Criterion Function

The Optimization procedure objective is the minimum mean-square deviation of the user defined values assigned in the Criterion Function from the calculated values. The user can construct this function in the form of a number of (Number of Points) completely independent criterion points. The Point control provides the possibility to select the criterion point index. By clicking the mouse right button at this control the user activates the Popup Menu for editing the criterion points.
Every criterion point targets the assigned power of the given diffraction order (edit control Value) with the Weighting Factor of this criterion point within the whole criterion function and its characteristics (Diffraction Order and Cover/Substrate propagation). The Output Polarizer and its orientation (edit control Angle) is an additional criterion point characteristic. All these characteristics are placed in the Criterion Diffraction Order Power panel. The right hand Criterion Arguments panel contains other parameters. These arguments are: the polarization type, the incident conditions Normal Angle, Plane Angle, Wavelength and the grating X-Period and Y-Period. The edit controls of the corresponding Variable parameters are inactive.

During the Optimization process these two panels are inactive, but at the bottom of the left panel under the label Current Power Value the user can see the updated every second power of the appropriate diffracted wave. In addition this information will be updated every time the user changes the criterion Point index.