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时间:2020-04-30
《全场高分辨生物组织光学层析成像.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第41卷第8期中国激光Vo1.41,No.82O14年8月CHINESEJOURNALOFLASERSAugust,2014全场高分辨生物组织光学层析成像朱越高万荣(南京理工大学电光学院光学212程系,江苏南京210094)摘要建立了一套全场光学相干层析(FFOCT)系统,以实现对生物组织和细胞的高分辨层析成像。该光学系统基于Iinnik干涉显微结构。不同于现有FFOCT系统采用光纤束照明方式,采用卤钨灯照明和大数值孔径显微物镜成像,压电陶瓷(PZT)移相,面阵电荷耦合器件(CCD)采集干涉信号,由5步移相算法获
2、取层析图,最终合成三维图像。对整套系统的性能进行了详细的阐述与分析,并通过对洋葱表皮细胞和盆栽树叶的光学层析实验,验证了本系统的可行性和精确度。通过对集成电路内部芯片(英特尔奔腾4,横向分辨率达0.8um)成像,证明了该系统的分辨率可达到0.7“m×0.5m(横向×纵向)。提出的系统分辨率高、成本低、结构简单便于调节,为实现高分辨率光学相干层析成像提供了简单易行的方法。关键词成像系统;全场光学相干层析术;移相干涉术;生物组织中图分类号TN247文献标识码Adoi:10.3788/CJL201441.0804002
3、High-ResolutionFull-FieldOpticalCoherenceTomographyforBiologicalTissueZhuYueGaoWanrong(DepartmentofOpticalEngineering,SchoolofElectronicandOpticalEngineering,NanjingUniversityofScienceandTechnology,Nanjing,Jiangsu210094,China)AbstractAnovelfull—fieldopticalco
4、herencetomography(FFOCT)systemwithlowcostandhighresolutionisdevelopedforimagingofcellsandtissues.DifferentfromotherFF、0CTsystemsilluminatedwimopticalfiberbundle。theimprovedKShlerilluminationarrangementwithahalogenlampisusedintheproposedFFOCTsystem.Highnumeric
5、alaperturemicroscopicobjectivesareusedforimagingandapiezoelectricceramictransducer(PZT)isusedforphase-shifting.En-facetomographicimagescanbeobtainedbyapplyingthefive-·stepphase—shiftingalgorithmtoaseriesofinterferometricimageswhicharerecordedbyasmartchargecou
6、pleddevice(CCD)camera.Three—dimensionalimagescanbegeneratedfromthesetomographicimages.ImagingofthechipofIntelPentium4processordemonstratstheultrahighresolutionofthesystem(1ateralresolution0.8m),approachingthetheoreticalresolution0.7m×0.5m(1ateral×axia1).En-fa
7、ceimagesofcellsofonionsurfaceandpottedplantleavescellsshowtheexcellentperformanceofthesystemforgeneratingen—faceimagesofbiologicaltissues.Thesystemischaracterizedbyitshighresolution,lowcostandsimplearrangementforadjustment,providingapracticalmethodofperformin
8、gFFOCTimaging.Keywordsimagingsystems;full—fieldopticalcoherencetomography;phase—shiftinginterferometry;biologicaltissueOCIScodes110.4500;17O.6900;18O.3170;170.38801引言的深度信息,结合扫描成像方式,可实现对生物
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