Orientation of Gratings within a Grating Region

In VirtualLab Fusion, users can define arbitrary regions on an optical surface. Within a region, grating interface /stack can be added on. To conveniently define the orientation of the grating within the region, two angles can be used, i.e.,  “Orientation (Rotation about z-Axis)” and “Rotation about y-Axis by 180°”.

This tutorial shows how to set these two angles to control the orientation of a grating in one region.