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Related Experiment Videos

Interference reflection microscopy. A quantitative theory for image interpretation and its application to

D Gingell, I Todd

    Biophysical Journal
    |June 1, 1979
    PubMed
    Summary

    This study presents a quantitative theory for microscope interferometry, crucial for accurately measuring cell-glass separation. High illuminating apertures minimize cytoplasmic thickness effects but necessitate advanced theories to prevent significant errors.

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    Area of Science:

    • Microscopy
    • Optical Physics
    • Cell Biology

    Background:

    • Microscope interferometry is vital for cell-substratum separation measurements.
    • Accurate interpretation requires understanding light-specimen interactions.
    • Existing theories may not fully account for high numerical aperture illumination.

    Purpose of the Study:

    • To develop a quantitative theory for microscope interferometry under wide-angle illumination.
    • To assess the impact of cytoplasmic thickness on cell-glass separation measurements.
    • To provide a theoretical framework for high numerical aperture microscopy.

    Main Methods:

    • Developed a quantitative theory for microscope interferometry.
    • Simulated results using a cone of monochromatic light (0-100 degrees).

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  • Validated computed results with photometric measurements of fringe irradiance.

    • Main Results:

    • Computed results align with experimental photometric measurements for a water wedge.
    • Cytoplasmic thickness significantly influences interference images, especially at low apertures.
    • High illuminating apertures minimize cytoplasmic influence but require finite aperture theory.

    Conclusions:

    • A quantitative theory for microscope interferometry is essential for accurate cell-glass separation.
    • Finite illuminating aperture theory is critical at high numerical apertures.
    • Neglecting this can lead to over 100% error in cell-glass separation estimates.