Circular Analysis Surface
FRED has two types of analysis surfaces:
- The "standard" analysis surface type, which is rectangular.
- The detector entity type, which is available in non-rectangular shapes such as sphere, cone, and cylinder.
When a plane, circular shaped analysis surface is the most suitable configuration, use the cone shaped detector entity and set the height of the cone to zero, as shown below. Note: Detector entities can only be used for incoherent raytraces.