Design of LED lens for vehicle dipped headlight based on infinitesimal energy mapping

作者：Zhang J.-Y.^*; Li L.-F.

来源：Journal of South China University of Technology(Natural Science Edition), 2014, 42(3): 72-77.

DOI：10.3969/j.issn.1000-565X.2014.03.012

• Dipped headlight
• Freeform lens
• Illumination
• LED
• Non-imaging optics

In order to improve the luminous energy rate of dipped headlight in the LED projection headlamp system commonly used in vehicles, the relationships between the lighting distribution of LED dipped headlight and the light source energy as well as the freeform lens parameters were investigated based on the theory of non-imaging optics, and a design method of LED freeform lens for vehicle dipped headlight was proposed based on the infinitesimal energy mapping. Then, in order to verify the feasibility of this design method, a LED lens was designed with the software Rhino, and an illumination system of LED dipped headlight was constructed with the software Tracepro. Simulated results indicate that the designed lens not only provides illumination patterns matching the dipped headlamp regulation but also possesses a luminous energy rate increment of 23.5%, as compared with the traditional LED projection headlamp system.

• 出版日期2014
• 单位华南理工大学