Dear Zemax Support Team,
I have a question regarding the Huygens PSF calculation in afocal optical systems. Since afocal systems do not form a real image plane, I would like to understand how Zemax handles this scenario. Specifically:
- Does the Huygens PSF in an afocal system represent the far-field angular distribution (similar to an angular PSF)?
- How does Zemax define the reference plane for integration when there is no real image plane? Is it based on the paraxial image plane, a user-defined surface, or another method?
Any clarification or documentation on this would be greatly appreciated.
Thank you for your support!
\
