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Related Concept Videos

¹H NMR: Complex Splitting01:13

¹H NMR: Complex Splitting

A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.

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Split Retina as an Improved Flatmount Preparation for Studying Inner Nuclear Layer Neurons in Vertebrate Retina
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Stress-induced focal splitting.

Alexis K Spilman, Thomas G Brown

    Optics Express
    |June 24, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Circularly polarized light interacting with stressed materials creates distinct polarization patterns. This phenomenon causes an axial focus splitting in imaging systems, with potential applications in optical imaging.

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    Area of Science:

    • Optics
    • Materials Science
    • Polarization Optics

    Background:

    • Circularly polarized light exhibits unique properties.
    • Birefringence in stressed materials can alter light polarization.
    • Pupil elements can modify optical system behavior.

    Purpose of the Study:

    • To analyze the axial focus splitting induced by trigonal birefringence in an imaging system.
    • To experimentally validate the phenomenon of focus splitting.
    • To explore potential applications in optical imaging.

    Main Methods:

    • Theoretical analysis of light propagation through a birefringent pupil.
    • Experimental setup using a stressed window in an imaging system.
    • Characterization of the resulting focal patterns under circularly polarized illumination.

    Main Results:

    • Trigonal birefringence patterns generate concentric rings of alternating circular polarization.
    • A stressed pupil window induces an axial splitting of the optical focus.
    • Experimental results confirm the predicted focus splitting behavior.

    Conclusions:

    • The axial focus splitting is a direct consequence of trigonal birefringence.
    • This effect offers new possibilities for optical imaging techniques.
    • Further research can explore advanced applications in microscopy and sensing.