An Echelle grating is a type of diffraction grating used in spectroscopy to disperse light into its component wavelengths. It is characterized by having a large number of closely spaced grooves (or lines) that are typically arranged at an angle to maximize the diffraction efficiency. The key features of an Echelle grating include: 1. **High Dispersion**: Echelle gratings are designed to produce a high degree of angular dispersion due to their shallow groove angle and high groove density.
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