1、塑婆奎蘭堡主蘭垡笙壅魚(yú)致謝本論文是在導(dǎo)師趙道木教授的大力支持和悉心指導(dǎo)下完成的。趙老師嚴(yán)謹(jǐn)求實(shí)的治學(xué)態(tài)度、兢兢業(yè)業(yè)的工作作風(fēng)和大膽創(chuàng)新的進(jìn)取精神對(duì)我產(chǎn)生了積極的影響，并已成為我學(xué)習(xí)的楷模。感謝導(dǎo)師帶我進(jìn)入科學(xué)研究的圣地，在此特向趙老師致以最誠(chéng)摯的敬意和最衷心的感謝!、同時(shí)在此對(duì)梅掌榮博士生和蔣惠蓮碩士生、杜新悅碩士生的關(guān)心表示衷心的感謝另外，還要特別感謝同研究課題組的陳林飛博士生、謝前森碩士生，在完成論文的過(guò)程中提出了許多寶貴的意見(jiàn)和建

2、議。最后，深深感謝我的父母、哥哥及女友，感謝他(她)們?cè)谝恢币詠?lái)對(duì)我的關(guān)心和支持本論文得到了國(guó)家自然科學(xué)基金委與中國(guó)工程物理研究院聯(lián)合基金課題(10276034)的資助。汪小剛2006年5月于浙江大學(xué)ABSTRACTOpticalinformationprocessing，whichhasbeendevelopingoverfortyyears，isaveryimportantpartofinformationscienceTherap

3、idlydevelopingfractionalFourieropticsprovidesthetheoreticalfoundationforopticalinformationprocessingTheapplicationofopticalfractionalFouriertransformsoninformationprocessinghasbeenoneofthemostactiveresearchfieldsofinform

4、ationscienceinrecentyearsAlargenumberofliteraturesaboutopticalinformationprocessingmethodsbasedonfractionalFouriertransformshavebeenpublishedInthisthesis，wefocusontheapplicationoffractionalFouriertransforminopticalinform

5、ationencryptionandimageprocessingThewholethesisisorganizedasfollows：InChapter1，abriefintroductiontoopticalinformationprocessingincludingitsresearchprogressinopticalencryptionandimageprocessisgivenResearchmethodsandbasict

6、heoriesusedinthisthesisareemphasizedTheopticalencryptionmethodcombiningfractionalFouriertransformanddoublerandomphasemaskencodingtechnologyarcdiscussedindetailinChapter2Theoreticalexplanationandnumericalsimulationsshowth

7、ealgorithmsproposedaremoresecurecomparetothatbasedonFouriertransformBasedonthemethodsintroducedinChapter2，theencryptionalgorithmcombiningfractionalFouriertransformanddigitalholographywhichincreasestheinformationsecurityi

8、sproposedinChapter3OneofthekeysfordecryptionisstoredasadigitalholograminthismethodInChapter4，opticalinformationsynthesisandencryptiontechnologybasedonfractionalFouriertransformandphaseshiftinginterferometerisproposedItca

9、nbeshownthatopticalinformationcanbeefficientlystored，transmitted，recoveredandsynthesizedwithhilghsecuritybycombiningopticaltechnologiesanddigitalmethodsInChapter5，anewopticalimageencryptiontechniquebasedonanamorphicfract