Ray selection for optimization of rotationally symmetric systems

Greg W. Forbes*, Johannes Ruoff, Andreas Flesch, Norbert Kerwien

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Efficient performance assessment is essential during the design of systems involving complex aspheres. We present new classes of pupil sampling schemes that, with a reduced number of rays, yield accurate estimates of the RMS wavefront aberration over a circular pupil. It turns out that the number of samples in the pupil can be reduced by a factor of about 0.7, and these ideas can also be expected to lead to a similar additional reduction factor when averaging over the field and color. Beyond that, analysis of a patented lens system is used to establish the path to further significant reductions.

Original languageEnglish
Pages (from-to)237-247
Number of pages11
JournalAdvanced Optical Technologies
Issue number3
Publication statusPublished - 1 Jun 2016


  • aspheres
  • cubature
  • optical design
  • optimization


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