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1、第34卷第3期航天返回與遙感2013年6月SPACECRAFTRECOVERY&REMOTESENSING9高分辨率詳普查結(jié)合型遙感成像技術(shù)111,21,21111趙惠樊學(xué)武鄒剛毅龐志海王煒任國(guó)瑞杜云飛蘇宇(1中科院西安光學(xué)精密機(jī)械研究所空間光學(xué)室,西安710119)(2中國(guó)科學(xué)院研究生院,北京100049)摘要首先介紹了詳普查相結(jié)合的空間光學(xué)觀測(cè)技術(shù)在空間觀測(cè)領(lǐng)域的重要應(yīng)用,總結(jié)了詳普查空間光學(xué)觀測(cè)的實(shí)現(xiàn)方法和發(fā)展現(xiàn)狀。分析了變形鏡變焦的理論設(shè)計(jì)思路,提出了采用變形鏡結(jié)合光學(xué)杠桿作用實(shí)現(xiàn)無(wú)運(yùn)動(dòng)部件變焦光學(xué)系統(tǒng)的設(shè)計(jì)方案,設(shè)計(jì)了一個(gè)變焦比為4的大視場(chǎng)四反射變焦光學(xué)系統(tǒng)。通過(guò)視場(chǎng)離軸消除了中
2、心遮攔,其中第三鏡為變形鏡;通過(guò)控制其曲率的變化來(lái)實(shí)現(xiàn)系統(tǒng)焦距從625mm到2.5m的變換;為了分擔(dān)變形鏡所承擔(dān)的光焦度,采用了分離主鏡的光學(xué)設(shè)計(jì)方案,最終光學(xué)系統(tǒng)的成像性能達(dá)到衍射極限。同時(shí),研制了縮比系統(tǒng)進(jìn)行了關(guān)鍵技術(shù)原理性試驗(yàn)驗(yàn)證,并成功實(shí)現(xiàn)了基于無(wú)運(yùn)動(dòng)部件的4倍變倍成像效果。該技術(shù)的研究對(duì)于在未來(lái)構(gòu)建新型的高分辨率詳普查結(jié)合型有效載荷有一定借鑒作用。關(guān)鍵詞變焦距變形鏡分離主鏡光學(xué)杠桿試驗(yàn)驗(yàn)證空間遙感中圖分類號(hào):TP72文獻(xiàn)標(biāo)志碼:A文章編號(hào):1009-8518(2013)03-0009-07DOI:10.3969/j.issn.1009-8518.2013.03.002High-r
3、esolutionImagingTechniqueCombiningCapabilitiesofCoarseandFineReconnaissance111,21,21ZHAOHuiFANXuewuZOUGangyiPANGZhihaiWANGWei111RENGuoruiDUYunfeiSUYu(1SpaceOpticsLab,Xi’anInstituteofOpticsandPrecisionMechanics,Xi’an,710119,China)(2GraduateUniversityofChineseAcademyofSciences,Beijing100049,China)Ab
4、stractTheimportantapplicationsofspaceopticalobservationtechnologiesbasedonthegeneralanddetailedinvestigationimagingarefirstintroduced,andtheinternalandoverseasopticalobservationmethodsandcurrentstatusofdevelopmentaresummarized.Then,thedesigntheoryforzoomopticalsystemsusingde-formedmirrors(DM)isint
5、roduced,andazoomopticalsystemdesignmethodbasedonDMswithoutanyme-chanicalmovingpartsisputforward.Finally,afour-mirrorreflectivezoomopticalsystemwithlargefield-of-view(FOV)isdesigned,withthezoomratio4.ThecentralobscurationiseliminatedbymakingtheFOVnon-coaxial.ThethirdmirrorisDM,thecurvatureofwhichis
6、controlledtomakethefocallengthchangefrom2.5mto10m.Theseparateprimarymirrorsforthedifferentfocalpositionsareusedinordertoreducetheoptical-powerchangingrangeofDM.Theperformanceofthefinalopticalsystemisdiffractionlimited.Atthesametime,theexperimentshavebeencarriedoutandtheresultsdemonstratetheeffecti
7、venessofthedeform-ablemirrorbasedonopticalzoomingwithoutmovingelementsinvolved.Keywordschangeablefocallength;deformablemirror;segmentedprimarymirror;opticalleveraging;收稿日期:2012-12-05基金項(xiàng)目:國(guó)家重大科技專項(xiàng)工程10航天返回與遙感2013年第