简介:针对二通插装阀弹簧的三维建模非常繁琐的情况,研究了在SolidWorks环境下,圆柱螺旋压缩弹簧参数化建模的方法。通过对SolidWorks中螺旋线参数进行设定,生产精确的弹簧参数化模型,将控制弹簧模型结构的特征尺寸为变量参数,通过编辑方程式,对相关的特征尺寸赋予不同的数值,可自动生成圆柱螺旋压缩弹簧的系列零件。结果表明,采用参数化建模的方法,可以显著提高二通插装阀弹簧建模的自动化程度。
简介:Wedemonstrateanangle-tunedsignal-resonatedopticalparametricoscillator(OPO)withperiodicallypoledlithiumniobate(PPLN)pumpedbyadiode-pumpedNd:YVO4laser.1499.8-1506.6nmofsignalwavelengthisachievedat140°Cbyrotatinga29-μmperiodPPLNfrom0°-10.22°inthex-yplanewhilekeepingthepumpwaveverticaltotheresonatormirrors.Twopairsofthesignalandidlerwavesofthesamewavelengthscanbeachievedsymmetricallyforeachpairofanglesofrotationwithsameabsolutevalueandoppositesign.Theoreticalanalysesonangle-tunedPPLN-OPOwithpumpwaveverticaltotheresonatormirrorsarepresentedandingoodagreementwithourexperimentalresults.Itisalsofoundthatallinteractingwavesinthecavity(notinsidethecrystal)arealwayscollinearforPPLN-OPOwiththepumpwaveverticaltotheresonatormirrorswhilephase-matchingisnoncollinearwithinthecrystal.
简介:利用Pro/E及其二次开发工具Pro/Toolkit实现端面传动蜗轮副的三维参数化设计。
简介:Adouble-slitghostinterferenceexperimentperformedonanentangledresourceusingtype-IInon-collineardegeneratespontaneousparametricdown-conversion(SPDC)isdemonstrated.Theinfluenceofthedistancebetweenthedouble-slitandthebucketdetectorprecededbyapinholeisstudied.Theexperimentalresultsshowthattheinterferencefringesbecomeincreasinglydistinctwithhighervisibilitywhenthepinhole-double-slitdistanceincreases.Afirst-orderclassicaltheorybasedontheKlyshko’stwo-photonadvanced-wavepicture,andasecond-orderquantum-imagetheoryareprovidedforexplanations.Thefittingresultsindicatethatthedivergenceoftheconvertedfluorescencesignificantlyaffectstheghostfringes.
简介:Aweakinfrared(IR)imageamplifierwithmorethan60-dBopticalgainandfrequencyup-conversionisdevelopedfromapicosecond(PS)355-nmpumpedgatedopticalparametricamplifier(OPA)inaβ-BaB2O4(BBO)crystal.TheIRimageat1064nmisamplifiedandup-convertedintothevisibleregionat532nmbyparametricamplificationandup-conversion.Withtheoptimizedopticalgain,thelowestdetectableenergyoftheimagecanbeaslowas1.8femto-Jouleperpulse,whichisthreeordersofmagnitudelowerthanthedetectionlimitofacharge-coupleddevice(CCD)camera.ThetransversalresolutionoftheOPAimagingisinvestigated,andtheapproachesforhigherdetectionsensitivityandhighertransversalresolutionareproposed.
简介:Aperiodicallypoledlithiumniobate(PPLN)opticalparametricgenerator(OPG)pumpedbyalaserdiode(LD)-pumpedQ-switchedTm,Ho:GdVO_4laseroperatedat2.048μmwithpumppulseof25nsandrepetitionrateof10kHzisreported.Acontinuoustunablemiddle-infrared(mid-IR)spectrumof3.88-4.34μmisobtainedbychangingthecrystaltemperaturefrom50to124°C.Whentheincidentpumppoweris3W,thetotalOPGoutputpoweris95mW,correspondingtoopticalconversionefficiencyof3.2%.
简介:Ahigh-repetition-rateeye-safeopticalparametricoscillator(OPO),usinganon-criticallyphase-matchedKTPcrystalintracavitypumpedbyapassivelyQ-switchedNd:GdVO_4/Cr~(4+):YAGlaser,isexperimentallydemonstrated.Theconversionefficiencyfortheaveragepoweris7%frompumpdiodeinputtoOPOsignaloutputandtheslopeefficiencyisupto10.3%.Withanincidentpumppowerof7.3W,thecompactintracavityOPO(IOPO)cavity,operatingat15kHz,producesanaveragepowerof0.57Wat1570nmwithapulsewidthasshortas6ns.Thepeakpowerat1570nmishigherthan6.3kW.
简介:阐述了Solidworks二次开发的机理,分析了VB编程语言在Solidworks平台上进行圆锥滚子轴承三维参数化开发的具体方法和步骤,用户只要轻松输入几个相关参数,就可以得到对应的轴承三维模型。