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Related Concept Videos

Elastic Strain Energy for Shearing Stresses01:20

Elastic Strain Energy for Shearing Stresses

As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...

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Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System
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Toroidal grating obtained on an elastic substrate.

M C Huber, E Jannitti, G Lemaître

    Applied Optics
    |March 25, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Elastic toroidal gratings offer tunable wavelength selection for spectrographs. Adjusting forces on the grating substrate allows for near-stigmatic performance, enabling precise spectral analysis.

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    Area of Science:

    • Optics and Spectroscopy
    • Materials Science

    Background:

    • Toroidal gratings are crucial optical components in spectrographs.
    • Achieving stigmatic performance in toroidal gratings is challenging.

    Purpose of the Study:

    • To investigate the performance of elastically deformed toroidal gratings.
    • To demonstrate tunable wavelength selection for spectrographs.

    Main Methods:

    • Elastic deformation of a spherical grating into a toroidal shape.
    • Ray tracing analysis to predict grating performance.
    • Experimental adjustment of forces on the grating substrate.

    Main Results:

    • Performance matches ideal toroidal surface ray tracing.
    • Wavelength range for near-stigmatic performance is selectable.
    • Elastic deformation enables tunable spectral analysis.

    Conclusions:

    • Elastically deformed toroidal gratings provide tunable spectral performance.
    • Adjustable forces allow optimization of spectrograph characteristics.
    • Replication of elastically deformed blanks is feasible.