Localizing and Characterizing Colloidal Particles Scattering Using Lens-free Holographic Microscopy

Xia Hua; Cheng Yang; Ye Huang; Feng Yan; Xun Cao

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Localizing and Characterizing Colloidal Particles Scattering Using Lens-free Holographic Microscopy

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Lens-free holographic microscopy could achieve both improved resolution and field of view (FOV),which has huge potential applications in biomedicine,fluid mechanics and soft matter physics.Unfortunately,due to the limited sensor pixel size,target objects could not be located to a satisfactory level.Recent studies have shown that electromagnetic scattering can be fitted to digital holograms to obtain the 3D positions of isolated colloidal spheres with nanometer precision and millisecond temporal resolution.Here,we describe a lens-free holographic imaging technique that fits multi-sphere superposition scattering to digital holograms to obtain in situ particle position and model parameters:size and refractive index of colloidal spheres.We show that the proposed method can be utilized to analyze the location and character of colloidal particles under large FOV with high density.

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《中国物理快报：英文版》 |2019年第1期|28-31|共4页
作者
Xia Hua; Cheng Yang; Ye Huang; Feng Yan; Xun Cao;
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School of Electronic Science and Engineering, Nanjing University, Nanjing 210093;

School of Electronic Science and Engineering, Nanjing University, Nanjing 210093;

School of Electronic Science and Engineering, Nanjing University, Nanjing 210093;

School of Electronic Science and Engineering, Nanjing University, Nanjing 210093;

School of Electronic Science and Engineering, Nanjing University, Nanjing 210093;

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Localizing and Characterizing Colloidal Particles Scattering Using Lens-free Holographic Microscopy

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