There is a new option to stop a parameter fit: You can set a maximum number of iterations (i.e. re-computations of the optical model).
This option allows to define a reproducable fit quality, independent of the computer speed and workload given by other processes.
Before you set the maximum you must figure out how many iterations are sufficient to reach your goals, probably adding some extra iterations for tough fit situations.
Narrow interference fringes of thick layers can be used to determine the refractive index of the sample if the mechanical thickness of the layer is known. The new optical function ‘refractive index from fringes’ provides this functionality, analyzing interference maxima.
Spectra must be provided in wavenumbers. The function requires 5 parameters:
The following example shows how to write a function call:
R (refractive index from fringes 2800 2900 0.2 2.5 754)
The list of special computations offers a new object which lets you fit a polynome to an imported set of data points.
The batch control window can now save its content as a template for future work. Use the local menu commands Actions/Save current content as template and Actions/Load template to save and load the tables. A file called batch_control_template.xlsx in the user application directory is used to store the template.
Objects of type ‘colorbox’ and related special computaton objects could not be edited any more. This has been fixed today.
View elements of type ‘Lines’ had a problem with a blank following another blank in the text: A line break was generated and one character of the next word was missing. This has been fixed.
You can now export the computed average spectrum to an object in the list of spectra. The property dialog allows to specify the name of the receiving object.
If a name of an existing spectrum object is defined, the average spectrum will be copied to the field ‘experiment’ – as if it were a measured spectrum. This way you can compute integral quantities for the average spectrum.
We have introduced some new commands to manage spectra:
Objects of type ‘color box’ (members of the list of special computations) can now compute the average spectrum and average values of a* and b* for fluctuating layer thickness values. This helps to understand spectral drifts due to production uncertainties.
There was a problem with Windows usernames which sometimes are returned in capital letters and sometimes not. Unfortunately this caused legal users to be rejected. We have relaxed the checking procedure in order to keep you going …