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Related Concept Videos

Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

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The early pioneers of microscopy opened a window into the invisible world of microorganisms. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes that leveraged nonvisible light, such as fluorescence microscopy that uses an ultraviolet light source and electron microscopy that uses short-wavelength electron beams. These advances significantly improved magnification, image resolution, and contrast. By comparison, the...
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Confocal Fluorescence Microscopy01:16

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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: Jan 4, 2026

Real-Time, Two-Color Stimulated Raman Scattering Imaging of Mouse Brain for Tissue Diagnosis
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Twin-beam sub-shot-noise raster-scanning microscope.

J Sabines-Chesterking, A R McMillan, P A Moreau

    Optics Express
    |November 6, 2019
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new quantum microscope that achieves higher precision in imaging photosensitive samples. By using the quantized nature of light, it surpasses classical limits for better observation without increased optical power.

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    Area of Science:

    • Quantum optics
    • Microscopy
    • Photonics

    Background:

    • Classical microscopes are limited by shot-noise, affecting precision in imaging delicate samples.
    • Improving signal-to-noise ratio often requires higher optical power or sacrificing resolution.

    Purpose of the Study:

    • To demonstrate a sub-shot-noise scanning optical transmittance microscope.
    • To enhance precision in transmittance estimation beyond classical limits.

    Main Methods:

    • Utilizing correlated twin-beams generated via parametric down-conversion.
    • Implementing a hybrid detection scheme with photon-counting feed-forward and a CCD camera.

    Main Results:

    • Achieved a sub-shot-noise level of precision in transmittance estimation.
    • Demonstrated a 1.76(9) improvement factor in precision per probe photon compared to classical methods.
    • Maintained micron-scale resolution without increasing optical power.

    Conclusions:

    • The quantum microscope enables higher precision imaging of photosensitive samples.
    • This technology offers a pathway to observe delicate samples with improved sensitivity and signal-to-noise ratio.