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Near Simultaneous Laser Scanning Confocal and Atomic Force Microscopy Conpokal on Live Cells
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Versatile high-speed confocal microscopy using a single laser beam.

Benedikt B Straub1, David C Lah1, Henrik Schmidt1

  • 1Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany.

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|April 9, 2020
PubMed
Summary
This summary is machine-generated.

We developed a high-speed laser scanning confocal microscope with a re-scan configuration for faster imaging. This system reduces phototoxicity and integrates with astigmatism particle tracking velocimetry (APTV) for 3D dynamic measurements.

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Area of Science:

  • Optical microscopy
  • Biophysics
  • Advanced imaging techniques

Background:

  • Standard confocal microscopes face trade-offs between frame rate and imaging quality.
  • Single-beam systems offer high quality but low speed, while multi-beam systems achieve high speed at the cost of crosstalk.

Purpose of the Study:

  • To present a novel flexible, high-speed laser scanning confocal microscope.
  • To enhance the system with an astigmatism particle tracking velocimetry (APTV) device for 3D dynamic measurements.
  • To achieve high imaging quality independent of frame rate.

Main Methods:

  • Implementation of a re-scan configuration with a second 2D scan unit projecting the image onto a 2D CCD-sensor.
  • Utilizing a single laser beam to eliminate crosstalk and maintain imaging quality.
  • Integration of an astigmatism particle tracking velocimetry (APTV) device for simultaneous 3D dynamics measurement.

Main Results:

  • Achieved high frame rates exceeding video rate, up to a line rate of 32 kHz.
  • Maintained high lateral resolution (0.235 µm) independent of frame rate.
  • Reduced laser dwell time (122 ns) to minimize phototoxicity and photobleaching.

Conclusions:

  • The new confocal microscope design offers flexibility and high performance for advanced imaging.
  • The integration with APTV enables synchronized high-resolution structural and 3D dynamic measurements.
  • This technology opens new possibilities for studying dynamic processes in biological and material sciences.