Frontiers of Optoelectronics, 2017, 10 (4): 353, 网络出版: 2018-01-17
Optical design of rectangular illumination with freeform lenses for the application of LED road lighting
Optical design of rectangular illumination with freeform lenses for the application of LED road lighting
摘要
Abstract
We present a freeform lens for application to light-emitting diodes (LED) road lighting. We propose a simple source-target luminous intensity mapping method based on Snell’s law and geometric-optics analysis. We calculated different contours of cross-sections to construct a freeform lens with a smooth surface. The computer simulation results show that the lighting performance of a single freeform lens is not sufficient for road lighting. For the road lamp simulation, we adopted an oval arrangement of freeform lenses on a printed circuit board. In addition, we performed tolerance analysis to determine the tolerance limits of manufacturing and installation errors. A road lamp at a height of 12 m can create rectangular illumination with an area of 40 m × 12 m, 69.7% uniformity, and average illuminance of 24.6 lux. This lighting performance can fully comply with the urban road lighting design standard.
Chunyun XU, Haobo CHENG, Yunpeng FENG. Optical design of rectangular illumination with freeform lenses for the application of LED road lighting[J]. Frontiers of Optoelectronics, 2017, 10(4): 353. Chunyun XU, Haobo CHENG, Yunpeng FENG. Optical design of rectangular illumination with freeform lenses for the application of LED road lighting[J]. Frontiers of Optoelectronics, 2017, 10(4): 353.