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Applied Optics

Applied Optics


  • Vol. 42, Iss. 22 — Aug. 1, 2003
  • pp: 4549–4559

Echelle gratings acting as one

Peter Lindblom  »View Author Affiliations

Applied Optics, Vol. 42, Issue 22, pp. 4549-4559 (2003)

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A new device for producing order-sortable echelle spectra by use of consecutive diffractions in several echelle grating surfaces is described. This echelle emulating device (EED) comprises a prism placed in the path between a pair of echelle grating surfaces. The refractive angle of the prism is fixed through a simple relation. The device reproduces all the main properties of a single virtual echelle, obtained from a simple grating equation describing the combined action of the gratings and the prism. The spectral order of the EED is the sum of the spectral orders of the individual gratings. A spectrograph that utilizes the device is described, and several applications are discussed.

© 2003 Optical Society of America

OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(230.1950) Optical devices : Diffraction gratings
(300.6170) Spectroscopy : Spectra

Original Manuscript: April 15, 2003
Published: August 1, 2003

Peter Lindblom, "Echelle gratings acting as one," Appl. Opt. 42, 4549-4559 (2003)

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