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Related Concept Videos

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.
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,...

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Related Experiment Video

Updated: Jun 5, 2026

Conducting Multiple Imaging Modes with One Fluorescence Microscope
08:32

Conducting Multiple Imaging Modes with One Fluorescence Microscope

Published on: October 28, 2018

High-resolution fluorescence microscopy based on a cyclic sequential multiphoton process.

Keisuke Isobe, Akira Suda, Hiroshi Hashimoto

    Biomedical Optics Express
    |January 25, 2011
    PubMed
    Summary
    This summary is machine-generated.

    We developed a new high-resolution fluorescence microscopy technique using cyclic sequential multiphoton (CSM) excitation. This method achieves superior spatial resolution compared to traditional confocal microscopy by controlling fluorophore states.

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    Area of Science:

    • Optics and Photonics
    • Microscopy
    • Biophysics

    Background:

    • Conventional fluorescence microscopy faces limitations in achieving ultra-high spatial resolution.
    • Understanding and controlling fluorophore photophysics is crucial for advanced imaging techniques.

    Purpose of the Study:

    • To demonstrate a novel high-resolution fluorescence microscopy method based on cyclic sequential multiphoton (CSM) excitation.
    • To investigate the principles of CSM fluorescence emission and signal extraction.

    Main Methods:

    • Utilizing a cyclic sequential multiphoton (CSM) process involving pump and reverse light to induce transitions between fluorophore bright and dark states.
    • Temporally modulating reverse light intensity to selectively extract the CSM-generated fluorescence signal.
    • Analyzing the nonlinear proportionality of the demodulated fluorescence signal to excitation intensities.

    Main Results:

    • Successfully demonstrated high-resolution fluorescence microscopy using the CSM process.
    • Showcased that the extracted fluorescence signal is nonlinearly proportional to excitation intensities.
    • Achieved higher spatial resolution compared to conventional confocal microscopy.

    Conclusions:

    • The CSM process offers a viable pathway for achieving enhanced spatial resolution in fluorescence microscopy.
    • Temporal modulation of reverse light is an effective strategy for signal extraction in CSM-based imaging.
    • This technique holds potential for advanced biological and materials science imaging applications.