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 language | English |
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Pages (from-to) | 153-155 |
Number of pages | 3 |
Journal | Optics and Laser Technology |
Volume | 49 |
DOIs | |
State | Published - 2013 |
Keywords
- Intelligent lighting
- LED
- Micro-lens array