锗的红外折射率精密测量

6　4　Vol.6,No.419988OPTICSANDPRECISIONENGINEERINGAugust,1998米宝永(中国科学院长春光学精密机械研究所　　长春　130022)　　　KGZ-Ⅱ,5～10.6μm,,,,±3×10-4。　　　　1　　　　　,,,,。,[1-5]。1962,MaxHerzberger14,,[1]。1973,R.P.Edwin[2]8～14μm。,1975Ben.C.Platt[3]95°K～298°K,2.5μm～12.3μm[4],±6×10-4()。1982,R.P.EdwinM.T.Dudermel[5]10,8～14μm±3×10-4。,1990365.0nm～12μm[6],1993。MaxHerberger,。2　　　22°,1:1998-04-24KGZ-Ⅱ,(I1)45°。Ⅰ、ⅡⅢ,,θI1,φI1=(180°-h)/2(1)　Fig.1　Themeasuringmethodofrefractiveindexofgermanium　　　Fig.2　Themeasuringmethedofvertexangle　　,KGZ-Ⅱ。,BC,2,β1、β2,AA=(U1-U2)/2(2)。I1、θAtan(I′1-A2)=tanA2tan(I1-θ+A2)cotθ+A2(3)I′1,n=sinI1/sinI′1(4)n。,,。3　　　Ⅰ、ⅡⅢ()5,5N-。14℃,p=105Pa,。R.P.Edwin[5]1982,13,λ=8μm,0.000406/℃。1。[1]124　6n=A+BL+CL2+Dλ2+Eλ4(5)L=1/(λ2-0.028)2,12。Δ,。Table1　measuringresultofrefractiveindexforgermaniumλ(μm)N-nΔ(×10-4)eλ(×10-4)eθ(×10-5)54.015104.01514-0.4±1.9±3.064.009874.01017-3.0±1.1±3.074.007384.00721+1.7±0.6±2.084.005134.00531-1.8±0.5±2.094.003864.00403-1.7±0.3±2.0104.003244.00317+0.7±0.2±7.010.64.003144.00280+3.0Table2.Contantstobeusedwiththedispersionformulaλ(μm)ABCDEfrom2.0to13.53.3999310.3917070.1634926×10-65.3×10-8　　,±0.03μm5～10.6μmeλ。(20°37″)、1″±4×10-5、2×10-57×10-6。1,。,,0.4℃,±1.6×10-4。,5μm±2.5×10-4,±2×10-4。,0.5mm,,±5×10-5。。。,。1　HerbergerMax,SalzbergCalvinD.Refractiveindicesofinfraredopticalmaterialsandcolorcorrectionofinfraredlenses.JOptSocAm,1962,52(4):422～4272　EdwinRP.Arecordingrefractometerforthemeasurementofrefractiveindicesofsolidsinthewave-lengthrange8～14μm.JPhysicsE:ScientificInstrm,1973,6(8):1035～10363　PlattBenC,LcanogleHW,etal.Techniqueformeasuringtherefractiveindexanditschangewithtem-1254　:　　　　　　　　　　　peratureintheinfraredrange.JOptSocAm,1975,65(11):1266～12674　LcenogleHW.PlattBenC.WolfeWilliamL.Refractiveindexesandtemperaturecoefficientsofgermani-umandsillicon.ApplOpt1976,15(10):2348～23525　EdwinRP,DudermelMT,etal.Refractiveindexmeasurementsoftengermaniumsamplies.ApplOpt,1982,21(5):877～8816　BaoyongMi.Acomputerizedphotoelectricrefractometer.ProcSPIE,1990,1230:193～195PrecisionMeasureemntoftheInfraredRefractiveIndexforGermaniumSampleMIBao-Yong(ChangchunInstituteofOpticsandFineMecanics,ChineseAcademyofSciences,Changchun130022)Abstract　　AuthormeasuredrefractiveindexofgermaniumdevelopedbyBeijingGeneralResearchInstituteforNon-ferrousMetalsinthewavelengthrangeof5～10.6μmbymeasofKGZ-ⅡModelPhotoelectricrefractometerwithhighaccurancyandcomparedmeasuredresultswithvaluecalculatedbythedispersionformula.Primaryfactorinfluencedmeasurementaccurancyisanalysedandthepaperresultswithaccurancyof±3×10-4aregot.Keywords:Infrared,Refractiveindex,Precisionmeasurement　,,1964。、。、、、CVD、、X、V,、。,,,“”。20。126　6