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Continuous optical zoom microscopy imaging system based on liquid lenses.

Zhao Jiang, Di Wang, Yi Zheng

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    |July 16, 2021
    PubMed
    Summary

    This study introduces a novel continuous optical zoom microscopy system using liquid lenses, enabling real-time magnification changes without mechanical parts. This liquid lens microscope offers stable performance for dynamic sample observation in biochemical and pathological analysis.

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    Area of Science:

    • Optical microscopy
    • Biomedical engineering
    • Materials science

    Background:

    • Traditional microscopes offer discrete magnification, requiring manual objective lens changes.
    • Continuous magnification adjustment is crucial for observing dynamic biological and pathological samples.

    Purpose of the Study:

    • To propose and demonstrate a continuous optical zoom microscopy imaging system utilizing liquid lenses.
    • To overcome the limitations of discrete magnification in traditional microscopes.

    Main Methods:

    • The system integrates an adaptive zoom microscope with electrowetting liquid lenses and glass lenses.
    • A liquid lens driving board controls voltage applied to liquid lenses, modulating focal length for continuous zooming.
    • The system includes a microscope bracket, adjustable stage, and light source.

    Main Results:

    • Achieved continuous magnification from approximately 9.6× to 22.2× with a response time of ~50ms.
    • Enabled axial depth scanning of ~1000µm without mechanical movement.
    • Demonstrated stable performance and high consistency during zooming.

    Conclusions:

    • The proposed liquid lens microscope offers significant advantages over traditional systems for observing dynamic samples.
    • The system's real-time continuous zooming and depth scanning capabilities support its commercialization for biochemical and pathological analysis.