ABg Scatter Data Catalogs
Provides access to the ABg scatter data catalogs.
File: The current ABg scatter data file name. This file must be placed in the \ABG_DATA directory; the file name may be selected on the System, General dialog box on the Files tab.
Name: The name of the ABg data being edited.
Wave: The wavelength in microns at which the ABg data is defined (or was measured). If this value is zero, no scaling with wavelength will be performed. Otherwise, the A and B values will be scaled with wavelength as defined in the discussion below.
Use: If checked, then the displayed row will be used. Up to 10 data rows may be defined for each ABg data name.
Angle: The angle of incidence in degrees. The value should be between 0.0 and 90.0, inclusive. Intermediate angles of incidence are linearly interpolated in cosine space. If data is required at angles less than the smallest angle defined, data for the smallest angle defined will be used. Data for the largest angle defined will be used for any incidence angles greater than the largest angle defined..
A, B, g: The A, B, and g values at the specified angle of incidence.
TIS: Pressing this button will compute the total integrated scatter (TIS) for the displayed data. This value must be less than 1.0 for accurate scattering results. See the discussion.
Save: Saves the modified data to the catalog.
Save As: Saves the modified data to a catalog of a different name.
Exit: Closes the dialog box.
Insert: Inserts a new ABg data entry into the catalog; and prompts for the name of the new entry.
Delete: Deletes the displayed ABG data entry.
Reload: Loads from the last saved data file the ABg data; eliminating any changes made since the last save.
Sort: Sorts in ascending order by angle the displayed data. The data is automatically sorted whenever the catalog is saved or loaded.
Report: Sends the data to a text window which may then be printed.
Rename: Prompts for a new name for the ABg data.
Discussion: ABg data values are used to define scattering properties of both sequential and non-sequential surfaces. Each ZEMAX lens files may use a separate ABg data catalog if desired. The ABg data file used is specified on the System, General dialog box on the Files tab. The selected ABg catalog only may be edited from within ZEMAX using the ABg Scatter Data Catalog dialog box.
The integral of the ABg distribution function over the unit vector circle that represents physically possible scattering ray directions determines the total integrated scatter, or fraction to scatter. This integral is automatically computed by ZEMAX when required; to view this integral press the TIS button. The TIS must be less than 1.0; otherwise conservation of energy may not be preserved and the scattering will not be correct.
See the ABg Scattering section of the ZEMAX User's Guide for a discussion of wavelength scaling of ABg data.