The sequential system had an entrance pupil diameter of 10 lens units. To create the same on-axis input beam, we can place a collimated, circular non-sequential source object of the same size to the left of the first lens.

Insert a new line anywhere is the non-sequential component editor.

Open the Object Property window by double clicking on the Object Type column in the non-sequential component editor and set the type as “Source Ellipse” and click OK

In the editor, set the following parameters for the Source Ellipse and leave all other parameters same as default.

Z position = -10 (since it is collimated, it does not matter where it is located as long as it is to the left of first lens)

# Layout Rays = 10
# Analysis Rays = 100000
X Half Width = 5
Y half Width = 5

Update the 3D Layout; it shows the source with 10 analysis rays.



Rays are tracing correctly!