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面向高通量的多通道复用数字全息成像技术

黄郑重 曹良才

黄郑重, 曹良才. 面向高通量的多通道复用数字全息成像技术[J]. 中国光学(中英文). doi: 10.37188/CO.2022-0070
引用本文: 黄郑重, 曹良才. 面向高通量的多通道复用数字全息成像技术[J]. 中国光学(中英文). doi: 10.37188/CO.2022-0070
HUANG Zheng-zhong, CAO Liang-cai. Multi-channel multiplexing digital holographic imaging for high throughput[J]. Chinese Optics. doi: 10.37188/CO.2022-0070
Citation: HUANG Zheng-zhong, CAO Liang-cai. Multi-channel multiplexing digital holographic imaging for high throughput[J]. Chinese Optics. doi: 10.37188/CO.2022-0070

面向高通量的多通道复用数字全息成像技术

doi: 10.37188/CO.2022-0070
基金项目: 国家自然科学基金(No. 82170677)
详细信息
    作者简介:

    黄郑重(1997—),男,湖南岳阳人,博士研究生,2019年于华南师范大学获得学士学位,现为清华大学精密仪器系博士研究生,主要从事非标记定量干涉成像研究。E-mail:hzz19@mails.tsinghua.edu.cn

    曹良才(1977—),男,湖北公安人,博士,教授,博士生导师,2005年获得清华大学光学工程专业博士学位,现为清华大学精密仪器系教授,主要从事全息光学成像与显示方面的研究。E-mail:clc@tsinghua.edu.cn

  • 中图分类号: TP394.1;TH691.9

Multi-channel multiplexing digital holographic imaging for high throughput

Funds: Supported by National Natural Science Foundation of China (No. 82170677)
More Information
  • 摘要: 光学成像已成为跨尺度表征生物系统信息的主要方法之一,近年来生物样本的快速、无损且全面表征对成像系统的可解析量提出了高的要求。数字全息通过干涉成像方式,可准确重构光波前的振幅和相位信息,具有快速、无损、三维成像等优势,在数字病理诊断、细胞无标记观察和实时监测等方面得到了广泛的研究和应用。本文首先介绍了实现高通量成像的主要方式,并分析数字全息的优势及空间带宽变化关系,展示了基于希尔伯特变换的面向高通量多通道复用数字全息技术的理论框架,并介绍了基于该理论框架设计的拓展视场双通道复用数字全息显微成像系统。该系统在不牺牲空间和时间分辨率的情况下,可实现超越传统离轴全息显微镜8倍的空间带宽积。所介绍的数字全息复用技术可充分利用单幅强度图像的冗余空间带宽,可用于高通量多通道复用数字全息成像。

     

  • 图 1  成像空间带宽积拓展。(a)空间域拓展示意,拓展光学系统的空间域成像范围;(b)基于相机阵列的多尺度光学成像系统[36-37];(c)基于相机阵列的大视场生物显微成像系统[38];(d)频域拓展示意,拓展现有光学系统的频率通带范围;(e)基于多角度照明的傅里叶域叠层显微成像系统[40];(f)基于多角度照明的无透镜片上成像系统[41]

    Figure 1.  The expansion of the imaging SBP, (a) The schematic diagram of the expansion in spatial domain to expand the spatial imaging range; (b) The multi-scale optical imaging system based on the camera array[36-37]; (c) The large field of view biological microscopic system based on the camera array[38]; (d) The schematic diagram of frequency domain expansion, expanding the frequency passband range of existing optical systems; (e) Fourier ptychographic microscopy system based on multi-angle illumination[40]; (f) Lensless on-chip imaging systems based on multi-angle illumination[41].

    图 2  传统离轴数字全息示意图,FT为傅里叶变换(Fourier transform)的简称。

    Figure 2.  Schematic diagram of conventional off-axis digital holography. FT indicates the Fourier transform.

    图 3  数字全息复用技术及应用示意图。(a)双通道离轴全息复用示意;(b)基于复用技术拓展成像视场[47];(c)基于复用技术拓展成像分辨率[49];(d)基于复用技术拓展成像深度[50]

    Figure 3.  Schematic diagram of digital holographic multiplexing and application. (a) Schematic diagram of dual-channel off-axis holographic multiplexing; (b) Expanding imaging field of view based on digital holographic multiplexing[47]; (c) Expanding imaging resolution based on digital holographic multiplexing[49]; (d) Expanding imaging depth of field based on digital holographic multiplexing[50].

    图 4  数值计算结果。(a)数字全息复用模型,以双通道为例;(b)−(c)2路原始物光相位分布;(d)2通道复用全息图的傅里叶频谱,物光谱与其他项完全分离;(e)−(f)对应(d)的2路重建物光相位分布;(g)2通道复用全息图的傅里叶频谱,物光谱与其他项重叠;(h)−(i)对应(g)2路重建物光相位分布;(j)8通道复用全息图的傅里叶频谱, 4路为物光1,其他4路为物光2,物光谱与其他项重叠;(k)−(l)对应(j)的其中2路重建物光相位分布;

    Figure 4.  Numerical calculation results. (a) Digital holographic multiplexing model, taking two channels as an example; (b)−(c) Phase distribution of original object; (d) Fourier spectrum of the 2-channel multiplexed hologram, and the spectra are completely separated from other terms; (e)−(f) The reconstructed phases from (d); (g) Fourier spectrum of the 2-channel multiplexed hologram, the object spectra are overlapped with other terms; (h)−(i) The reconstructed phases from (g); (j) Fourier spectrum of 8-channel multiplexed hologram, 4 channels are the object 1, the other 4 channels are the object 2, and the object spectra are overlapped with other terms, (k)−(l) Two of the reconstructed phases from (j);

    图 5  数值计算结果。(a)相位重建MSE随采集位深变化的结果;(b)相位重建MSE随参考光振幅值变化的结果。

    Figure 5.  Numerical calculation results. (a) The MSE result of phase reconstruction as a function of acquisition bit depth; (b) The MSE result of phase reconstruction as a function of the amplitude value of reference wave.

    图 6  高空间带宽利用率数字全息显微镜光路示意图。(a)视场拓展数字全息显微系统;(b)光路复用示意图;(c)视场复用示意图[48]

    Figure 6.  Schematic diagram of the optical path of a digital holographic microscope with high spatial bandwidth utilization. (a) Extended field-of-view digital holographic microscope; (b) Schematic diagram of optical multiplexing setup; (c) Schematic diagram of field-of-view multiplexing[48].

    图 7  高空间带宽利用率数字全息显微镜重建图像[48]。(a)高通量复用全息图;(b)复用全息图的频谱;(c)高通量定量相位重建结果;(d)传统数字全息显微镜得到的全息图;(e)传统离轴全息频谱;(f)传统离轴全息重建结果。

    Figure 7.  Reconstruction from high spatial bandwidth utilization digital holographic microscope[48]. (a) Multiplexed hologram; (b) Spectrum of the multiplexed hologram; (c) High-throughput quantitative phase reconstruction from (a); (d) The hologram from conventional off-axis digital holographic microscope; (e) Spectrum of conventional off-axis hologram; (f) The reconstruction of conventional off-axis hologram in (d).

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