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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Atomic Force Microscopy01:08

Atomic Force Microscopy

Atomic force microscopy (AFM) is a type of scanning probe microscopy that can analyze topographic details of various specimens like ceramics, glass, polymers, and biological samples. AFM offers over 1000 times more resolution than the optical imaging system. Images generated from AFM are three-dimensional surface profiles, offering an advantage over the flat, two-dimensional images from other imaging techniques.
The AFM Probe
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Overview of Microscopy Techniques01:22

Overview of Microscopy Techniques

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...
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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Related Experiment Video

Updated: Jun 12, 2026

Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope
14:09

Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope

Published on: April 7, 2014

Angstrom resolution optical profilometry for microscopic objects.

F Laeri, T C Strand

    Applied Optics
    |May 22, 2010
    PubMed
    Summary
    This summary is machine-generated.

    A new instrument combines interference contrast microscopy with heterodyne detection and confocal scanning for high-resolution surface imaging. It achieves nanometer-scale step height resolution, enabling detailed surface profilometry.

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    Area of Science:

    • Optical microscopy
    • Surface science
    • Metrology

    Background:

    • Accurate surface characterization is crucial in various scientific and industrial fields.
    • Existing microscopy techniques have limitations in achieving both high phase and lateral resolution.
    • Interference contrast microscopy offers phase information but can be limited in lateral resolution.

    Purpose of the Study:

    • To develop and characterize a novel instrument for high-resolution surface profilometry.
    • To integrate heterodyne detection and confocal scanning with interference contrast microscopy.
    • To achieve superior phase and lateral resolution for detailed surface analysis.

    Main Methods:

    • Modification of a commercial microscope body with a coherent (heterodyne) detector.
    • Incorporation of a confocal laser scanning system.
    • Utilizing interference contrast optics for surface imaging.

    Main Results:

    • The instrument records amplitude and phase of reflected light with phase resolution better than lambda/3000.
    • Lateral resolution comparable to confocal scanning microscopes was achieved.
    • Two-dimensional surface images of amplitude, slope, and profile were obtained.
    • Step height resolution of 0.5-2 A was demonstrated.

    Conclusions:

    • The developed instrument offers unprecedented resolution for surface profilometry.
    • The combination of techniques provides a powerful tool for nanoscale surface characterization.
    • The instrument's capabilities are well-suited for detailed surface analysis and metrology.