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Updated: Feb 18, 2026

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fastSIM: a practical implementation of fast structured illumination microscopy.

Hui-Wen Lu-Walther1, Martin Kielhorn, Ronny Förster

  • 1Leibniz Institute of Photonic Technology, Jena, Germany.

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|November 18, 2017
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Summary
This summary is machine-generated.

This study presents a faster structured illumination microscopy (SIM) technique for real-time 3D imaging of living cells. The enhanced speed enables new applications for super-resolution microscopy.

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Area of Science:

  • Biophysics
  • Microscopy
  • Cell Biology

Background:

  • Structured illumination microscopy (SIM) is a well-established super-resolution technique.
  • Current limitations in acquisition speed restrict its application in dynamic biological processes.

Purpose of the Study:

  • To significantly improve the acquisition speed of SIM for real-time 3D imaging of living cells.
  • To expand the application scope of SIM in biological research.

Main Methods:

  • Implemented a two-beam SIM fluorescence microscope.
  • Utilized a programmable spatial light modulator (ferroelectric LCOS) for precise pattern control.
  • Employed a passive Fourier filter and segmented polarizer for high-contrast illumination.
  • Leveraged the free-running mode of a modern sCMOS camera for rapid data acquisition.

Main Results:

  • Achieved a maximum raw data acquisition rate of 162 frames per second (fps).
  • Demonstrated a lateral resolution of approximately 100 nm.
  • Operated without mechanically moving components for enhanced stability and speed.
  • Enabled real-time imaging over a region of interest of 16.5 x 16.5 µm².

Conclusions:

  • The developed high-speed SIM method overcomes previous temporal limitations.
  • This advancement facilitates new possibilities for observing dynamic cellular processes in 3D.
  • The system offers a robust platform for advanced live-cell super-resolution imaging.