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如何测量您的成像系统中的景深
GaugingDepthofFieldinYourImagingSystemOvertheyears,wehaveansweredcountlessquestionsregardinglensperformance.Ofthosequestions,nonehavebeenmoredifficulttodefinethanrequestsfordepthoffield.Thereasonforthisdifficultyhasmoretodowiththevaguenesso...
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调制传递函数简介
IntroductiontoModulationTransferFunctionWhenopticaldesignersattempttocomparetheperformanceofopticalsystems,acommonlyusedmeasureisthemodulationtransferfunction(MTF).MTFisusedforcomponentsassimpleasasphericalsingletlenstothoseascomplexasamult...
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像素尺寸和光学元件
PixelSizesａndOpticsUnderstandingtheinterplaybetweencamerasensorsａndimaginglensesisavitalpartofdesigningａndimplementingamachinevisionsystem.Theoptimizationofthisrelationshipisoftenoverlooked,ａndtheimpactthatitcanhaveontheoverallresolutionoft...
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远心照明：为什么在机器视觉应用中需要它
ecentricIllumination:WhyYouNeedItinMachineVisionApplicationsImagingａndinspectionprojectsrequireprecisionopticalcomponentsａndalignmenttoachieveoptimalperformance.Thesemachinevisioninspectionapplicationsutilizeimaginglenses,illuminationsource...
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使用C型可调对焦镜头
UsingC-MountFocusTunableLensesIntroductionOptotuneElectricallyFocus-TunableLensesprovideflexible,fast-focusingsolutionsforawidevarietyofmachinevisionapplications,includingqualitycontrol,sorting,orbarcodereading.Unliketraditionalopticalsetup...
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在线照明注意事项
In-lineIlluminationConsiderationsIn-lineilluminationisauniquestyleoflightingthatincorporatestheilluminationintotheopticaltrainofthemachinevisionlens,usuallybymeansofafiberopticlightguideorLEDlightsourceａndabeamsplittingoptic.Althoughin-line...
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光偏振技术的成功
SuccessfulLightPolarizationTechniquesVideoａndmachinevisionsystemsrelyonelectronicimagersthattypicallyexhibitanywherefromeight-bittotwelve-bitsignal-to-noiseratio.Althoughsufficientformanyapplications,camerasinthiscategorymaybeproblematicinc...
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硅探测器的基本原理
BasicPrinciplesofSiliconDetectorsThroughthephotovoltaiceffect,silicondetectorsprovideameansoftransforminglightenergytoanelectricalcurrent.Therootofthetheorybehindthisphenomenonisasmallenergygapbetweenthevalenceａndconductionbandsofthedetecto...
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非轴抛物面镜的粗糙度
RoughnessofDiamondTurnedOff-AxisParabolicMirrorsSinglePointDiamondTurningisamanufacturingtechniqueforproducingoff-axisparabolic(OAP)mirrors,off-axiselliptical(OAE)mirrors,ａndotherprecisionmetalopticalcomponents.Whilethegoalofanyopticalmanuf...
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离轴抛物面镜的制造工艺和传统工艺的不同
离轴抛物面镜是*表面反射镜，其反射表面是组成原始抛物面反射镜的一部分。每个反射表面都具有原始抛物面无色差地聚焦准直光束或准直宽带点光源的能力。其全反射设计消除了透射光学元件会引入的位相延迟和吸收损耗。适合飞秒激光、红外、太赫兹应用。离轴抛物面镜的制造工艺和传统工艺是不同的，它致力于为航空/防卫应用提供大批量的更廉价的镜片。传统的OAPs制造工艺是通过挖切磨制，即从大的轴对称抛物面（母镜）进行挖切一部分下来进行抛光。显然，这种整体加工、分体割切成型的面镜磨制方案耗时长，低产量是...
