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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.

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Stray-light suppression with high-collection efficiency in laser light-scattering experiments.

K Deilamian, J D Gillaspy, D E Kelleher

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    |August 21, 2010
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    We developed an optical system for efficient fluorescent light collection from cylindrical sources. This system achieves high detection efficiency while rejecting incident laser light by over 12 orders of magnitude without filters.

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    Area of Science:

    • Optical Physics
    • Spectroscopy
    • Experimental Design

    Background:

    • Isotropic fluorescence collection is challenging in many light-scattering experiments.
    • Rejection of incident laser light often requires spectral filters, limiting experimental flexibility.

    Purpose of the Study:

    • To design and construct an optical system for efficient collection of fluorescent light.
    • To achieve high rejection of incident laser light without spectral filters.

    Main Methods:

    • Construction of a specialized optical system.
    • Characterization of light collection efficiency.
    • Measurement of incident laser light rejection.

    Main Results:

    • The system collects a large fraction of isotropically emitted fluorescent light.
    • An overall detection efficiency of 9% was maintained.
    • Incident laser light was rejected by more than 12 orders of magnitude along a specific axis.

    Conclusions:

    • The developed optical system is effective for experiments requiring high fluorescence collection efficiency.
    • It enables laser light rejection without spectral filters, broadening applicability in light-scattering studies.