光學相位測量中余弦相位展開方法研究.pdf

1、分類號UDC密級臣刃多鄉(xiāng)夕戈孑碩士學位論文光學相位測量中余弦相位展開方法研究研究生姓名叁蕉指導教師姓名、職稱鹽亙垂塹握學科專業(yè)墊里塾至鱟研究方向出堡墾熊堡論文工作起止日期—呈塑曼生!旦二2Q咝生!旦淦義提交日期!垡Q壘生2旦ABSTRACTPhasemeasurementtechnologyisahighprecisemethodininterferencemeasurementandphaseprofilemeasurementFri

2、ngeskeletonsmethod，heterodyning，F(xiàn)ouriertransformmethodandphase—shiftingmethodaremajormethodsThephaseshiRingmethodhaspredominanceinphasemeasurementsuchashighprecision，highspeedofcalculation，theabiIitytosuppressnoiseinfrin

3、gesandasymmetryofimagesensor，butproduceaphasemapwhichiswrappedintherange一Ⅱto7【iScalledwrappingphaseduetotheperiodoftrigonometricfunctionInordertogettheoriginalphaseofthemeasuredphysicalquantity，theprocessofphaseunwrappin

4、gisneeded，andhasbecomethekeyofinterferometryMostofphaseunwrappingmethodsarebasedontangentwrappingphase，andthetangentphaseunwrappingmethodshavethedisadvantageswhichcan’tbefilteredandcan’tjudgethephaseshiningprecisionByuse

5、ofthephase—shiftingtechnology，thebackgroundandamplitudeofinterferencehingescanbeobtained，andanovelphaseunwrappingmethodbasedoncosinefunctionisproposedThetimeserialinterferefringesarerecorded，andthenthephasecosinefunction

6、ScanbeobtainedbyremovingthebackgroundandamplitudefromthefringesThearccosinefunctionsofphaseCOsinefunctions，whicharecalledphasecosiDewrappingfunctioninthispaper，canbeunwrappedbyutilizingtheadditionalnormalorientationinfor

7、mationTheexperimentalanalysesshowthathighprecisecosineunwrappingphasecanbegeteitherbypathdependencephaseunwrappingmethodorbypathindependentleastsquaresphaseunwrappingmethodThecharactersofCOsinewrappingphaseareanalysisint