because this makes more sense than a 3D mode, but it has the same 3D capabilities as the regular Profiles viewer.

When enabled in the scanner step, the Purity section allows you to show/hide the additionally measured spectrums, and a table shows the results of the correlation computed between the start and the middle spectrums r(s;m) and between the middle and the end spectrums r(e;m).

The Correlation allows you to define correlation between spectrum position’s data. When set, visionCATS searches by default, for each position, the nearest position defined on a reference track and sets this position as the Reference spectrum. You can then manually adjust each reference spectrum if needed.


The r(s;m), r(e;m) and Correlation values are computed by using the sample Pearson correlation coefficient.