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Related Concept Videos

Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

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Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
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Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...
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Updated: May 30, 2025

Single Plane Illumination Module and Micro-capillary Approach for a Wide-field Microscope
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All-reflective freeform microscope objective for ultra-broadband microscopy.

Aaron Bauer, Jannick P Rolland, Stephan Clark

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    Summary
    This summary is machine-generated.

    This study presents an all-reflective microscope objective lens that overcomes chromatic aberrations common in refractive lenses. This new design offers diffraction-limited imaging across an ultra-wide spectral range, enhancing microscopy capabilities.

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    Area of Science:

    • Optical Engineering
    • Microscopy Technology
    • Advanced Optics

    Background:

    • Refractive microscope objectives suffer from chromatic aberrations due to optical element dispersion, limiting their spectral range.
    • Achieving well-corrected imaging over broad spectral ranges with refractive lenses is challenging.
    • Reflective optics are inherently achromatic, enabling color-corrected imaging across ultra-wide spectral ranges.

    Purpose of the Study:

    • To explore the design of unobscured, high numerical aperture, all-reflective microscope objectives.
    • To utilize freeform optical elements to eliminate the need for a center obscuration.
    • To develop a reflective objective compatible with commercial microscope systems.

    Main Methods:

    • Exploration of the design space for all-reflective microscope objectives.
    • Application of freeform optical elements to remove central obscuration.
    • Detailed design process including specification determination, system optimization, and sensitivity analysis.

    Main Results:

    • An all-reflective freeform microscope objective lens was designed.
    • The objective achieves a numerical aperture of 0.65.
    • Diffraction-limited imaging performance was achieved, comparable to refractive systems.
    • The design is compatible with commercial microscope geometric constraints.

    Conclusions:

    • All-reflective objectives using freeform optics can overcome chromatic aberration limitations.
    • The developed objective provides high-performance, broad-spectral imaging without central obscuration.
    • This technology enhances microscopy for diverse imaging modalities.