Curl-free ray mapping in three dimensions for freeform illumination design

Caleb Gannon, Rongguang Liang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


An illumination design method that incorporates the entire 3-D geometry between the optical surface and target plane into the ray mapping calculation has been developed. The resulting mapping relationship is integrable along the specific contours of the optical surface instead of a 2-D plane. The method is capable of creating extremely high performance, off-axis designs (97% uniformity at 54-deg off-axis), and since it explicitly accounts for system geometry, appears to be easily generalizable.

Original languageEnglish (US)
Article number025102
JournalOptical Engineering
Issue number2
StatePublished - Feb 1 2019


  • freeform
  • illumination design
  • nonimaging optics

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering


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