Hi Jeff,

Yes, in this design paraxial ray aiming is on. I have checked with ray aiming off, when ray aiming is off this circular ring effect is not there.

So, what I understand this is not a design issue rather some ray tracing error.

Regards,

Supravat

​@SUPRAVAT MONDAL:

Hi Supravat.  Yes, this is a bug associated with paraxial ray aiming.  If you need ray aiming to correct for pupil aberration, you can try using the “Enhanced Ray Aiming” option.  It might help, but it is rather slow, so Image Simulation may take a while.

​

@Angel Morales:

Hi Angel.  This is another example of the bug that you logged for me in August 2024.  Just wanted to bring it to your attention.

Regards,

Jeff

Hi Jeff, 

By using "Enhanced Ray Aiming" aslo same issue arises. But, Circular Ring effect is not there when, I unchecked "Automatically Calculate Pupil Shifts" with the Paraxial Ray Aiming on. 

Regards, 

Supravat

Hi Supravat,

Interesting.  In my case using Enhanced Ray Aiming solved the problem.  In any event, I found that this ring-like artifact occurred when the following three conditions were all simultaneously present: (1) paraxial ray aiming was on, (2) the auto pupil shift feature was selected, and (3) both x and y fields were defined.   When either turning off the auto pupil shift or defining fields only along the x or y direction (but not both), the artifact would disappear.  

Hopefully the development team can visit this issue and try to correct it.

Regards,

Jeff

​@Jeff.Wilde How are your fields defined?  Are they defined as Angles?  

​@MichaelH :  In the example that I provided to Angel, the fields are spatial (object heights).

Regards,

Jeff