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《Acta Optica Sinica》 2012-02
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Lens Design for Uniform Illumination with LED

Li Lin1 Wang Guangzhen1 Wang Lili1 Kong Depeng1 Ji Jiangjun1 Zhang Yajun2 1 State Key Laboratory of Transient Optics and Photonics,Xi′an Institute of Optics and Precision Mechanics,Chinese Academy of Sciences,Xi′an,Shaanxi 710119,China 2 College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China  
A new method that the target plance is uniformly illuminated with aspheric lens is proposed.Based on the energy conservation law,it can be figured out the angle between the light source and the target surface,and the macro language of Zemax is used to make the lens meet the above mentioned relation,simulating and optimizing the result in the non-sequential mode and respectively simulating the three cases of the front surface.It is proposed and simulated a spherical LED array,and analysised the effect of the illumination uniformity of the angle and distance offsets.The result shows that the uniform illumination in a distance of 1 m and 0.25 m in diameter of the plane is achieved,with the uniformity of 96% or more.The spherical array meets the application requirements of shadowless lighting and the depth of illumination up to 1 m.
【Fund】: 国家863计划(2007AA032452);; 国家自然科学基金(60437020)资助课题
【CateGory Index】: O439;TM923.34
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