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Related Concept Videos

Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

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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Related Experiment Video

Updated: Jun 15, 2026

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
10:16

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

Published on: February 8, 2014

Image plane holograms for holographic microscopy.

M E Cox, K J Vahala

    Applied Optics
    |March 4, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Reducing spatial coherence in holographic microscopy significantly reduces image speckle. Careful parameter selection maintains resolution for detailed microscopic imaging of samples like cells and hairs.

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    Last Updated: Jun 15, 2026

    Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
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    Published on: February 8, 2014

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    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
    09:04

    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display

    Published on: January 14, 2020

    Area of Science:

    • Optics and Photonics
    • Microscopy Techniques

    Background:

    • Holographic microscopy offers high-resolution imaging capabilities.
    • Image speckle is a common artifact that degrades image quality in holographic reconstructions.

    Purpose of the Study:

    • To investigate the impact of spatial coherence on speckle reduction in holographic microscopy.
    • To determine optimal recording parameters for high-resolution holographic imaging.

    Main Methods:

    • Utilized image holograms within a holographic microscopy setup.
    • Manipulated the degree of spatial coherence of the reconstructing light source.
    • Analyzed reconstructed real image fields for speckle characteristics.
    • Evaluated recording parameters for resolution preservation.

    Main Results:

    • A reduction in the spatial coherence of the reconstructing light source led to decreased speckle in the reconstructed image.
    • Specific recording parameters were identified as crucial for maintaining necessary resolution.
    • Successful imaging of test targets, blood cells, and human hairs was demonstrated.

    Conclusions:

    • Controlling spatial coherence is an effective strategy for mitigating speckle in holographic microscopy.
    • Optimized recording parameters are essential for achieving high-resolution microscopic analysis using holography.