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Related Concept Videos

Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
Super-resolution Fluorescence Microscopy01:37

Super-resolution Fluorescence Microscopy

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 developed.
Total Internal Reflection Fluorescence Microscopy01:05

Total Internal Reflection Fluorescence Microscopy

Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.

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Related Experiment Video

Updated: Jun 22, 2026

Video-rate Scanning Confocal Microscopy and Microendoscopy
14:10

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Published on: October 20, 2011

Confocal laser scanning fluorescence microscopy with a visible continuum source.

Gail McConnell

    Optics Express
    |June 2, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates confocal laser scanning fluorescence microscopy using a novel photonic crystal fiber excitation source. This technique efficiently generates specific wavelengths for imaging biological tissues.

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    Area of Science:

    • Biophotonics
    • Microscopy
    • Optical Engineering

    Background:

    • Confocal laser scanning fluorescence microscopy is a vital tool in biological research.
    • Traditional excitation sources can be limited in wavelength flexibility and efficiency.

    Purpose of the Study:

    • To demonstrate a photonic crystal fiber (PCF)-based excitation source for confocal laser scanning fluorescence microscopy.
    • To provide a flexible and efficient method for generating specific excitation wavelengths for biological imaging.

    Main Methods:

    • A 38 cm section of PCF was pumped using femtosecond pulses from a Ti:sapphire laser.
    • The generated visible continuum was selectively filtered to obtain desired excitation wavelengths.
    • The system was applied to fluorescently labeled biological tissue.

    Main Results:

    • Successful demonstration of PCF-based excitation for confocal microscopy.
    • Generation of a visible continuum with tunable peak excitation wavelengths.
    • Effective imaging of fluorescently labeled biological tissue was achieved.

    Conclusions:

    • Photonic crystal fiber offers a versatile and efficient excitation source for confocal laser scanning fluorescence microscopy.
    • This approach enables precise wavelength selection for advanced biological imaging applications.