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Phase Contrast and Differential Interference Contrast Microscopy01:26

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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Updated: May 30, 2025

A Time-lapse, Label-free, Quantitative Phase Imaging Study of Dormant and Active Human Cancer Cells
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Quantitative phase imaging: introduction.

Chenfei Hu, Seung Ah Lee, Yang Liu

    Journal of the Optical Society of America. A, Optics, Image Science, and Vision
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    Summary
    This summary is machine-generated.

    Quantitative phase imaging (QPI) offers precise phase delay measurements, advancing biomedical and material science applications. This special issue honors pioneer Prof. Gabi Popescu by showcasing QPI

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    Area of Science:

    • Optics and Photonics
    • Biomedical Imaging
    • Materials Science

    Background:

    • Quantitative Phase Imaging (QPI) has advanced significantly due to digital holography and computational imaging.
    • QPI provides high-precision phase delay retrieval, crucial for various scientific disciplines.
    • The field has experienced substantial growth over the last two decades.

    Purpose of the Study:

    • To commemorate the legacy of Prof. Gabriel "Gabi" Popescu, a pioneer in QPI and label-free biological imaging.
    • To present a collection of articles highlighting advancements in QPI methodologies.
    • To showcase diverse applications of QPI in biomedicine and material metrology.

    Main Methods:

    • Leveraging digital holography and computational imaging techniques for enhanced phase delay measurements.
    • Exploring various QPI methodologies for biological and material analysis.
    • Utilizing label-free imaging approaches for live cell monitoring and material characterization.

    Main Results:

    • QPI enables precise phase delay measurements, driving innovation in scientific research.
    • Demonstrated applications include live cell monitoring, material structure profiling, and defect inspection.
    • The collected articles represent the cutting edge of QPI research and development.

    Conclusions:

    • Quantitative Phase Imaging is a powerful tool with broad applicability across scientific fields.
    • The ongoing advancements in QPI continue to expand its potential in research and industry.
    • This special issue serves as a tribute to Prof. Popescu's foundational contributions to the field.