学科分类
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500 个结果
  • 简介:分光计小型化用即时、所在地大小打开一个新申请区域。Fourier变换分光计(英尺)就它在途径之中特别优点而言是吸引人。这份报纸考察微英尺的当前地位在世界范围并且描述它开发;另外,分析了是在设计并且制作英尺在小型化期间被解决关键问题。最后,没有动人部分微英尺一个新奇模型被建议并且分析,它可以为分光计设计提供新概念。

  • 标签: 傅立叶变换 分光计 执行器 小型化 干涉仪
  • 简介:Theoptimumparametersarecalculatedbythelargecross-sectiontheoryandmodecut-offequation.Theeffectonreversebiasvoltagesinanalysedbythedopingconcentrationinn^+-Si.Theissignificantbecausethereversebiasincreasessharplywhenthedopedconcentrationinn^+-Siislessthan1×10^20cm^-3.

  • 标签: 硅化锗 光检测器 波导
  • 简介:我们介绍为制造采用一些技术和设备悦耳微光学。基于膜microlenses和扫描镜子具有对这个区域学术、工业兴趣悦耳液体透镜和透镜数组以及聚合物。

  • 标签: 微光学 纳米技术 子源 集成光学
  • 简介:Inthispaper,wepresentahighspeedautofocussystemformicrosystemapplicationsanddesignalook-up-tablebasedautofocusingalgorithmforapplicationswhenatargetobjectisalwaysvisible,e.g.,manufacturingpartswithalignmentfiducials.Weperformanevaluationof24focusmeasurestoverifythatwhichfocusmeasureisthebestforthelook-up-tablebasedmethod.Fromtheevaluation,wefindthattheChebyshevmoments-basedfocusmeasure(CHEB)isthemostsuitable.Furthermore,wealsodevelopalook-up-tablebasedautofocussystemthatusesCHEBasthefocusmeasure.Intrainingphase,weofflineconstructatablefromtrainingimagesofanobjectthatarecapturedatseverallensdistances.Eachentryoftableconsistsoffocusmeasurecomputedfromimageandlensdistance.Inworkingphase,givenaninputimage,thealgorithmfirstcomputesthefocusmeasureandthenfindsthebestmatchfocusmeasurefromthetableandlooksupthecorrespondinglenspositionformovingitintothein-focusposition.Ouralgorithmcanperformautofocusingwithinonly2stepsoflensmoving.Theexperimentshowsthatthesystemcanperformhighspeedautofocusingofmicroobjects.

  • 标签: 自动对焦系统 微系统 应用 自动聚焦算法 训练图像 镜头运动
  • 简介:Anoveldischargedeviceisdesignedonthebasisoftheconfigurationofmicro-hollowcathodedischarge(MHCD).ByusingmanyMHCDsinparallelconnection,amicro-dischargearraycanbeconstructed.Withthemicro-dischargearray,ahigh-pressurehigh-currentdensityglowdischargeplasmascanbeformedtomakeaplasmadisplaypanel(PDP).Anairdischargeexperimentisfinishedwiththedischargedevice.Thestabledirectcurrentglowdischargeisformedunderthepressurefrom20Torrto500Torr.Thevoltage-currentcharacteristiccurveandthedischargephotographarenoted.Thevoltage-currentcharacteristiccurvehasapositivedifferentialresistancecoefficientonthewholedischargerange.Theestimatedcurrentdensityreaches70.1A/cm3,thepowerdensityis3.6×104W/cm3,andtheelectrondensityisintheorderof1013cm-3atp=200TorrandID=10mA.TheexperimentalresultsindicatethatthedesigneddischargedeviceisappropriateforPDP.

  • 标签: 等离子显示器 面板 放电装置 驱动程序
  • 简介:<正>日本产业技术综合研究所日前发布消息说,他们通过自行开发"大容量高纯度臭氧发生装置"生产出浓度高于90%臭氧,并成功使用这种超高浓度气体在400摄氏度较低温环境下制造出高品质硅氧化膜。

  • 标签: 硅氧 臭氧发生装置 日本产业 综合研究所 低温环境 鼻高
  • 简介:Dopedmicro-crystallinesiliconfilmsaredepositedattemperaturesaslowas400℃bythecatalyticchemicalvapordepositionmethodusingasilaneandhydrogengasmixture.ElectricalpropertiessuchasthecarrierconcentrationandtheHallmobilityareinvestigatedforvariousmeasuringtemperatures.Itisfoundthatthegrainsofmicro-crystallinesiliconarepreferentiallyorientedalongthe(220)direction,andthattheHallmobilityislargerthan8cm^2·V^-1·s^-1,thecarrierconcentrationisabout1×10^17cm^-1-1×10^19cm^-3atroomtemperature.

