This DLL provides several different mode to handle the polarization with Jones matrix. When the ray is normally incident on to the surface, it returns same data as the built in object “Jones Matrix”. When the ray is obliquely incident on the surface, this DLL can handle the polarization in a way more like expected result. The DLL has a “mode” parameter that can switch how it calculates the polarization for output rays, but the mode 0 will probably be the most useful option. A document is attached with the DLL to explain the calculation details in each mode.