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Appendix |Multilayer Measurement, Controller IFC24x1MP
confocalDT 24x1
A 4
Multilayer Measurement, Controller IFC24x1MP
A 4.1
User Interface
A 4.1.1 General, Settings / Measuring Program
When measuring through transparent
layers, each boundary area between
two materials with a visually different
density will reflect a part of the light.
As refraction of the rays varies, all
materials (refractive index) must be
known.
To safely separate peaks within the
video signal, the individual layers must
not be too thin in relation to the measu-
ring range (guide value: minimum
layer thickness > approx. 10 % of the
measuring range, does not apply to
miniature and hybrid sensors).
All peaks must be within the measuring
range to ensure that thickness can be
calculated correctly.
Fig. 75 Example of a measurement
task: Number of expected peaks: in this
instance 3 (possible maximum of 6)
Peak 1
Peak 2
Peak 3
Glass
Air
Metal
To be measured
Define materials: here refractive correction of BK7 between peaks 1 and 2 plus vacuum
between peaks 2 and 3.
