Creating Birefringent Materials from Catalog Materials
This knowledge base article describes a FRED script that can be used to create a birefringent material from any two materials found in the “Materials” folder of a FRED document. The Custom catalog contains a large number of birefringent materials with information about the ordinary and extraordinary indices, but they are listed as separate materials (e.g. CaCO3 and CaCO3_extraordinary). As of FRED 10.41 there is no quick way to convert those Custom catalog materials into usable birefringent materials of the type “Sampled Birefringent and/or Optically Active Material”. The attached FRED script “birefringentMaterialCreator.frs” uses a BASIC Dialog box (see image below ) to get user inputs including the materials to use for the ordinary and extraordinary indices, the wavelength range, crystal axis orientation, and the new birefringent material name. It then assigns the indices of the two materials as the ordinary and extraordinary indices of a new birefringent material for the specified wavelength range. This provides a quick and easy way to create usable birefringent materials from any two existing materials.
Download the FRED script birefringentMaterialCreator.frs