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Operation
Spectrum software enables you to mark points of interest on the sample. You can collect
individual spectra (either at the current aperture position or at positions you have marked)
with or without an ATR objective. You can also collect spectra at regularly spaced intervals
along a line or within a marked area.
For further information, see the Spectrum on-screen help.
The table below lists the modes of operation that should be used for particular samples.
Transmittance
Single areas of thin solids, fibers and films. The optimal aperture
range depends upon the detector type, as follows:
MCT detector: Between 10 µm and 100 µm.
DTGS detector: Between 50 µm and 200 µm.
InGaAs detector: Between 10 µm and 200 µm.
Reflectance
Single areas of coatings and thick solids. The optimal aperture
range depends upon the detector type, as follows:
MCT detector: Between 10 µm and 100 µm.
DTGS detector: Between 50 µm and 200 µm.
InGaAs detector: Between 10 µm and 200 µm.
With ATR objective
Thick, non-reflecting samples.
NOTE: In general, the larger the aperture setting, the better the spectral quality. Sample
sizes may be larger than the maximum aperture sizes given in the table above.
Overview of the Spotlight 200 . 33
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