from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An echelle grating.


from Wiktionary, Creative Commons Attribution/Share-Alike License

French échelle ("ladder")


  • At the time, the instrument—CRIRES, or the cryogenic high-resolution infrared echelle spectrograph—may have been the most powerful land-based astronomical instrument in the world for identifying and characterizing gases such as methane on distant planets and stars, allowing for a more precise locating of the methane plumes than ever before.

    First Contact

  • CRIRES cryogenic high-resolution infrared echelle spectograph, 85–86, 88, 93

    First Contact

  • I would bump in the echelle metallic shelves on which you put the racks of sorted macarons and a couple of coques would fall on the floor.

    foodbeam » 2007 » July

  • 'Une bonne intention est une echelle trop courte.'

    In Kedar's Tents

  • His first work at the Opera Comique was the one-act opera, "La double echelle," produced in 1837 with success.

    The Standard Operas (12th edition) Their Plots, Their Music, and Their Composers

  • The Chief was short of stature, and he could only approach the window outside by calling one of the guards and ordering him to make the small ladder (_faire la petite echelle_).

    The Rome Express

  • When bodies of troops move in lines parallel to each other, but each somewhat in the rear of the other, so that their whole position resembles an echelle -- a flight of steps.

    Roman and the Teuton

  • The present program will obtain new STIS echelle spectra of both stars, which each were observed in selected wavelength windows by GHRS in the mid-1990's, and Alpha Cen A later by STIS in an extensive high-res program in 1999, although B unfortunately never was recorded by STIS.

    SpaceRef Top Stories

  • A real echelle spectrogram is not so uniform in intensity, nor are the echelle orders straight (they curve).

    New Scientist - Space

  • This image is NOT what a real echelle spectrum looks like.

    New Scientist - Space


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  • Echelle Spectrometers: The echelle grating was invented by Harrison in 1949. An echelle grating is a ruled plane diffraction grating with relatively few rulings (typically 300 grooves mm-1 or less).

    --Lauri H. J. Lajunen, 1992, Spectrochemical Analysis by Atomic Absorption and Emission, p. 176

    November 1, 2008

  • "fr. a ladder or stairs."

    October 9, 2008