Design and Implementation of a Vehicle LED Front Fog Lamp with High Sharp Bright Gradient Based on a Free Form Surface Lens

• Main Authors: Chun-Hui Chen, 陳俊輝
• Other Authors: 莊為群
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/26wnq6

碩士 === 國立虎尾科技大學 === 光電與材料科技研究所 === 102 === Vehicle lighting systems, the lens''s primary purpose is to light converge or diverge, the vast majority of lenses are spherical lenses, but for some special purpose, such as non-elliptical reflector and the design of the shading plate under the lens to be alone to create a high gradient cutoff line, a spherical lens does not apply. Therefore, we need to design a specific lens to change the direction of light, and these lenses are aspheric mirror often or free-form surfaces, previously limited computing capacity and processing technical limitations, aspheric and free form lens design and production is very difficult, however, with the computing power and by ultra-precision processing technology development, aspheric and free form lens design and manufacturing is feasible and worth developing. This research in a free surface design method of the lens surface coated free LED light source, LED light collection angle of light of each in order to achieve high utilization of the results, was found by the experimental design, the use a single twin 425lm LED light source can meet the more stringent ECE R19 F3 regulations, and allows a uniform distribution of light shape, and in no case visor shield to create a high gradient cutoff line. In this study, the derivation of free-form surfaces, and using MATLAB calculates a free form lens, optical simulation software and then to run the simulation, and implementation verification, cancellation larger reflective surface energy and shading plate coated with LED lens designed simply to light design, not only can improve the utilization of light, reducing the number of LED used to better reduce the size of the optical element, and the reflecting surface eliminating the cost of processing and manufacturing processes.