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Deposition Sciences Inc. - Difficult Coatings - LB - 8/23
Photonics Dictionary

reflection grating

A reflection grating is an optical component that consists of a series of closely spaced, parallel reflecting surfaces or grooves. These grooves are typically ruled or etched onto a flat substrate or a concave surface. The purpose of a reflection grating is to disperse incident light into its component wavelengths through the process of diffraction.

When light impinges on a reflection grating, the closely spaced grooves cause the incident light to be diffracted in different directions. The angles at which the diffracted light occurs depend on the wavelength of the incoming light and the spacing of the grooves. This dispersion property allows reflection gratings to be used in spectroscopy and other optical applications where separating light into its constituent colors or wavelengths is necessary.

Reflection gratings find applications in various fields, including spectrometry, astronomy, and telecommunications. They are often used in instruments such as spectrometers to analyze the spectral content of light by separating it into its individual components. The efficiency and performance of reflection gratings depend on factors such as groove density, blaze angle, and the quality of the ruling or etching process.
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