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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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Electrocyclic reactions, cycloadditions, and sigmatropic rearrangements are concerted pericyclic reactions that proceed via a cyclic transition state. These reactions are stereospecific and regioselective. The stereochemistry of the products depends on the symmetry characteristics of the interacting orbitals and the reaction conditions. Accordingly, pericyclic reactions are classified as either symmetry-allowed or symmetry-forbidden. Woodward and Hoffmann presented the selection criteria for...
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Related Experiment Video

Updated: Jan 11, 2026

Microfabrication of Implantable Optics Integrated in a Microstructured Imaging Window for Advanced In Vivo Imaging
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Iterative refinement of arbitrary micro-optical surfaces.

Meagan Plummer, Stephen Taylor, Matthew Marshall

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    Summary
    This summary is machine-generated.

    We developed an adaptive optical refinement method for ultra-precise micro-milling of arbitrary surfaces. This iterative process significantly reduces surface errors, enabling advanced optical component fabrication with reduced preparation time.

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    Area of Science:

    • Optical Engineering
    • Materials Science
    • Precision Manufacturing

    Background:

    • Traditional micro-milling methods require extensive sample preparation and lack refinement capabilities.
    • Existing techniques struggle with achieving ultra-precise finishes on arbitrary optical surfaces.

    Purpose of the Study:

    • To introduce an adaptive optical refinement method for ultra-precise micro-milling.
    • To overcome limitations of previous methods regarding sample preparation time and refinement.
    • To demonstrate the fabrication of complex optical surfaces and components.

    Main Methods:

    • An iterative refinement milling process was employed.
    • The method adaptively reduces surface error through repeated iterations.
    • Application to various materials and arbitrary surface geometries was demonstrated.

    Main Results:

    • Achieved ultra-precise micro-milling of arbitrary surfaces with reduced error.
    • Successfully produced spherical mirrors for micro Fabry-Perot cavities with low surface roughness.
    • Demonstrated fabrication of diverse optical geometries on fiber tips and optical flats.

    Conclusions:

    • The adaptive optical refinement method offers a significant advancement in precision micro-milling.
    • This technique enables efficient fabrication of high-quality optical components and custom surfaces.
    • The method shows potential for constructing gradient index (GRIN) lenses and other advanced optical elements.