spectrograph

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Spectrograph McPherson 251MX

Spectrograph - a device for obtaining and permanent recording of the spectrum, for example electromagnetic radiation. It is a variation of the spectrometer, which registers the analyzed spectrum. Due to the fact that all (except for school) spectrometers register spectra, the division into spectrometers, spectroscopes, spectrographs disappears and the term spectrometer is used.

Due to the diversity of the spectra analyzed, the spectrometer term now includes a wide range of spectral devices (see spectroscopy).

Originally, the spectrograph was called an optical device for recording optical spectra on photographic plates. In optics, depending on the type of splitter, spectrographs can be prismatic or mesh. Prismatic wavelength spectrographs in the spectrum are usually performed by comparing the test spectrum with the standard spectrum. In spectrographs intended for testing infrared spectra, usually concave mirrors are used instead of collecting lenses, and as receivers thermocouples or thermocouples.

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