细丝直径测量的设计性实验-殷鹏飞

221　　　　　　Vol.22No.1200903PHYSICALEXPERIMENTOFCOLLEGEMar.2009:2008-08-27:1007-2934(2009)01-0064-05殷鹏飞1　孙丽丽2　韩向宇1　史玲娜1　周　平1　胡成华1(1.,,400074;2.,,400038)　　,。。　;;:O4—33　　　　:A1　,,,。、。,,,,。,,,,。,,,[1]。,[2]。。2　,.,:,,,;。。:2.1　[3]1,12,。,。A、B,—64—,,,,,,,。,A、BL:L=nλ2,n,。1　,:υ=T/ρ,T,ρ。、:υ=fλ,:ρ=n2T4f2L2ρρ′:d=2ρ/πρ′2.2　[4],,。2　2,Ld2λ,:—65—I=I0sin2(πdsin/λ)(πdsin/λ)2dsinK=±kλ,k=1,2…,kxKxKL,:d=kLλxK=LλS:S,d,L。Lλ,SxK,d。2.3　[5,6]。。,,。(a)(b)3　3a,,、。,e,:δ=2e+λ2e,,:2e+λ2=kλ,k,k=1,2,3……,2e+λ2=(2k+1)λ2,k=0,1,2……,,e,(),3b。k()ee=kλ2,λ。L,()d,Ln,kd=nL,ed,kkd,d=nLλ2,λ,nL,d。—66—2.4　[7]4,,PS,M1,M2M3,,CCD。4　55,DdY,45°。,45°,,y=±2R/2,Z=2R/4。OP,I=2A201+cos2πr2Rλ(D-2R/4):Δy=λ(D-2R/4)2R≈2λDdCCD。,D,λ,d。3　。,,,。,,,。[1]　.[J].,2006[2]　.、[J]..2006[3]　　.[J].(),2006[4]　、、.[J].(),2003—67—[5]　　、、.[J].,2003[6]　　、.[M].2007[7]　　、、.[J].,1999DESIGNINGEXPERIMENTOFTHEFILAMENTDIAMETERMEASUREMENTYinPengfei1　SunLili2　HanXiangyu1　ShiLingna1　ZhouPing1　HuChenghua1(1.ChongqingjiaotongUniversity,Chongqing,400074)(2.TheThirdMilitaryMedicalUniversity,Chongqing,400038)Abstract:Astheimportantcontentofthecollegeexperimentteaching,pivotaltacheofthedesigningexperimentarethedesignoftheexperimentscheme.Thearticlelistseveralmeasuremethodofthedesigningexperimentaboutthefilamentdiametermeasurement.KeyWords:designingexperiment;filamentdiameter;measurement—68—