Understanding the Ray File Source Parameters

This page describes the parameters to set when creating a Ray File Source.

Exit Geometries

The exit geometries represent the geometries present during source measurement (the bulb of a light bulb or the case of a LED) that could potentially influence the optical behavior or intensity distribution of the source.

Selecting exit geometries allows you to define a new emissive geometry to avoid recalculation of the geometry's effect on the source.

For example, if you selected an iesna file (*.ies) corresponding to a light bulb, the bulb geometry is taken into account in the data of the iesna file. To avoid the recalculation of the light bulb's effect, the bulb must be selected as the exit geometry.

Intensity distribution without specific exit geometry. Intensity distribution with lens defined as exit geometry.