FLIC Server for 4 oxides
The applet below fits from the data of a precalculated optical setup cell substrate distances.

Choose your setup, type in the 4 fluorescence intensities, their variation sigma, the corresponding oxide thicknesses and their average variation, a starting value for the distance fit and press "Fit the distance". You will get the distance and its error from the FLIC Server. Look at the fitted plot [fluorescence intensity vs. oxide thickness] with "Show Graph". To copy the ploted data into the clipboard, press "Copy Graph Data".

[when the applet doesn't work correctly...]

Have a look at the systematic error and at the measurement of ghosts.

See also the FLIC Server professional