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Related Experiment Videos

Echelle gratings acting as one.

Peter Lindblom1

  • 1Multichannel Instruments AB, Pilotgatan 2,128 32 Skarpnäck Stockholm, Sweden. peter@systematix.se

Applied Optics
|August 15, 2003
PubMed
Summary

A novel echelle emulating device (EED) uses a prism between echelle gratings to produce order-sortable spectra. This innovative optical design mimics a single virtual echelle, simplifying spectral analysis.

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Area of Science:

  • Optics and Photonics
  • Spectroscopy
  • Instrumental Science

Background:

  • Echelle spectroscopy is crucial for high-resolution spectral analysis.
  • Existing echelle spectrographs can be complex and bulky.
  • A need exists for simplified, effective echelle spectral generation.

Purpose of the Study:

  • To introduce a new optical device for generating order-sortable echelle spectra.
  • To demonstrate an echelle emulating device (EED) that simplifies spectral dispersion.
  • To present a spectrograph design incorporating the EED.

Main Methods:

  • The echelle emulating device (EED) employs consecutive diffractions using multiple echelle grating surfaces.
  • A prism is integrated between echelle grating surfaces with a fixed refractive angle.
  • The device's optical properties are described by a modified grating equation.

Main Results:

  • The EED successfully reproduces the properties of a single virtual echelle.
  • The spectral order of the EED is the additive sum of individual grating orders.
  • A functional spectrograph utilizing the EED was designed and discussed.

Conclusions:

  • The echelle emulating device offers a simplified approach to generating order-sortable echelle spectra.
  • This device has potential applications in various spectroscopic fields.
  • The EED represents a significant advancement in spectrograph design.

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