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ID:10638947
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页数:14页
时间:2018-07-07
《采用apd阵列的共口径激光成像光学系统设计_于潇_姚园_徐正平》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、采用APD阵列的共口径激光成像光学系统设计_于潇_姚园_徐正平摘要:针对机载平台激光3D成像系统的轻小型需求,设计了采用APD阵列的共口径激光收发光学系统。在分析激光成像系统照明方式及其光学系统结构的基础上,给出了激光3D成像光学系统结构框图:激光经衍射元件实现分束照明,采根据激光测距方程,确定了接收光学用双工反射镜实现收发光路的耦合。该光学系统用于2km以内的目标三维成像,系统的参数以获得满足信噪比的回波能量。为避免造成像素之间串扰,设计了5倍扩束比的发射光学系统。最后,采用降低了发射光路对接收光路的影响。设计
2、结果表明:接收光学系统弥散斑直偏振片与1/4波片相结合的方式消除杂光,畸变小于0.2%。该光学系统体积小、重量轻,成像质量良好,可为同类激光成像光学系统提供借鉴参径小于120μm,考。关键词:光学设计;激光3D成像;发射/接收共光路;消杂光文献标识码:Adoi:10.3788/CO.20160903.0349中图分类号:TP721.2;TP703LaserimagingopticalsystemdesignwithasharedapertureemployingAPDarrayYUXiao*,YAOYuan,XU
3、Zhengping(KeyLaboratoryofAirborneOpticalImagingandMeasurement,ChangchunInstituteofOpticsFineMechanicsandPhysics,ChineseAcademyofSciences,Changchun130033,China)*Correspondingauthor,Email:yuxiaojllove@126.comAbstract:Tomeettherequirementsoflightandsmalllaser3Di
4、magingsystemonairborneplatforms,acoaperturelasertransceiveropticalsystemisdesignedemployingAPDarray.Onthebasisofabriefanalysisoftheimagingsystemilluminationpatternandopticalsystemstructure,thelaser3Dimagingsystemblockdiagramisgivenasfollowing:thelaserbeamcanp
5、assthroughadiffractionelementtoachievebeamsplittingandthemirrorwithaholeinthemiddleisusedtoachievecoupledlaunching/transmittingopticalpath.Theopticalsystemisusedforthreedimensionalimagingwithinadistanceof2km,andthereceivingopticalsystemparametersaredetermined
6、accordingtothelaseroperatingrangeequationtoobtainenoughechoenergytosatisfy0126;修订日期:20160223收稿日期:201614S123);吉林省科技发展计划资助项目基金项目:中国科学院国防科技创新基金项目(No.CXJJ(20150204022GX)SupportedbyInnovationFundProjectofNationalDefenseScienceandTechnology,ChineseAcademyofSciences
7、(No.CXJJ14S123),JilinProvincialS&TDevelopmentProgramProjectofChina中国光学第9卷,,(No.20150204022GX)350thenoiseratio.Inordertoavoidcrosstalkbetweenpixels.Finallybeamexpanderoffivetimesisdesignedthestraylightisdiminishedtoreducetheimpactoftheemittedlightpathonreceivi
8、nglightpathbycombiningthepolaroidandquarterwaveplate.Theresultsindicatethatthereceivingopticshasadiffusespotdiameterlessthan120μmanddistortionlessthan0.2%.Thewholeopticalsystemcouldbeanex
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