Echelle gratings

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• Echelle grating — An echelle grating (from French, échelle , meaning stairs or ladder) is a type of diffraction grating which is characterised by a relatively low grooves density but is optimized for high diffraction orders. Echelle gratings are, like other types… …   Wikipedia

• Diffraction grating — A very large reflecting diffraction grating. In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. The directions of these beams …   Wikipedia

• Red de difracción — Saltar a navegación, búsqueda En óptica, una red de difracción es un componente óptico con un patrón regular, que divide (difracta) la luz en varios haces que viajan en diferentes direcciones. Las direcciones de esos haces depende del espaciado… …   Wikipedia Español

• Blazed grating — A blazed grating is a special type of diffraction grating used in astronomical telescopes.Blazed gratings produce maximum efficiency at a specified wavelength; that is, a diffraction grating that is blazed at 250nm will operate most efficiently… …   Wikipedia

• Spectrometer — This article is about Spectrometers. For the spectral density measuring instrument, see Spectrogram. Grating spectrometer schematic A spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of… …   Wikipedia

• ЭШЕЛЕТТ — (эшелет) (франц. echelette, от echelle лестница), отражательная дифракционная решётка, способная концентрировать дифрагированное излучение в к. л. определённом (но не нулевом) порядке спектра n (см. ПОРЯДОК ИНТЕРФЕРЕНЦИИ), ослабляя остальные. Это …   Физическая энциклопедия

• nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …   Universalium