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Low cost label-free live cell imaging for biological samples

机译:用于生物样品的低成本无标签活细胞成像

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This paper reports the progress to develop a practical phase measuring microscope offering new capabilities in terms of phase measurement accuracy and quantification of cellxell interactions over the longer term. A novel, low cost phase interference microscope for imaging live cells (label-free) is described. The method combines the Zernike phase contrast approach with a dual mirror design to enable phase modulation between the scattered and un-scattered optical fields. Two designs are proposed and demonstrated, one of which retains the common path nature of Zernike's original microscopy concept. In both setups the phase shift is simple to control via a piezoelectric driven mirror in the back focal plane of the imaging system. The approach is significantly cheaper to implement than those based on spatial light modulators (SLM) at approximately 20% of the cost. A quantitative assessment of the performance of a set of phase shifting algorithms is also presented, specifically with regard to broad bandwidth illumination in phase contrast microscopy. The simulation results show that the phase measurement accuracy is strongly dependent on the algorithm selected and the optical path difference in the sample.
机译:本文报道了开发实用的相位测量显微镜的进展,该显微镜在长期的相位测量精度和定量细胞相互作用方面提供了新的功能。描述了一种新颖的,低成本的相位干涉显微镜,用于对活细胞成像(无标记)。该方法将Zernike相位对比方法与双镜设计相结合,以实现散射和非散射光场之间的相位调制。提出并演示了两种设计,其中一种保留了Zernike原始显微镜概念的通用路径性质。在这两种设置中,都可以通过成像系统后焦平面中的压电驱动镜简单地控制相移。与基于空间光调制器(SLM)的方法相比,该方法的实施成本要便宜得多,大约占成本的20%。还提出了一组相移算法性能的定量评估,特别是在相衬显微镜中对宽带宽照明的评估。仿真结果表明,相位测量精度很大程度上取决于所选择的算法和样本中的光程差。

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