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Related Concept Videos

Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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Published on: December 30, 2025

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High-speed multi-wavelength Fresnel diffraction imaging.

Daniel W E Noom, Dirk E Boonzajer Flaes, Elias Labordus

    Optics Express
    |January 22, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a compact, lensless microscope capable of high-speed, phase contrast imaging of moving specimens. It enables post-capture focal scanning, offering advanced capabilities for biological and material science applications.

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    Area of Science:

    • Optics and Photonics
    • Microscopy
    • Biophysics

    Background:

    • Traditional microscopy often struggles with capturing dynamic processes in real-time.
    • Phase contrast imaging is crucial for visualizing transparent biological samples.
    • Lens-based microscopes can be bulky and have fixed focal planes.

    Purpose of the Study:

    • To develop a compact, lensless microscope for video-rate phase contrast imaging.
    • To enable numerical scanning of focal distance after image acquisition.
    • To demonstrate the system's capability for high-speed imaging of dynamic biological and material samples.

    Main Methods:

    • Utilized a single-mode fiber for illumination and an RGB detector.
    • Recorded simultaneous diffraction patterns at three wavelengths.
    • Employed computational reconstruction algorithms for phase and amplitude retrieval.

    Main Results:

    • Achieved video-rate phase contrast imaging of moving objects.
    • Successfully performed numerical scanning of the focal distance post-recording.
    • Demonstrated high-speed imaging of a moving test target, beads in a flow cell, and Caenorhabditis elegans.

    Conclusions:

    • The developed lensless microscope offers a compact and versatile platform for dynamic imaging.
    • The technique allows for flexible post-acquisition focusing, enhancing usability.
    • This method provides a powerful tool for studying live biological processes and material dynamics at high speeds.