An optical-adjustable illumination pattern with a surface-structured diffuser compensated by index-matching liquid

Xuan Hao Lee, Chi Shou Wu, Kuan Hung Lee, Tsung Hsun Yang, Ching Cherng Sun

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This paper presents a new luminaire for light-emitting diode (LED) lighting with an adjustable light pattern. The luminaire contains secondary optics and a surface-structured diffuser to spread the light pattern to fit a specified illumination area. The structured surface with a micro-lens array can be filled with index-matching liquid so that the lighting pattern is adjustable. A detailed simulation is presented for both optical efficiency and variation of the light pattern with variation of the refractive index of used liquid, and a corresponding experiment is demonstrated.

Original languageEnglish
Pages (from-to)153-155
Number of pages3
JournalOptics and Laser Technology
Volume49
DOIs
StatePublished - 2013

Keywords

  • Intelligent lighting
  • LED
  • Micro-lens array

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