Optimal design of optical system for LED road lighting with high illuminance and luminance uniformity

In order to achieve high illuminance and luminance uniformity of the road surface in light-emitting diode (LED) road lighting, a new method is proposed. The illuminance and luminance are analyzed simultaneously with the least-square method, based on the reflection properties of the road surface. Energy efficiency and glare requirements are considered, in the meantime. The optimal light distribution of a luminaire is obtained, through the analysis and calculations. A freeform lens with this light distribution is then designed. The overall illuminance and luminance uniformity on the road surface can reach over 0.9 and 0.85, respectively, and the glare factors less than 10% for a 2-lane C1 class road illuminated by LED luminaires mounted with these lenses.

• Record URL:
  https://doi.org/10.1364/AO.52.005888
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/1559128X
• Authors:
  • Xiaojia, Hu
  • Keyuan, Qian
• Publication Date: 2013-8-20

Media Info

• Media Type: Web
• Features: Figures; References;
• Pagination: pp 5888-5893
• Serial:
  • Applied Optics
  • Volume: 52
  • Issue Number: 24
  • Publisher: Optical Society of America, Incorporated
  • ISSN: 1559-128X
  • EISSN: 2155-3165
  • Serial URL: http://www.opticsinfobase.org/ao/home.cfm

Subject/Index Terms

• TRT Terms: Design; Light emitting diodes; Luminaires; Luminance; Mathematical analysis; Optical systems; Optimization; Street lighting
• Subject Areas: Design; Highways; Vehicles and Equipment; I85: Safety Devices used in Transport Infrastructure;

Filing Info

• Accession Number: 01505090
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 27 2014 10:45AM