diffraction grating


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dif·frac·tion grat·ing

(di-frak'shŭn grāt'ing),
A variety of filter composed of lined grooves in a thin layer of aluminum-copper alloy on a glass surface; used in spectrophotometers to disperse light into a spectrum. See: monochromator.

diffraction grating

The device in a spectrophotometer that disperses white light into the colors (wavelengths) of the electromagnetic spectrum, using multiple lines precisely etched into an optically aligned material such as a specialized mirror or metal plate.

diffraction

Deviation of the direction of propagation of a beam of light, which occurs when the light passes the edge of an obstacle such as a diaphragm, the pupil of the eye or a spectacle frame. There are two consequences of this phenomenon. First, the image of a point source cannot be a point image but a diffraction pattern. This pattern depends upon the shape and size of the diaphragm as well as the wavelength of light. Second, a system of close, parallel and equidistant grooves, slits or lines ruled on a polished surface can produce a light spectrum by diffraction. This is called a diffraction grating. See Airy's disc; diffraction fringes; Maurice's theory.
References in periodicals archive ?
But regardless of X-ray potential, he says, using a diffraction grating to produce laser light "is a damn clever idea.
Overall it appears that diffraction gratings can potentially be used to identify food contact packaging effectively and economically; however, they are not yet ready for use commercially until a full industry-wide solution has been developed and commercialised," added Morrish.
Headwall makes diffraction gratings that are grooved to customers' precise specifications.
Photopolymers are the most promising material for the formation of diffraction gratings with good mechanical properties and chemical resistance.
Diffraction gratings made of polymeric materials have gained popularity in advanced optical systems (8) because they offer good performance at lower production cost when compared with their glass-made counterparts (9).
Fabrication will continue with formation of diffraction grating on surface of micromembranes and using different solution etchant.
Grown manufactures standard hot stamping products, golds, silvers, metallic colors, pigments, special effects (multi-colored print patterns), as well as holographic images and diffraction gratings.
This book aims to be a comprehensive beginners' guide to amateur spectroscopy using the most inexpensive equipment on the market, the replica diffraction grating in a 1.
The competition for all products on store market shelves has increased dramatically, and those that are designed and decorated with diffraction grating patterns have received the most attention and demonstrated the most sales.
A diffraction grating (DG) is a passive optical component that diffracts polychromatic light into its component wavelengths or monochromatic light into surfaces of constant phase, Fig.