The convert Y-Axis
command recalculates the intensity values of IR, NIR, RAMAN or UV/VIS
spectra and corresponding 3D data and converts the values into one of
the following units:
Popular unit with NIR spectra.
Spectra with raw intensity units (e.g. energy or counts) may also be
converted to transmittance or absorbance if a corresponding reference
spectrum is available. The convert Y-Axis command offers an option to
load a reference spectrum if the source spectrum is in a suitable format.
Please review the section convert
Y-axis unit in the chapter commands for further information.
By subsequent application of the command, the units will be toggled.
The ratio of transmitted energy to the amount of incident energy is
called transmittance. Transmittance was formerly called transmission.
Transmittance values can be easily derived from the formulas given above.
For some applications in optics it might be useful to see transmittance
values as percent transmittance values. All intensities will be scaled
to fit an interval between 0 and 100 percent transmittance.