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OptiLayer:  Your Partner in Design and Post-Production Characterization of Optical Coatings


All OptiRE options have been carefully tested on the sets of real measurement data. Results of out studies as well as methodology of the reverse engineering are published in our papers.

 Systematic Errors

Systematic errors in measurement data may be caused by various factors, for example: 

  • signal drifts in the registration circuits of spectrophotometric devices;
  • inaccurate calibration of monitoring devices; 
  • vacuum shift;
  • inaccuracy of tooling factors for witness glass.

These factors may result in the shift of measured transmittance/reflectance data as a whole or in the scaling them by a factor that differs from 1. 

From a mathematical point of view, in the course of Systematic errors procedure only two unknown parameters are searched for. Optical coating model in this case can be described by vector \(X\):

\[X=d_1+\Delta_H, d_2+\Delta_L,...,d_m+\Delta_H(L)\]

optical characterization Fitting before and after application of systematic errors model (put the mouse on and out of picture)
systematic errors layer thicknesses

Discrepancy function is optimized with respect to systematic shifts \(\Delta_H, \Delta_L\):

\[ DF^2(\Delta_H, \Delta_L)\rightarrow \min\]

  • OptiRE allows you to represent any errors as a sum of systematic errors and pure random errors with average value with respect to any layer material equal to zero (Normalize Errors);
  • Correction factors present systematic components of the ratios of actual thicknesses to theoretical ones (useful for adjusting the deposition process)
errors in layer thicknesses

post-production characterization

The results of the procedure are presented as Relative, Absolute errors or correction factors for layers of active materials.

Systematic errors procedure can be easily run from an external software with the help of COM Automation tool.



Easy to start

Icons 100x100 1OptiLayer provides user-friendly interface and a variety of examples allowing even a beginner to effectively start to design and characterize optical coatings.        Read more...

Docs / Support

Icons 100x100 2Comprehensive manual in PDF format and e-mail support help you at each step of your work with OptiLayer.



Icons 100x100 3If you are already an experienced user, OptiLayer gives your almost unlimited opportunities in solving all problems arising in design-production chain. Visit our publications page and challenge page.


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