The Materials folder contains all of the currently defined materials in the FRED document.Clicking the "+" or "-" symbol next to the Materials folder will expand or contract its view to expose or hide the materials currently defined in the FRED document. Once a material has been created, the material type cannot be changed. Every new FRED document contains a set of default materials which cannot be deleted.
The Materials folder is located on the left pane of the FRED document view in the object tree under the column labeled "Objects".
Air – Sampled Material, constant refractive index, n = 1.0 Vacuum – Sampled Material, constant refractive index, n = .999707 (relative to Air) Simple Glass – Sampled Material, constant refractive index, n = 1.5 Standard Glass – Schott BK-7 equivalent glass, cannot be edited
A report of all materials currently contained in the Materials folder can be printed to the output window by right mouse clicking on the materials folder and selecting either "Summary Report" for a brief summary or "Detailed Report" for a complete listing of all the materials defined in the FRED document.
The summary report option prints the name and description of all defined materials.
The detailed report option prints all information relevant to the material including any coefficient specifications, real and imaginary refractive indices and absorption specifications. The wavelengths at which each material is evaluated is generated by searching through all the existing sources for unique wavelengths regardless of whether the source is designated Traceable or Not Traceable.
A material can be applied to a surface via drag and drop onto that surface.
A new material can be added to the FRED document by right mouse clicking on the Materials folder and selecting "Create a New Material" from the list menu.
Additionally, a material from one of the available glass catalogs can be added to the system by right mouse clicking on the Materials folder and selecting "Add Glass Catalog Material" from the list menu.
The refractive index of any material or combination of materials can be plotted. Select a material (or multiple materials) in the Materials folder of the object tree, right mouse click and choose "Plot" from the list menu.
A dialog will open allowing the user to select specific plot parameters.
Shown below is a plot of refractive index for Schott materials F5 and K7
Volume Scatter with the Henyey-Greenstein model Volume Scatter with a scripted volume scatter model
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