Encrypted Thin Film

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Encrypted Thin Film

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Description

The Encrypted Thin Film coating model is intended to allow coating suppliers a means of providing accurate thin film coating prescriptions for the purpose of raytrace analysis while allowing the supplier to protect their intellectual property. In order to use the Encrypted Thin Film coating model, a FRED encrypted coating file (*.fec) must have previously been exported from a Thin Film Layered coating model. The intended work flow is the following:

1.Coating supplier constructs a Thin Film Layered coating model in FRED. This can be done manually or by import from one of the supported thin film file formats.

2.Coating supplier exports the Thin Film Layered coating model to a FRED encrypted coating file (*.fec format).

3.Coating supplier provides the encrypted coating file to their customer

4.Customer creates a new Encrypted Thin Film coating model and reads in the provided *.fec file

The work flow described above can be performed using the FRED Demo version so that coating suppliers are not required to own a fully licensed version of the FRED Optical Engineering Software. Accuracy of the encrypted coating model will depend on the sampling specified during the coating export process. Refer to the Thin Film Layered coating topic for information regarding export sampling.

Once an Encrypted Thin Film coating has been added to the document, its behavior with regard to assignment, plotting, raytracing, etc. is the same as any other coating type with the following exceptions:

•The materials and layer prescription information cannot be accessed. Scripting language access to this information is denied.

•The “Summary Report” and “Detailed Report” menu options display only the name and description of the coating; all material and layer information is hidden.

•If the FRED model is exported as a FRED script file, the encrypted coating data is written as an encrypted hex string.

Please note that the encrypted coatings files used in ZEMAX and CODEV are not compatible with FRED and vice versa; each software uses its own proprietary encryption tool.

Legal note: The encryption method used is a “medium grade” encryption algorithm intended to prevent non-professional hackers from gaining access to the encrypted information. The user assumes all responsibility for the use of this feature.

Navigation

The Encrypted Thin Film coating type can be accessed in the following ways:

•Right mouse click on the Coatings folder and select, "Create a New Coating" from the menu

•Menu > Create > Coating

•Ctrl + Alt + C

In the resulting dialog, choose Encrypted Thin Film as the coating Type.

Controls

Control	Inputs / Description	Defaults
Name	Name of the coating.	Read from the imported *.fec file
Description	Description of the coating.	Read from the imported *.fec file
Encrypted Thin Film parameters
File	Press "Select File" to open a file browser for selection of the .fec file to be used. After selection, the description column will be updated to show the file path of the selected .fec file.
Substrate	When the .fec file is selected, the substrate orientation will be automatically set based on the contents of the .fec file. However, if it is determined that the coating orientation needs to be flipped after import, this option can be used to affect that change.	Will be automatically set during the *.fec file read

OK	Accept settings and close the dialog.
Cancel	Discard settings and close the dialog.
Help	Get coating help.