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High-resolution Fiber-optic Microendoscopy for in situ Cellular Imaging
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High-quality manipulable fiber-microsphere for super-resolution microscopy.

Tony Hajj, Sebastien Marbach, Pierre Pfeiffer

    Optics Letters
    |May 1, 2023
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a novel fiber microsphere (fMS) for microscopy, overcoming limitations of traditional microsphere (MS)-assisted imaging. The fMS offers superior resolution and imaging performance with enhanced sample scanning capabilities.

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    Area of Science:

    • Optics and Photonics
    • Microscopy Techniques
    • Materials Science

    Background:

    • Microsphere (MS)-assisted microscopy enhances resolution but suffers from limited field of view, surface defects, low contrast, and poor manipulability.
    • Existing MS technologies present challenges in practical application and sample interaction.
    • There is a need for improved MS designs that address these limitations for advanced imaging.

    Purpose of the Study:

    • To introduce a new type of microsphere, the fiber microsphere (fMS), fabricated at the tip of an optical fiber.
    • To demonstrate the advantages of fMS in microscopy, focusing on overcoming the limitations of conventional MS.
    • To present the fabrication process and optical system utilized for fMS imaging.

    Main Methods:

    • Fabrication of fMS by melting and stretching single-mode or coreless optical fibers.
    • Integration of fMS with an optical fiber for enhanced manipulability and sample scanning.
    • Comparative optical system design for evaluating fMS against traditional soda-lime MS.

    Main Results:

    • The fMS exhibits high homogeneity due to its fiber-based fabrication.
    • The fMS offers a smaller sphere diameter relative to the fiber, improving optical coupling.
    • Measurements confirm the fMS provides superior resolving power and imaging performance compared to soda-lime MS.

    Conclusions:

    • The fiber microsphere (fMS) represents a significant advancement in MS-assisted microscopy.
    • The fMS design effectively addresses key limitations of conventional MS, including handling and imaging quality.
    • This innovation facilitates simpler sample scanning and improved microscopy resolution.