Automated Optimization Of LED Illumination System

With the trend of global energy shortage, in recent years, our country have alsotaken " Green development，construction resource conservation and environmentfriendly society " as energy development strategy to plan for the "twelfth five-yearplan". LED light sources have many advantages compared with conventional lightsources, such as lower power consumption, longer lifetime, smaller size, safety, androbustness, Which have a widely application and good development prospect in themodern photovoltaic systems and the lighting.However, LED has a different luminous intensity properties from the traditionallight source, it should be design the corresponding optical system to meet the desiredilluminance distribution. What’s more, how is the lights for high efficiency and lowcost to transport and light distribution for LED to form. It is an urgent problem tosolve.In this paper, numerical solutions and trial and error methods are combinedeffectively. An automated optimization method based on macro-optimization in thesequential mode of ZEMAX is introduced for LED uniform illumination of widelyfield of view scope. According to the conservation of energy, we deduce therelationships between the location of light rays on the target plane and the incidentangle, which is taken as the theory calculated formula of macro edit. This ismodified by employing feedback function for an extended source. According as the energy feedback function, it can be appropriately modify the incident angle, that cancontrol the light to any desired location and obtain the expected uniformdistributions. Also, this method is applicable to the design of collimated lens.In the beginning of the dissertation, the research background is summarized,development history and technical level of LED are shown. The luminous principle,application domain and the optical properties are introduced, the advantages ofdistribution of LED source are compared.In the second chapter, the history and contents of non-imaging optics areintroduced, and introduces the theory of aspheric surface that related to it. At last,according to the mapping relationship, the basic structure of lens, the theoreticalanalysis and conclusions are given.In the third chapter, the macro-optimization method has been applied to thedesign of the lens including the standard extended Lambertian source and the sourceof known light distribution curve. Finally the design of collimated lens examples areillustrated.In the forth chapter, the ray-tracing simulation is finally given by TracePro, toverify the correctness and feasibility of the design.At the end, the research work were summarized and some opinions for futuredevelopment are given.