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1、采用APD陣列的共口徑激光成像光學(xué)系統(tǒng)設(shè)計(jì)_于瀟_姚園_徐正平摘要：針對機(jī)載平臺(tái)激光3D成像系統(tǒng)的輕小型需求，設(shè)計(jì)了采用APD陣列的共口徑激光收發(fā)光學(xué)系統(tǒng)。在分析激光成像系統(tǒng)照明方式及其光學(xué)系統(tǒng)結(jié)構(gòu)的基礎(chǔ)上，給出了激光3D成像光學(xué)系統(tǒng)結(jié)構(gòu)框圖：激光經(jīng)衍射元件實(shí)現(xiàn)分束照明，采根據(jù)激光測距方程，確定了接收光學(xué)用雙工反射鏡實(shí)現(xiàn)收發(fā)光路的耦合。該光學(xué)系統(tǒng)用于2km以內(nèi)的目標(biāo)三維成像，系統(tǒng)的參數(shù)以獲得滿足信噪比的回波能量。為避免造成像素之間串?dāng)_，設(shè)計(jì)了5倍擴(kuò)束比的發(fā)射光學(xué)系統(tǒng)。最后，采用降低了發(fā)射光路對接收光路的影響。設(shè)計(jì)
2、結(jié)果表明：接收光學(xué)系統(tǒng)彌散斑直偏振片與1/4波片相結(jié)合的方式消除雜光，畸變小于0.2%。該光學(xué)系統(tǒng)體積小、重量輕，成像質(zhì)量良好，可為同類激光成像光學(xué)系統(tǒng)提供借鑒參徑小于120μm，考。關(guān)鍵詞：光學(xué)設(shè)計(jì);激光3D成像;發(fā)射/接收共光路;消雜光文獻(xiàn)標(biāo)識(shí)碼：Adoi：10．3788/CO．20160903．0349中圖分類號(hào)：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；修訂日期：20160223收稿日期：201614S123）；吉林省科技發(fā)展計(jì)劃資助項(xiàng)目基金項(xiàng)目：中國科學(xué)院國防科技創(chuàng)新基金項(xiàng)目（No．CXJJ（20150204022GX）SupportedbyInnovationFundProjectofNationalDefenseScienceandTechnology，ChineseAcademyofSciences
7、（No．CXJJ14S123），JilinProvincialS＆TDevelopmentProgramProjectofChina中國光學(xué)第9卷，，（No．20150204022GX）350thenoiseratio．Inordertoavoidcrosstalkbetweenpixels．Finallybeamexpanderoffivetimesisdesignedthestraylightisdiminishedtoreducetheimpactoftheemittedlightpathonreceivi
8、nglightpathbycombiningthepolaroidandquarterwaveplate．Theresultsindicatethatthereceivingopticshasadiffusespotdiameterlessthan120μmanddistortionlessthan0.2%．Thewholeopticalsystemcouldbeanex
