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Question 1: What kind of layers can I
measure using TranSpec?
In principle all kind of transparent and in most cases
also semi-transparent layers of any kind of organic material (e.g. lacquers
and plastic foils), as well as inorganic material (e.g. aluminum
oxide). The type of substrate does not matter herein. Also, the layer can be
liquid as well. However, metallic layers or layers with a highly
concentrated pigment content cannot be measured by TranSpec.
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Question 2:
Is it possible to determine multi-layers with TranSpec?
The TranSpec film thickness gauge permits to
simultaneously determine the film thickness of a double-layer system from
just one measurement. However, the refraction index of both layers to be
determined must be different.
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Question
3: Does TranSpec need to be calibrated on a thickness standard?
No, the TranSpec gauges do measure the film thickness
as an absolute value. However, the refraction index of the layer to be
determined must be known (see also Question 4).
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Question 4:
What general layer properties do I need to know?
Only the refraction index of the layer to be determined
must be known.
By default, TranSpec measures the so-called "Optical Thickness" (OT).
From that the required "Physical Thickness" (PT) is computed by
use of the refraction index (RI) as follows: PT = OT / RI
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Question 5:
How big is the measurement spot size?
The measurement spot has a size of typically a few square
millimeters, which results of the distance of the bifurcated fiber optics
cable to the sample.
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Question 6:
What kind of maintenance work is required?
Pretty much none at all. The TranSpec-DSP spectrometer is
free-of-maintenance, however, the halogen bulb of the HSL-2 spectral lamp
has to replaced every other 3 months (which is described accordingly in the
HSL-2 user's manual). The same applies for the FTM-Lite film
thickness gauge.
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Question
7: What's the difference between FTM-Lite and TranSpec-DSP?
In general the TranSpec-DSP
thickness gauges are made especially for in-line measurement tasks and thus
provide several TTL and D/A output signals, which can be used for current
loop controls connected to a MIS. The FTM-Lite thickness gauges are made for
lab use and therefore do not
offer TTL or D/A output.
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