简介:Alongwiththedevelopmentsonthehardware'stechniqueoftheLEDelectronicdisplay,thecontrolsoftwarewasalsoaskedtoadvancetoanewlevel.Theoldsoftwareofourcompanycouldn'tdemandnolonger.It'ssatisfythecustomer'snecessarytodesignanewplaysoftwaretoshowtheadvantagesoftheLEDelectronicdisplay.
简介:Alow-costlight-emittingdiode(LED)issufficienttopumpaquasi-continuous-wavebidirectionalhigh-Qwhispering-galleryresonatorlasermadeofNd:YVO4.ThisisremarkablebecauseoftheverylimitedspatialandspectralcoherenceofanLED.TheLED,deliveringupto3.5W,centeredaround810nm,isturnedoninintervalsof100μsduration,andfortheseperiodsalaseroutputexceeding0.8mWhasbeenverified.Furthermore,0.1-s-longlaserpulsesaredemonstrated.Tothebestofourknowledge,thisisthefirstdemonstrationofanLED-pumpedhigh-Qwhispering-gallerylaser.Theconceptcanbeextendedeasilytootherlaseractivematerials.AprospectisalsotopumpseveralofsuchlaserswithasingleLED.
简介:本文在评述低温绝对辐射计和SIRCUS发展的基础上,讨论了基于探测器标准的光谱可调谐自校准标准光源的工作原理、发展与应用前景。在探测器型光谱辐射标准研究方面,工作在液氦温度的低温绝对辐射计不确定度达0.01%。美国国家标准与技术研究院(NIST)建立的均匀光源光谱辐照度和光谱辐亮度响应度定标装置(SIRCUS)采用一系列激光器,由低温绝对辐射计传递的硅陷阱探测器定标,不确定度已达到0.1%,成功应用于空间遥感仪器高精度辐射定标。分析认为,发展中的基于探测器标准的光谱可调谐自校准标准光源,定标精度高,自行校正老化、衰减,保证了定标精度长期稳定。
简介:Inthepresentwork,theLEDchipwasirradiatedbyusing59.6MeVNionsinaterminalchamberoftheSector-focusedcyclotron(SFC)intheNationalLabortaryofHeavy-ionAcceleratorsinLanzhou.The63MeVNionspenetratedthroughagoldfoilandscatteredinalargearea.Theenergyofionwasreducedto59.6MeVafterscatteringofthegoldfoil.TheLEDwasprovidedbytheSemiconductorLightingCenterinInstituteofSemiconductorinBeijing.TheluminencesoftheLEDbefore/afterirradiationweretestedthroughaintegratingsphereinSemiconductorLightingCenterinInstituteofSemiconductorinBeijing.Theluminancewastestedunderacurrentof350mA.Fig.1showstherelationshipbetweentheluminencesandtheirradiationfluences.Theirradiationledto
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