Design of a high-efficiency LED low-beam headlamp using Oliker's compound ellipsoidal reflector

Shu Chun Chu, Po Yo Chen, Cing Yi Huang, Kuo Chih Chang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This paper presents a design for a high-efficiency, low-beam headlamp with Oliker's ellipses technology [Computing Lett. 2, 29 (2006)]. In addition to the one-time intrinsic light absorption of reflection, the designed low-beam lampshade can reflect all the light from the LED in the on-demand illumination range. This study proposes and adopts a matrix calculation method to accelerate the calculation speed of constructing an Oliker's composite ellipsoidal reflector, which in turn increases the ellipsoidal facet number of the compound ellipsoidal reflector. In the design of the low-beam headlamp, the illumination weight on the target plane is defined by the method of curve fitting, which ensures that the light-field pattern of the low-beam headlamp changes smoothly rather than in a patchy distribution. The content of this study itself also provides a design method and example for applying Oliker's ellipses technology to on-demand spatial lighting.

Original languageEnglish
Pages (from-to)4872-4879
Number of pages8
JournalApplied optics
Issue number16
Publication statusPublished - 2020 Jun 1

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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