Optical Design And Analylsis Of Automobile Headlamp System Contrusted Of Compound Eye Lens

As car styling tends to be streamlined and sporty flat,the size of car styling has become more and more strict.At present,in low-end cars,car headlights have low light efficiency utilization and overall size The bigger question.Due to the limitations of various regulations and standards,the structure of the traditional headlamp design is difficult to further optimize the design of the headlamp.Therefore,according to the current development of automobile headlamp design,this paper proposes and designs an automobile headlamp optical system based on compound eye lens.Through the design theory of non-imaging optical system and free-form surface design method,the automobile low beam lamp and The design method and structure of the high beam light optical system have achieved the goals of improving the efficiency of light efficiency and minimizing the overall volume on the premise of complying with national regulations and standards.The main research contents of this article include:1.Low beam optical system.Design a low beam optical system based on the compound eye lens array structure,and model the free surface of the low beam compound eye lens through non-imaging optical design theory and free surface design method.At the same time,a suitable LED chip light source is selected,and the structure is simulated,improved,and optimized according to regulatory requirements.Mainly completed the design of TIR fly-eye lens,bright and dark cut-off line baffle,external large lens and external lens pattern.The TIR compound eye lens structure is composed of a TIR collimating lens and a calculated freeform array,which achieves the uniformity requirement while achieving light distribution.The data analysis of the simulation results shows that its luminous flux has reached 924 lm,and its light efficiency utilization rate has reached 77%,which is 20%-30% higher than that of the currently used low-beam lamp system.It is verified that the simulation results achieved meet the requirements of national standards and regulations.2.Designed the high beam optical system,designed a high beam optical system that shares a set of external lenses with the low beam optical system.Through the non-imaging optical design theory and free-form surface design method,the free-form surface of the compound eye lens of the high beam lamp is modeled.Carrying out simulation and research and analysis of the simulation results,it is concluded that the luminous flux value is 682 lm,and its light efficiency utilization rate is 81.2%,which is 5% to 10% higher than the light efficiency utilization rate of the currently used high beam light optical system The illuminance of the light area is 111 lx,which is tested and compared with the regulations,and it is concluded that the simulation results meet the requirements of national standards and regulations.3.Physical test of sample lamp.Carry out rapid sample physical testing of the designed products and conduct regulatory inspection and road photo analysis of the physical testing results.Comparing the simulation results with the actual test results,the measured luminous flux of the low-beam light optical system reached 856 lm,reaching 92% of the simulated value,and its light efficiency utilization rate reached 72.3%,which is lower than the current commonly used low-beam light system The efficiency utilization rate is increased by 15%-25%.The physical test results of the high beam system of this design have reached 91.8% of the simulation results,the total luminous flux is 626.1lm,and its strong light area is 102 lx.The low-beam lamp system and the high-beam lamp system have passed regulatory testing experiments,respectively,and verified that both systems meet the national requirements for light distribution standards.The overall size is 80mm×60mm×64mm,which is 5%-10% smaller than the traditional headlamp module in size design.According to the test results of the regulations,the two systems have met the requirements of the regulations,and the physical test results have verified the reliability and rationality of the design.4.According to the simulation results and physical test results,comparative analysis was carried out,and error analysis was carried out on the physical assembly and software simulation to obtain the source of error and the direction of later optimization.This paper implements a headlight optical system with a combination of far and near light.By using a system consisting of a TIR collimating system,a free-form compound eye lens structure,a baffle,and an aspheric lens,the efficiency of light efficiency is improved while reducing Module size target.Compared with the traditional design method,the utilization efficiency of the low beam light system has reached 72.3%,the utilization efficiency of the high beam system has reached 74.5%,and the benefit of reducing the overall module size has been achieved.It has been verified by experiments that the scheme complies with the regulations and regulations,and the manufacturing process is simple,which provides a new idea for the design of car lights.