Transmission grating

An optical (also diffraction) grating is an optical element with a regular pattern that divides (bends) light into several beams propagating in different directions. The directions of light propagation depend on the spacing of the grating elements and the wavelength of the light, so the optical grating can serve as a dispersive element to decompose light into wavelengths.

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Blazed grating

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This article discusses the effects of spherical aberration on image quality and explains the use of water immersion objectives for critical work.

Diffraction grating formula

Common pressed CDs and DVDs are an everyday example of a diffraction grating and can be used to demonstrate an optical grating, for example by reflecting sunlight on a white wall.

Diffraction gratings are often used in instruments such as monochromators, spectrometers, lasers, and many other optical instruments.

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Holographic grating

Echelle grating

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Diffraction grating

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An example of diffraction on a grating in nature can be the iridescent colors of peacock feathers, mother of pearl, butterfly wings, beetle shells, etc. The reason is the very fine structures that break up the light into colors on their regular pattern.