利用信息熵法測量粒子的軸向位移及應(yīng)用.pdf

1、中國科學(xué)技術(shù)大學(xué)碩士學(xué)位論文利用信息熵法測量粒子的軸向位移及應(yīng)用姓名：鮑建華申請學(xué)位級別：碩士專業(yè)：光學(xué)指導(dǎo)教師：李銀妹樓立人20050501中國科技大學(xué)碩士畢業(yè)論文摘要關(guān)鍵詞：光鑷、信息熵、圖像、軸向位移、光阱剛度、光阱逃逸力AbstractOpticaltweezerswasconsideredasamanipulationtoolformicrosphereswhenitwasjustinventedTherehavebeenso

2、meimportantachievementsintheresearchfieldofbiologyandcolloidphysicsInmostofitsapplicationsitisnecessarytoaccuratelymeasurethebead’spositionordisplacement，especiallyfortheinvestigationonthebiomacromoleculesInthepaper，seve

3、ralmeasurementmethodsofthebeaddisplacementwasintroducedwithQDandCCDasdetectorinopticaltweezerssystemItwasfoundthatitisnecessarytodevelopanewmethodinapplications，formeasuringtheaxialdisplacementofabeadwithCCDInthisthesis，

4、aconvenientmethodtomeasuretheaxialdisplacementofthebeadtrappedwasanalyzedanddiscussedwithCCDThenewmethodbasedonShannon’sInformationEntropyisdevelopedWhenthebeadisinadifferentaxialposition，thevalueofinformationentropyofit

5、simageisdifferentThekeyofthemethodiscalibratingtherelationbetweentheinformationentropyandtheaxialdisplacementInthepapertheexperimentalmethodforaxialpositionmeasurementofastaticbeadandasuspendedbeadisintroducedinturnThere

6、sultswitha3∥卅diameterpolystyrenesphereindicatewhenthebeadmovesinacertainaxialrange，therelationbetweentheinformationentropyandtheaxialdisplacementislinearandthelinearrangeoftheaxialdisplacementislargerthan2“塒withasensitiv