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Ptychographic phase microscope based on high-speed modulation on the illumination beam.

Yudong Yao1, Suhas P Veetil2, Cheng Liu3

  • 1Shanghai Institute of Optics and Fine Mechanics, Key Laboratory of High Power Laser and Physics, Chinese Academy of Sciences, Shanghai, ChinabNational Laboratory on High Power Laser and Physics, Chinese Academy of Sciences, Shanghai, ChinacUniversity of Chinese Academy of Sciences, Beijing, China.

Journal of Biomedical Optics
|March 11, 2017
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Summary

A new ptychography-based phase microscope uses a spatial light modulator (SLM) for advanced imaging. This technique accurately reconstructs sample details, offering advantages for biological sample analysis.

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Area of Science:

  • Optics and Photonics
  • Microscopy Techniques
  • Biomedical Imaging

Background:

  • Quantitative phase imaging is crucial for analyzing transparent biological samples.
  • Traditional phase microscopes often face limitations like complex structures and sensitivity to noise.
  • Developing advanced microscopy for fragile biological specimens is an ongoing challenge.

Purpose of the Study:

  • To develop a novel ptychography-based phase microscope.
  • To integrate a spatial light modulator (SLM) into a commercial wide-field light microscope.
  • To achieve accurate quantitative phase imaging with improved performance and simplicity.

Main Methods:

  • Integration of a spatial light modulator (SLM) into a wide-field light microscope.
  • Utilizing ptychography principles with dynamic sample illumination patterns.
  • Reconstruction of sample transmission function (modulus and phase) from diffraction intensities.

Main Results:

  • Accurate reconstruction of both modulus and phase of the sample's transmission function.
  • Demonstrated advantages over other phase microscopes: simple structure, high immunity to coherent noise, low optical quality requirements.
  • Effective removal of illumination beam defects from reconstructed images.
  • Fast data acquisition capability.

Conclusions:

  • The developed ptychography-based phase microscope offers a simple, robust, and accurate method for quantitative phase imaging.
  • Its capabilities are well-suited for imaging dynamic or fragile biological samples.
  • This advancement in microscopy facilitates high-accuracy imaging in life sciences and beyond.