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1、FreeformlensdesignforLEDcollimatingillumination1,*1211Jin-JiaChen,Te-YuanWang,Kuang-LungHuang,Te-ShuLiu,Ming-DaTsai,1andChin-TangLin1DepartmentofElectricalEngineering,NationalChanghuaUniversityofEducation,2ShiDaRoad,Changhua50074,Taiwan2DepartmentofElectro-OpticalandEnergyEn
2、gineering,MingdaoUniversity,369WenHwaRoad,Peetow,Changhua52345,Taiwan*jjchen@cc.ncue.edu.twAbstract:WepresentasimplefreeformlensdesignmethodforanapplicationtoLEDcollimatingillumination.Themethodisderivedfromabasicgeometric-opticsanalysisandconstructionapproach.Byusingthismet
3、hod,ahighlycollimatinglenswithLEDchipsizeof1.0mm1.0mm×andopticalsimulationefficiencyof86.5%underaviewangleof±5degisconstructed.Toverifythepracticalperformanceofthelens,aprototypeofthecollimatorlensisalsomade,andanopticalefficiencyof90.3%withabeamangleof4.75degismeasured.©201
4、2OpticalSocietyofAmericaOCIScodes:(220.2740)Geometricopticaldesign;(220.4298)Nonimagingoptics;(220.2945)Illuminationdesign;(230.3670)Light-emittingdiodes.Referencesandlinks1.H.RiesandJ.Muschaweck,“Tailoredfreeformopticalsurfaces,”J.Opt.Soc.Am.A19(3),590–595(2002).2.P.Benítez
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