简介：1.前言近年来,在双面印制板和多层用内层板的制造过程中,随着光敏阻焊剂的推广应用,为了避免两面相互影响、产生重影(GHOSTIMAGE),要求基板必须具有屏蔽紫外线(UVBLOCK)的功能。在印制板检测方面,自动光学检测(AOI)

简介：Amethodforfabricationofultravioletinducetransmission(IT)filterbyvisiblelightcontrolinanordinaryvacuumispresented.Manufacturingprinciplesandtechniquesaredisscussed.MeasuredspectraltransmittancecurvesofmakingultravioletITfilterbythismethodaregiven.

简介：UVwavelengthauto-tunedoutputsystemisrealizedbythedifferencemethod.Controlledbythemicroprocessor,outputwavelengthauto-trackingisachieved.Besides,equipmentself-checkingauto-positioningandtemperaturecorrectarerealized.Thewavelengthtunedoutputefficiencyintheexperimentisbetterthan97%.

简介：UV就是UltravioletRay的英文简称，也称紫光线光固化上光。UV固化技术自20世纪60年代发明以来，到20世纪末已经得到了普遍应用。在我国，UV印刷和UV上光已经被广泛应用在铝箔纸和铝箔卡纸印刷，磁卡印刷，商业印刷，金属印刷，食品包装印刷（饮料杯，快餐盒等)，不干胶印刷等领域，尤其在丝网印刷（玻璃，木制品，塑料薄膜等非吸收性材料)领域更是大显身手。UV上光技术的应用前景非常广阔。

简介：随着计算机技术、信息技术、激光技术和新材料技术的迅速发展，从20世纪后期，成像技术从模拟成像进入了数字成像新时期，数字成像的应用领域也在快速的拓宽。数字成像技术在照相上应用除了数码相机、数码冲扩机、数码摄像机外还发展为网上冲扩通过互联网受理影像打印服务。数字成像技术在医疗诊断中的应用，利用CCD图像传感器把X射线拍摄的图像数字化，

简介：WehaveUV-inscribedfiberBragggratings(FBGs),long-periodgratings(LPGs),andtiltedfibergratings(TFGs)intomid-IR2μmrangeusingthreecommonopticalfibergratingfabricationtechniques(two-beamholographic,phasemask,andpoint-by-point).ThefabricatedFBGshavebeenevaluatedforthermalandstrainresponse.IthasbeenrevealedthattheFBGdeviceswithresponsesinmid-IRrangearemuchmoresensitivetotemperaturethanthatinnear-IRrange.Toexploretheuniquecladdingmodecouplingfunction,wehaveinvestigatedthethermalandrefractiveindexsensitivitiesofLPGsandidentifiedthatthecoupledcladdingmodesinmid-IRrangearealsomuchmoresensitivetotemperatureandsurroundingmediumrefractiveindexchange.The45°tiltedfibergratings(45°-TFGs)aspolarizingdevicesinmid-IRhavebeeninvestigatedfortheirpolarizationextinctioncharacteristics.Asefficientreflectionfiltersandin-cavitypolarizers,themid-IRFBGsand45°-TFGshavebeenemployedinfiberlasercavitytorealizemulti-wavelength2μmTm-dopedCWandmodelockedfiberlasers,respectively.

简介：Theultraviolet(UV)bandedgephotorefractivityofLiNbO_3:Zrat325nmhasbeeninvestigated.Theexperimentalresultsshowthattheresistanceagainstphotorefractionat325nmisquiteobviousbutnotasstrongasthatat351nm,whenthedopingconcentrationofZrreaches2.0mol%.ItisreportedthatthephotorefractivityinothertetravalentlydopedLiNbO_3crystals,suchasLiNbO_3:HfandLiNbO_3:Sn,isenhanceddramaticallywithdopingconcentrationoverthreshold.HerewegiveanexplicitexplanationonsuchseemlyconflictingbehaviorsoftetravalentlydopedLiNbO_3,whichisascribedtothecombinedeffectofincreasedphotoconductivityandtheabsorptionstrengthofthebandedgephotorefractivecenters.

简介：Inthispaperthesolar-blindultraviolet(UV)lightisusedascommunicationmediumforwirelesssensornetworks(WSNs).ThreetypesofsinglescatteringUVcommunicationmodelsareintroducedandadirectionalfloodingmodelisproposed,whicharebasedonthedirectionalityoftheUVcommunicationandthetraditionalfloodingroutingmodel.Thedelay,delayjitter,throughputandenergyconsumptionofthethreetypesofcommunicationsofthenewmodelaresimulatedandcompared.Theresultsindicatethattheproposeddirectionalfloodingmodelcaneffectivelyavoidtheunidirectionalityandtheblindnessofthetraditionalfloodingbroadcastmessages.Theenergyconsumptionofnodesinthenetworkisreducedandthelifecycleofthenetworkisextended.

简介：因为紫外可见的吸收度察觉者不能避免的一般多波长源于光的紧张变化的噪音和飘移采购原料，双横梁多波长紫外可见的察觉者基于电荷耦合器件被设计。在它通过chopper以后，轻来源的光线被横梁splitter划分成一条信号光线和一条引用光线。信号光线照耀进样品房间。通过样品房间的信号光线失败到集中它到被一个凹面栅栏在电荷耦合器件的一部分上想象的槽上的一面凹面镜子上。参考光线被凹面栅栏在槽以后在电荷耦合器件的另外的部分上想象。信号光谱，引用光谱和电荷耦合器件的黑暗水流能在光系统的合作下面在一样的电荷耦合器件上被测量并且补助电路。为由使用参考光谱和电荷耦合器件的黑暗水流的信号光谱的即时赔偿能有效地压抑察觉者的噪音和飘移。短期的噪音是10?5AU和飘移是10?4AU/h。CLC数字TN366文件代码A

简介：由于在PWB设计中不断增加高密度线路的要求,驱使印制线路板(PWB)的阻焊膜(或焊接掩膜)技术的逐步发展。光成像技术已普遍地用来形成阻焊膜图形和改善PWB生产精细阻焊膜性能的能力,但是,由于紫外光(UV)通过阻焊膜/层压板基体而产生的穿

简介：近日．爱克发公司宣布自己的UV固化油墨已经被允许使用在Xaar的OmniDot760打印机头上．而这个打印头是由这两家公司联合开发的。爱克发公司为Xaar打印头开发了一系列UV固化油墨，并能用这些油墨生产出多种高质量且持久性强的室内外彩色印刷品。