  • 标签: 化学气相沉积 霍尔迁移率 微单晶硅 载波传输性
  • 简介:目标结构机械颤动调制雷达backscattering阶段函数,并且将从目标导致返回信号频率调整。它产生目标身体Doppler频率乐队转移一个方面,它对目标识别有用。基于这,micro-Doppler原子宝库为目标识别被造,并且四种普通分类器独立被使用执行分类识别。模拟试验性结果证明这个方法让高识别超过90%评价。

  • 标签: 雷达目标 显微多普勒效应 信息处理 后向散射
  • 简介:Thepropertyofsiliconmicro-capacitiveaccelerometerisanalyzedanddiscussedbyestablishingthemodelofthesensor,tolayabasisforoptimizationdesignofsensorsystemstructure.Discussedissuesincludethestaticmodelinganddynamicbehaviorofthetwocommnlyusedstructures,i.e.,double-cantileversupportedandfour-beamsupportedstructures,andalsothemeasurementrangeofthesedevices.

  • 标签: 电容加速度计 脉冲带宽调制 硅微机械 优化设计
  • 简介:计量学精确上要求在半导体生产区域是特别紧。这在面具和硅晶片和他们相应参考计量学上特别地为最小结构线宽测量和控制成立。在这篇论文,我们描述物理模型和在PTB为光罩线宽计量学被开发参考书乐器学。它将被显示出,不同方法结果怎么能被用于比较分析。这些方法应用程序根据最新发达光罩线宽标准作为模范地被演示。

  • 标签: 微纳米技术 计量方法 集成光学 特征
  • 简介:Micro-structures3-Dprofilemeasurementisanimportantmeasurementcontentforresearchonmicro-machiningandcharacterizationofmicro-dimension.Inthispaper,anewmethodinvolved2-Dstructuretemplate,whichguidesphaseunwrapping,isproposedbasedonphase-shiftingmicroscopicinterferometry.Itisfitnotonlyforstaticmeasurement,butalsofordynamicmeasurement,especiallyformotionofMEMSdevices.3-Dprofileofactivecombofmicro-resonatorisobtainedbyusingthemethod.Thetheoreticprecisioninout-of-planedirectionisbetterthan0.5nm.Thein-planetheoreticprecisioninmicro-structuresisbetterthan0.5μm.Butattheedgeofmicro-structures,itisonthelevelofmicrometermainlycausedbyimpreciseedgeanalysis.Finally,itsdisadvantagesandthefollowingdevelopmentarediscussed.

  • 标签: 微观结构 光检测技术 三维测量 干涉测量
  • 简介:高温度液体被注入微尺寸毛状并且它轻繁殖行为被调查。我们集中于抽方法二不同液体。第一个方法能把高温度液体听输入微尺寸由使用一个高压力差别系统毛状。在抽以后,与光搬运人一起连接单个模式纤维(SMF)基于微波interferometry(OCMI)系统被用来测量不同液体听层次在微尺寸毛状。第二个方法能把房间温度引擎油输入由使用注射泵毛状。当液体被输入时,这个方法能避免空气水泡毛状。

  • 标签: 高温液体 毛细管 微尺度 光传输 差分系统 微波干涉仪
  • 简介:为了完成操纵者软掌握,工作,钥匙是有与好性能滑动传感器。取决于弹性体和光电元素在手里安装了,传感器转变在掌握目标和机器人手之间滑动到电信号,因此,滑动能被检测。它当目标是滑动时,愿望原因弹性体是微颤动。基于颤动理论,动态理论,轻紧张理论和有弹性变丑理论,发源是目标是机器人手有的滑动加速relativingto结论与光电元素产量线性关系电压微分,然后为滑动区分模型被建立。

