echelle spectrograph

echelle spectrograph

See echelle grating.

echelle spectrograph

[e‚shel ′spek·trə‚graf]
(spectroscopy)
A spectrograph that employs gratings intended to be used in very high orders (greater than 10), and is equipped with a second dispersal element (another grating or a prism) at right angles to the first in order to separate the successive spectral strips from each other.
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References in periodicals archive ?
Keck Observatory in Hawaii, using the Near Infrared Echelle Spectrograph instrument.
9] ESPRESSO, the Echelle SPectrograph for Rocky Exoplanet and Stable Spectroscopic Observations, is to be installed on the ESO Very Large Telescope.
Tau Bootis b does not transit in front of its parent star from our viewpoint on Earth, but Lockwood and colleagues were able to tease out the weak light emitted by the planet using the Near Infrared Echelle Spectrograph (NIRSPEC) at the Keck Observatory in Hawaii.
Using data of tau Bootis b from the Near Infrared Echelle Spectrograph (NIRSPEC) at the W.
The researchers used the radial velocity or wobble method, which relies on Keck's High Resolution Echelle Spectrograph, or HIRES instrument, to spread light collected from the telescope into its component wavelengths or colors, in order to find the planet.
Our technique can easily be adapted to different echelle spectrographs in the visible and near infrared by simply using an etalon optimized for that particular spectrograph.