Article
Article
Spectrograph
Article By:
Hilliard, Ron Optomechanics Research Inc., Vail, Arizona.
Last reviewed:June 2020
DOI:https://doi.org/10.1036/1097-8542.757213
An optical instrument that consists of an entrance slit, collimator, disperser, camera, and detector and that produces and records a spectrum. A spectrograph is used to extract a variety of information about the conditions that exist where light originates and along its paths. It does this by revealing the details that are stored in the light's spectral distribution, whether this light is from a source in the laboratory or a quasistellar object a billion light-years away.
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