  • 标签: 滑动传感器 发送器 光电效应 振动检测
  • 简介:<正>菱电机在安徽省设立了生产功率半导体模块合资公司。系与其组装及测试工序制造受托方捷敏电子(上海)有限公司合办,将从2012年1月开始生产。据称,计划2015年将在华组装及测试工序产能扩大2011年2倍。新公司名为"菱电机捷敏功率半导体(合肥)有限公司"。资本金为500万

  • 标签: 三菱电机 功率半导体 受托方 捷敏 出资比例 员工人数
  • 简介:AnovelLD-pumpedsingle-frequencymicro-chipgreenlaserispresented.ByusingthecombinationofshortcavityandLoytfilterformedbyRochonprismandKTPcrystal,astablesinglefrequencygreenlaserisobtainedwith60mWoutputat500mWLD-pump.Theoptical-to-opticalconversionefficiencyisabout12%.Theopticalcontactbetweencomponentsofthelaserisadopted.Thislaserhastheadvantagesofacompactstructureandalowcost.

  • 标签: LD泵浦 微芯片 绿光激光器 单频 激光光学元件 绿色激光
  • 简介:Atpresent,boththepointsourceandtheimagingpolarizationnavigationdevicesonlycanoutputtheangleinformation,whichmeansthatthevelocityinformationofthecarriercannotbeextractedfromthepolarizationfieldpatterndirectly.Opticalflowisanimage-basedmethodforcalculatingthevelocityofpixelpointmovementinanimage.However,forordinaryopticalflow,thedifferenceinpixelvalueaswellasthecalculationaccuracycanbereducedinweaklight.Polarizationimagingtechnologyhastheabilitytoimproveboththedetectionaccuracyandtherecognitionprobabilityofthetargetbecauseitcanacquiretheextrapolarizationmulti-dimensionalinformationoftargetradiationorreflection.Inthispaper,combiningthepolarizationimagingtechniquewiththetraditionalopticalflowalgorithm,apolarizationopticalflowalgorithmisproposed,anditisverifiedthatthepolarizedopticalflowalgorithmhasgoodadaptationinweaklightandcanimprovetheapplicationrangeofpolarizationnavigationsensors.Thisresearchlaysthefoundationfordayandnightall-weatherpolarizationnavigationapplicationsinfuture.

  • 标签: POLARIZED optical flow algorithm IMAGING BIONIC
  • 简介:Aneffectivedesignmethodoffreeformmicrolensarrayispresentedforshapingvariedlaserbeamsintoprescribedrectangularillumination.Thevariableseparationmappingisappliedtodesignconcavefreeformsurfacesforconstructingafreeformlensarray.Severaldedicatedexamplesshowthatthedesignedfreeformopticallensarraycanachieveaprescribedrectangularilluminationpattern,especiallywithoutconsideringtheinitialstatesofincidentlaserbeams.Bothhighcollectionefficiencyandgoodspatialuniformitycanbeavailablesimultaneously.Toleranceanalysisisalsoperformedtodemonstratethatthisopticaldevicecanwellavoidfabricatingdifficultyinactualapplications.

  • 标签: 微透镜阵列 自由曲面 空间均匀性 激光束 矩形 成型机
  • 简介:Laser-inducedbreakdownspectroscopy(LIBS)hasbeenextensivelyappliedduetothecapabilitiesofreal-time,multi-phaseandmulti-elementanalysis.Withtheadvantages,portableLIBSisinrapiddevelopmentwithgreatpotentialoffieldmeasurements.Inthiswork,aportableLIBSwasdevelopedbya50μJlevellaserforexcitationandanobjectivelensforfocusingorimaging.Elementdetectionwassuccessfullyachievedbythissetup,andalsothemicroscopicobservationcouldbeobtainedwiththemagnificationof350×.ApreliminaryinvestigationwascarriedoutformineralrecognitionbythedevelopedportableLIBS.Theobtainedresultsindicatethattheelementdetectioncombinedwithmicroobservationwasaneffectivewayforrecognizingminerals,especiallyforsimilarmineralidentificationordiscrimination.Itissuggestedthatthemicro-joulelasercouldbealternativeforthecommercialportableLIBS,andtheon-sitemineralorrockrecognitionisapromisingfieldfortheapplication.

  • 标签: LIBS MINERAL RECOGNITION multi-element analysis