简介:Inthelaserwarningsystem,anon-mechanicalscanningFabry-Perot(F-P)typelaserwarningmethodanditscrucialcomponent-laserincidentsensordesignmethodarebroughtout,andtheF-Petalonwiththeinterferometricfiltercombinationisadopted.Fortheincidentlaserpulsewithacertainwavelength,thetransmittancedifferenceoftheinterferometricfiltersisindependentwithpolarizationofincidentlight,anddescendsalmostlinearlyastheincidentanglegetswider.Alaserincidentanglesensorexperimentalplatformisbuiltup,andtheexperimentiscarriedoutwithagivenlaserrangefinder.Astheresultsindicate,whentheincidentangleislessthan5o,thetransmittancedifferencemeasuredbythelaseranglesensorissignificantlylower,andthedeviationismorethan10%.Whiletheincidentangleisgreaterthan10o,thedeviationisreducedsignificantly.
简介:通过分析F-P扫描干涉仪的工作原理,基于STC89C52RC单片机,采用PA93功率放大器驱动压电陶瓷,设计了1064nm平平腔结构的F-P扫描干涉仪。腔镜反射率为98%,精细度156,腔长0.1~100mm连续可调,对应自由光谱区1.5~1500GHz和分辨率9.65~9650MHz。压电陶瓷驱动电压和频率通过4×4矩阵键盘,可以在0~200V和1~30Hz连续可调,显示在1602液晶屏上。同时可以通过RS232串口与计算机通讯,在上位机使用LabVIEW软件界面方便地设置压电陶瓷驱动电压和频率。最后使用该F-P扫描干涉仪,对激光二极管泵浦Nd:YVO4激光器纵模进行了测量,验证了整个系统的工作性能。
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简介:LetGbeagraphwithvertexsetV(G)andedgesetE(G)andletgandfbetwointeger-valuedfunctionsdefinedonV(G)suchthat2k-1≤g(x)≤f(x)forallx∈V(G).LetHbeasubgraphofGwithmkedges.Inthispaperitisprovedthatevery(mg+m-1,mf-m+1)-graphGhas(g,f)-factorizationsrandomlyκ-orthogonaltoHandshownthattheresultisbestpossible.