Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992crasm.315...45l&link_type=abstract
Academie des Sciences (Paris), Comptes Rendus, Serie II - Mecanique, Physique, Chimie, Sciences de la Terre et de l'Univers (ISS
Astronomy and Astrophysics
Astronomy
2
Astronomical Spectroscopy, Fabry-Perot Spectrometers, Gratings (Spectra), Imaging Spectrometers, Fourier Transformation, High Resolution, Image Resolution, Lenses, Spectral Resolution
Scientific paper
An imaging spectrometer is described that can analyze all of the elements of astronomical images by means of a multilens array that isolates contiguous points of the image. The 'integral field' device is based on the use of a Fabry-Perot in cross dispersion with a grating yielding high resolution for a large spectral grating range. The device also employs techniques based on the principle of channeled spectra and the use of an insect-eye lens in conjunction with an interferometer. The spectra are arranged in different inclined rows to optimize coverage, and 400 spectra can be obtained with a 2000 x 2000-pixel receptor during 40-channel screening with a resolution of about 30,000 and a 200 nm range. The device is shown to have the same Doppler shift for each Fabry-Perot scanning step and a high number of channeled elements, which makes the device suitable for measuring radial velocities by means of correlation techniques.
Georgelin Yvon
Le Coarer Etienne
Monnet Guy
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