Variable Parameters

A checked box means that the corresponding parameter (Wavelength, Period, Angle (Normal Angle and Plane Angle in the conical mount version)) will be varied to optimize the Criterion Function. It also means that the user can edit the above variables as the starting optimization parameters. If a box is not checked these edit controls are inactive and display the current criterion point arguments values during the optimization. The above parameters can be set as variable only if the Criterion function has the same parameter value for all Criterion points.
The user can check the structure parameters under optimization by way of Settings Dialog after the Export procedure.

The structure media with identical refractive indexes can be combined in a group identified by its index number by selecting the check box in the Material Group control. If the Add To Group of the Material Group control is selected, the Group control indicates the index of group which corresponds to the selected Layer while the Members control indicates total number of elements in the current group. The maximum allowed Group Index always corresponds to an empty group; it automatically increases or decreases as soon as a first refractive index group member is introduced or the last refractive index group member is removed. If the Set group Parameters of the Material Group control is selected, the refractive index of the selected group and its variable status can be set while the Member control allows inspecting of current group member other parameters. After start the Optimization all material assignment for media in the group will be removed.

Note 1 During the Optimization process the edit controls are disabled but they display every second the real time values. In addition, if the user changes the Group Index, Layer Index or Interface Index the related parameters will be updated immediately.

Note 2 (C-method codes) The Wavelength, Period, Angle (Normal Angle and Plane Angle in the conical mount versions) and the Layer Thickness are the Optimization Dialog structure values, while Grating Depth, Grating Shift in the Extended versions is calculated relative to the parent project window grating parameters stored in the Optimization Dialog. For example, after the optimization process, the Grating Depth value can be negative. This simply means the opposite sign of every sinus harmonic in the Optimization Dialog grating profile decomposition with respect to the harmonics of the parent project window structure.

Note 3 (Modal method codes) The Cell Length is normalized for the period and its variation has two options. The unselected or disabled Check Box Fixed Center implies that a sum of lengths of given Cell and the next Cell is constant. The selected and enabled Check Box Fixed Center implies that the given Cell center position is preserved and a sum of lengths from previous to the next Cell is constant.
The Bunch of Layers, Thickness controls are visible only if the Bunch scanning option was selected in parent project window used for creating Optimization dialog.