科技报道16 新型相机每秒可拍摄数十亿张照片.docx

科技报道16新型相机每秒可拍摄数卜亿张照片NewCameraTakesBi1.1.ionsofPicturesEverySecondp1.aystopmutemaxvo1.ume00:00-04:35repeatByJonathanEvans2015/1/19Imagineacamerathatcantakeonehundredbi1.1.ionpicturesasecond-thatisenoughtorecordthefastestmovementsintheuniverse.Butwedonothavetoimagineit,becauseascientisthasinventedsuchacamera.Heca1.1.sitanimagingsystem.ItmayseemHkesciencefiction,butitissciencerea1.ity.1.ihongWangisabiomedica1.engineeratWashingtonUniversityinSt.1.ouis,Missouri.He1.eadsateamofresearcherswhohavediscoveredsevera1.newimagingtechniques.“Forthefirsttime,humanscan1.itera1.1.ysee1.ightpu1.sestrave1.inginspaceatthespeedof1.ight."Thespeedof1.ightisa1.most300mi1.1.ionmeterspersecond.Atthatspeed,itwou1.dtakejustonesecondtotrave1.aroundthewor1.dseven-and-a-ha1.ftimes.Mr.Wangphotographs1.ightpartic1.esmovingatthatspeedusingauniquecamera.AscreengrabfromYouTubecapturedbyWang'snewimagingsystemshowsa1.aserpu1.sepropagatinginairandbeingref1.ectedfromamirror.(Credit1.ihongWang,WashingtonUniversity)*,Thestreakcameraisaveryspecia1.izeddevicethata1.1.owsustoconverttimeintospace.Weconvert1.ightpartic1.es,orphotons,intoe1.ectrons,thenpu1.1.thee1.ectrons,rea1.1.yhard,atdifferentrates,dependingonthetimeofarriva1.Sothetimeofarriva1.wi1.1.beconvertedintodifferentvertica1.positions/,Mr.Wang,snewtechno1.ogyimprovesonotheru1.tra-fastcamerasinimportantways.Unti1.now,streakcamerascou1.don1.ytakeaone-dimensiona1.photograph.Thatis1.ike1.ookingthroughavertica1.openingandtryingtotakeapictureofsomethingf1.yingbyrea1.1.yfast.Thefastestcamerashadtohaveanexterna1.,oroutside,1.ightsourcetowork.ButMr.Wang'Stechniquedoesnotneedspecia1.1.ighting.Itproducestwo-dimensiona1.images1.ikeregu1.arphotographs,butataspeedofoneimageevery10tri1.1.ionthsofasecond.BrianPogueisabiomedica1.engineeratDartmouthCo1.1.egeintheeasternAmericanstateofNewHampshire.Hereviewedthenewimagingsystemforthesciencepub1.icationNature.Hesaysthisnewwayofseeingthemovementof1.ightcou1.d1.eadtomajorscientificdiscoveriesinareas1.ikeoptica1.c1.oaking.“C1.oaking“isakindoftechno1.ogythatcanmakeanobject-1.ikeaspaceship-seemtodisappear.Mr.Poguesaysthemi1.itarywou1.d1.iketousec1.oaking.*,There'sa1.otofinterestingetting1.ighttobendaroundobjects,soitsortof1.ooks1.ikeyou'reseeingthroughthem.0BrianPoguesaysMr.Wang,snewsystem1.etsresearchersphotograph1.ightasitbends.Hesaystheyhavenotbeenab1.etodothatunti1.now.Hesaysthisdeve1.opmentcou1.dhe1.pmakeoptica1.c1.oakingarea1.ity.1.ihongWangimaginesotherusesforthenewcamerainsuchscientificfie1.dsasmo1.ecu1.arbio1.ogyandastronomy.Hesaysu1.trafastimagingcou1.d1.eadtonewdiscoveries.mJonathanEvans.CorrespondentVeronique1.aCaprareportedthisstoryfromSt.1.ouis,Missouri.JonathanEvanswroteitforVOA1.earningEng1.ish.ChristopherCruisewastheeditor.WordsinthisStoryastronomy-n.thescientificstudyofstars,p1.anets,andotherobjectsinouterspaceoptica1.-adj.re1.atingtoorusing1.ightc1.oak-v.tohideordisguisesomethingmo1.ecu1.e-n.thesma1.1.estpossib1.eamountofaparticu1.arsubstancethathasa1.1.thecharacteristicsofthatsubstancetechnique-n.awayofdoingsomethingbyusingspecia1.know1.edgeorski1.1.Whatwou1.dyouphotographwithsuchacamera?Whatinventionshaveyoureadaboutinsciencefictionbooksorseenonte1.evisionprogramsorinmoviesaboutthefuturethatyouwou1.d1.iketouse?Wewanttohearfromyou.Writetousinthecommentssection.