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Updated: Feb 9, 2026
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Implementation of Interference Reflection Microscopy for Label-free, High-speed Imaging of Microtubules
Published on: August 8, 2019
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LED-based interference-reflection microscopy combined with optical tweezers for quantitative three-dimensional
Optics Express
|June 8, 2018
Summary
We developed a new 3D microscopy method combining optical tweezers with interference-reflection microscopy (IRM) and total-internal-reflection-fluorescence (TIRF). This technique allows high-contrast imaging and 3D profiling of single microtubules.
Area of Science:
- Biophysics
- Microscopy
- Cell Biology
Background:
- Optical tweezers are crucial for single-molecule force spectroscopy.
- Combining optical tweezers with microscopy can enhance measurements.
- Certain microscopy techniques may interfere with optical tweezer measurements.
Purpose of the Study:
- To combine optical tweezers with total-internal-reflection-fluorescence (TIRF) and interference-reflection microscopy (IRM).
- To develop a high-contrast imaging method for single microtubules.
- To achieve 3D profiling of biological samples using microscopy.
Main Methods:
- Utilized optical tweezers for force spectroscopy.
- Integrated TIRF microscopy for fluorescence imaging.
- Employed LED-based IRM for high-contrast imaging.
- Converted IRM interference patterns to 3D profiles.
Main Results:
- Single microtubules were imaged with high contrast using LED-based IRM.
- The 3D profile of a bent microtubule was successfully reconstructed.
- The 3D profile was calibrated against optical tweezers and the TIRF evanescent field.
Conclusions:
- LED-based IRM is a powerful tool for high-contrast 3D microscopy.
- The combined optical tweezers-TIRF-IRM system enables precise 3D imaging and profiling.
- This integrated approach advances single-molecule force spectroscopy and biological imaging.
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