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本科毕业设计(论文)FINALPROJECT/THESISOFUNDERGRADUATE(2015届)短焦距投影仪光学系统设计方法ShortFocalLengthProjectionOpticalSystemDesignMethodology学院光电信息与计算机工程学院专业光电信息工程学生姓名陈飞鸿学号1112050120指导教师李柏承完成日期2015年5月承诺书本人郑重承诺：所呈交的毕业论文“短焦距投影仪光学系统设计方法”是在导师的指导下，严格按照学校和学院的有关规定由本人独立完成。文中所引用的观点和参考资料均已标注并加以注释。论文研究过程中不存在抄袭他人研究成果和伪造相关数据等行为。如若出现任何侵犯他人知识产权等问题，本人愿意承担相关法律责任。承诺人(签名)：______________________日期：年月日摘要在大屏显示市场中，投影机是一种极具优势的显示设备。投影设备广泛应用于各行各业，个人家庭、公司集体、校园教学等都是投影设备的市场。投影机相对其他大屏显示器来说具有更为有力的发展前景，它在显示画面及技术要求上不仅能满足人们对于大屏享受的要求，同时也能让人们不用担心因为显示尺寸变大而导致价格个高以及携带不便等问题。投影机在技术上分为RCT、LCD、PLD三种投影机，RCT主要以三色阴极射线管为成像器件的主体部分，LCD的成像器件则以液晶为主，至于PLD的成像器件主要以DMD为主，三种投影技术各有优缺点，本文将针对两种主投影机DLP以及LCD投影机进一步介绍阐述。投影的发展让画面显示在尺寸上有了更大的飞跃，但与此同时，大屏投影机对于空间的要求也逐渐变高。。我们都知道，在投影机投影时，若是将屏幕与投影机之间的距离缩短，投影在幕布上的画面就会出现不完整画面出现在幕布之外或者出现模糊畸变等情况，从而影响人们的观看，为了解决这一问题，也就产生了一种新型的投影机--------短焦距投影机。短焦距投影相对于普通投影来说其优势在于让大屏投影显示对于空间范围的要求更低。打个比方说，同样是显示在50寸的屏幕上，普通投影需要在5米远的地方才能完整的显示在屏幕内，而对于短焦距来说，可能只需要3米甚至1米的距离，这样对于环境的要求也就降低了很多。所以，在应用范围上，短焦距投影将拥有更为广阔的市场和发展前景。关键词：LCD（液晶显示）投影机PLD(数字光处理)投影机短焦距投影AbstractInthelarge-screendisplaymarket,theprojectorisagreatadvantageofthedisplaydevice.Projectionequipmentiswidelyusedinvariousindustries,individualhouseholds,firmscollectivelycampusteaching,etc.areprojectionequipmentmarket.Theprojectorrelativetootherlargescreendisplayishavingamorepowerfuldevelopmentprospects,itisdisplayedonthescreenandnotonlycansatisfythetechnicalrequirementsforthebig-screenenjoymentofrequirements,butalsoallowspeoplenottoworrybecausethedisplaysizebecomeslargercausepricehighandbringinconvenienceandotherissues.TheprojectoristechnicallydividedintoRCT,LCD,PLDthreeprojectors,RCTmainlyinthreecolorcathoderaytubeasthemainportionoftheimagingdevice,LCDliquidcrystal-basedimagingdeviceplaces,asPLDimagingdevicemainlyDMDbased,threeprojectiontechnologyhasadvantagesanddisadvantages,aredescribedhereinsetforthforthetwomainDLPprojectorsandLCDprojectors.Developmentprojectionsothatthescreendisplayhasagreaterleapinsize,butatthesametime,alarge-screenprojectorforspacerequirementsarealsograduallyincreases..Weallknow,whentheprojector,ifthedistancebetweenthescreenandtheprojectorisshortened,theprojectionscreenwillappearonthescreenwithoutacompletepictureappearoutsidethecurtain,whichaffectspeople'sview,inordertosolveThisproblem,alsoproducedanewtypeofprojector--------shortfocallengthoftheprojector.Shortfocallengthprojectionrelativetothenormalprojectionisitsadvantageistoallowlarge-screenprojectiondisplayrangerequirementsforspacelower.Sotospeak,isalsodisplayedona50-inchscreen,5metersordinaryprojectorneedplacestobedisplayedinfullscreen,andforashortfocallength,itmaybeonly3metersoronemeterdistance,thiswillreducetherequirementsforenvironmentalot.Therefore,theapplicationrange,shortfocallengthprojectionwillhaveawidermarketanddevelopmentprospects.Keywords:LCDprojectorsPLDprojectorshortfocallengthprojectioni目录摘要Abstract第1章绪论..................................................................................................................11.1课题研究背景说明..............................................................................................11.2课题研究目及研究方向的说明..........................................................................11.3课题研究意义......................................................................................................1第2章投影仪的光学成像系统介绍..........................................................................32.1投影机原理介绍..................................................................................................32.1.1基本介绍......................................................................................................32.1.2部件组成及基本原理...................................................................................32.1.3技术分类.......................................................................................................62.2LCD投影机.........................................................................................................72.2.1LCD型投影机的介绍..................................................................................72.2.2LCD投影机的基本原理..............................................................................72.2.3LCD投影机的优缺点介绍..........................................................................92.2.4LCD投影机的发展前景............................................................................102.3DLP投影机的介绍...........................................................................................102.3.1DLP投影机的基本原理............................................................................102.3.2DMD—DLP的桉心器件...........................................................................122.3.3DLP投影机的优缺点介绍.......................................................................142.3.4DLP投影机的发展前景.............................................................................142.4DLP（单片式）与LCD（三片式）投影机的比较.......................................14第3章短焦投影机技术及其优势介绍....................................................................173.1短焦投影的基本介绍......................................................................................