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时间:2019-03-06
《硅基液晶投影系统的led光源照明系统设计》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、激光与电子学进展51,072201(2014)Laser&0ptOelectrOnicsProgress@2014(中国激光》杂志社硅基液晶投影系统的LED光源照明系统设计赵斌张国玉2陈启梦张健王国名‘长春理工大学光电工程学院,吉林长春130022。吉林省光电测控仪器工程技术研究中心,吉林长春130022摘要硅基液晶(LCOS)空间光调制器件的特点是反射光成像,要求照明光束发散角小,均匀性好。对此,设计了由抛物型反光碗、复眼透镜、偏振分光棱镜、聚光镜等组成的用于LCOS的照明系统,对抛物反光碗以及复眼透镜各参数的设计原理做了详细分析,具体包括光源出射角度,光源的总体长度,所需均
2、匀照亮的尺寸,抛物反光碗各参数对出射角度的影响,其实现原理主要包括复眼透镜匀光理论。设计要求光源出射角度小于10。,总体长度为220mm,均匀照明面积为20mmx20mE,最后给出聚光透镜组的设计结果,使光线聚焦到LCOS表面,照度值要达到0.35lx/m。,其不均匀度在15%以内。进一步使用Lighttools软件,对其进行仿真,由照度曲线图和照度栅格图可知,设计结果满足设计要求。关键词光学设计;抛物反光碗;复眼透镜;硅基液晶中图分类号V249.4文献标识码Adoi:10.3788/LOP51.072201DesignofIlluminatingSystemforLiquid
3、CrystalonSiliconProjectionSystemonLEDLightSourceZhaoBinZhangGuoyu‘。ChenQimengZhangJianWangGuomingCollegeofOpto—ElectronicEngineering,ChangchunUniversityofScienceandTechnology,Changchun,Jilin130022,China2JilinEngineeringResearchCenterofPhotoelectricMeasurementandControlInstruments,Changchun,J
4、ilin130022,ChinaAbstractItisliquidcrystalonsilicon(LCOS)micro—projectorScharacteristicthatanimageisformedbythereflectedlightfromtheLCOSsurface,andtheilluminatingbeamangleofdivergenceneedstobesmall,theuniformityerrorofilluminatingshouldbefairlywel1.Accordingtotheserequirements,anilluminatings
5、ystemonLCOSisdesigned,theprojectiondeviceconsistsofaparabolicreflector,flyS—eyelens,apolarizingbeamsplitter,condenserlensandSOon.TheparametersoftheparabolicreflectorandtheflyS—eyelensareanalyzedindetail.Itincludesthebeamangleofdivergence,thetotallengthforthelightsourceandtheintendedsquaretob
6、euniformilluminated.BasedonthetheoryofflySeyeSinformilluminatingandtherelationshipbetweenparametersoftheparabolicreflectorandthebeamangleofdivergence.Thedesignrequirementsarethatthebeamangleofdivergenceshouldbesmallerthan10。,thetotallengthofthelightsourceshouldbe220mm,theareatobeilluminatedi
7、s20mm×20mm.FinallycollimatinglensisdesignedtocollimatetheraysontheLCOS,theilluminanceshouldbeaslargeas0.35lx/m.AnditisdemandedthattheuniformityerroronthesurfaceofLCOSshouldbelimitedin15%.SimulationresultsareacheivedbyLighttools.Basedonthelinecharts
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