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1.中国科学技术大学 生物医学工程学院,安徽 合肥 230026
2.中国科学院 苏州生物医学工程技术研究所 江苏省医学光学重点实验室, 江苏 苏州 215163
[ "纵浩天(1996-),男,安徽宿州人,硕士研究生,2014年于安徽大学获得学士学位,主要从事数字全息成像方面的研究。Email:zht12138@mail.ustc.edu.cn" ]
[ "张运海(1975-),男,湖北襄阳人,教授,研究员,博士生导师, 1998年、2006年于南京航空航天大学分别获得学士、博士学位,现为江苏省医用光学重点实验室副主任,主要从事激光扫描共聚焦成像、超分辨显微光学方面的研究。Email:zhangyh@sibet.ac.cn" ]
收稿日期:2020-08-28,
修回日期:2020-10-21,
纸质出版日期:2021-01-15
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纵浩天,张运海,王发民等.大视场线扫描共聚焦全息显微成像[J].光学精密工程,2021,29(01):1-9.
ZONG Hao-tian,ZHANG Yun-hai,WANG Fa-min,et al.Large field of view line-scanning confocal holographic microscopy[J].Optics and Precision Engineering,2021,29(01):1-9.
纵浩天,张运海,王发民等.大视场线扫描共聚焦全息显微成像[J].光学精密工程,2021,29(01):1-9. DOI: 10.37188/OPE.20212901.0001.
ZONG Hao-tian,ZHANG Yun-hai,WANG Fa-min,et al.Large field of view line-scanning confocal holographic microscopy[J].Optics and Precision Engineering,2021,29(01):1-9. DOI: 10.37188/OPE.20212901.0001.
传统显微成像一般记录样本的强度信息,对于半透明或相位组织成像对比度较差。为实现相位组织非荧光标记成像,采用线扫描共聚焦全息成像方法,在线扫描共聚焦成像的基础上增加一路参考光,在共聚焦狭缝处形成离轴像面数字全息,通过控制样本的移动实现对样本的扫描,将获得的干涉线合成为二维全息图,通过频域滤波的方式获得振幅与相位分布,采用相邻剖面相似的特性校正环境振动引起的相位横纹,并且通过多区域扫描拼接实现大视场全息成像。对USAF1951分辨率板进行线扫描共聚焦全息成像,采用抖动校正算法,使本实验重建相位图中的抖动横纹降低了84.7%,获取3个子区域图,通过图像拼接达到1 160 μm×1 043 μm的成像视场,扫描更多的子区域可以获取更大的视场,并且对洋葱表皮细胞实现共聚焦相位成像。实验结果表明了该线扫描共聚焦全息成像方法可以实现对半透明样本的大视场相位成像,为相关仪器研制提供了指导与依据。
Traditional microscopic imaging generally records the intensity information of a sample, but the contrast is poor for translucent or phase tissue. To realize phase tissue non-fluorescence labeling imaging, a line-scanning confocal holographic imaging method was adopted. In line-scanning confocal imaging, a reference light was added to form off-axis image plane digital holography at the confocal slit. The sample was scanned by controlling the movement of the sample. The interference lines obtained were combined to form a two-dimensional hologram, and the distribution of amplitude and phase was obtained by filtering in the frequency domain. The phase striation caused by environmental vibration was rectified using the characteristics of adjacent sections, and large field-of-view holographic imaging was realized by multi-area scanning and splicing. A USAF1951 resolution plate was imaged by line scanning confocal holography, and a jitter correction algorithm was used to reduce the jitter stripes in the reconstructed phase map by 84.7% to obtain three sub-area maps. An imaging field of 1 160 μm × 1 043 μm was achieved by splicing; scanning more sub-regions can help in obtaining a larger field of view and in realizing confocal phase imaging of onion epidermal cells. The experimental results show that the line-scanning confocal holographic imaging method can realize large-field phase imaging of translucent samples and provide guidance and a basis for the development of related instruments.
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