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Technical Physics

, Volume 63, Issue 3, pp 427–433 | Cite as

Enhancing Sensitivity of Methane Detection in Exoplanet Atmospheres and Nebulas Using Spectroscopic Methods

  • Yu. A. Tolmachev
  • M. P. Ivanov
  • V. A. Glukhov
Optics

Abstract

Technical development of optimal methods for detection of simple gas-phase molecules using rovibrational or rotational spectra by the simultaneous detection of several spectral lines of a molecular band with the aid of a comb filter is considered. Two variants for implementation of the methods are based on a spectrometer with the echelle grating with a limited number of elements and Fresnel lens (mirror) with specific ring components that serves as a grating. The Fresnel filter can be matched with the parameters of optics of astronomic instrumentation in the absence of a decrease in the effective aperture.

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • Yu. A. Tolmachev
    • 1
  • M. P. Ivanov
    • 1
  • V. A. Glukhov
    • 1
  1. 1.St. Petersburg State UniversitySt. PetersburgRussia

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