Optical System Research And Design Of Auxiliary Project Automobile Reversing Lamp

With the intelligent development of the automotive industry,people begin to pay more attention to the interaction with the surrounding environment in addition to the basic functionality of automobile lighting system,that is through the use of truly variable light patterns to establish a more distinct and lighting-based way of communication,shows the vehicles' intentions to the passengers on-board.Based on the theory of non-imaging optics,the optical softwares of LucidShape and SPEOS are used to carry out a large number of explorations and researches on the auxiliary project reversing lamp optical system with interactive function,and provide a possible application method of the future automotive lighting system.The main research contents include as below:Firstly,according to the photometric requirements of regulation GB15235-2007,the reflector of reversing lamp was redesigned based on the 3D structure of original paired reversing lamp,the fundamental surfaces were divided legitimately and the surface profile data of sub-surface were optimized,which could fulfill the regulation of the photometric intensity 45 degrees inwards at least 15 cd.the horizontal stripes of the outer lens were redesigned with CATIA,to improve optical system light utilization and keep it consistent with the overall shape of the lamp.The final simulation result can meet the photometric intensity regulation and fulfill the requirments of the road scene illumination of reversing lamp.Secondly,the auxiliary projection reversing lamp system was designed,including the selection of optically-related LED light source,the design of the reflector,baffle and lens,and the electronically-related PCB board and driving circuit.Finally,all the parts were simulated and optimized in SPEOS so that the final results meet the requirements.Thirdly,the sample lamp was tested and carried out regulations validation,the sample lamp test result had achieved 83% of simulation value which consistent with the simulation result,and the light intensity of each point is above the minimum value required by the regulation and satisfies the reversing lamp road scene illumination requirements.The auxiliary projection reversing lamp projects a relatively clear “arrow” symbol on the road,The ratio of the average illuminance value measured of the imaging is 13.1:3.2:1.The imaging position is basically consistent with the expected design.it can provide signal indication for other road users during the reversing of the car,which can effectively reduce traffic and improve the road safety,the feasibility of the design method is verified in practice.