Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981opmep..48...23d&link_type=abstract
(Optiko-Mekhanicheskaia Promyshlennost', vol. 48, Jan. 1981, p. 23-26.) Soviet Journal of Optical Technology, vol. 48, Jan. 1981
Astronomy and Astrophysics
Astronomy
Fabry-Perot Interferometers, Fabry-Perot Spectrometers, Multiplexing, Stellar Spectrophotometry, Telescopes, Astronomical Photography, Circuits, High Resolution, Nebulae, Piezoelectricity, Stellar Spectra, Transmission Efficiency
Scientific paper
An Astrospectrometer, having a Fabry-Perot multiplex, is described. The spectrometer, mounted in the fixed focus system of the LAT telescope, has a 1:30 relative aperture, an operating spectral interval of 3600-6000 A, and a spectrometry resolution limit of 0.01 A. The dimensions of the multiplex spectrometer are smaller by a factor of two than those of a spectrometer having one etalon. The internal scheme of hybridizing the multiplex with a monochrometer results in a minimum number of optical elements, a high precision in the finishing of the operating surfaces of the multiplex plates, and a high stabilization accuracy; these advantages give a spectrometer transmission of 40 percent. The high-precision adjustment and stabilization of the gaps between the etalon plates make it possible to change the multiplex resolution without breaking the seal of the instrument, and to switch to different spectral ranges. In a spectrometer having the multiplex and multichannel receivers, a 150 A spectral interval is covered by scanning with a 0.01 A resolution in 30 channels, compared to a 12 A interval for spectrometers with only one etalon. The multiplex spectrometer can operate with a conventional single-channel receiver as well; the energy advantage is about seven times greater than for the operation of a spectrometer with one etalon, due to the large diaphragm.
Dombrovskaia A. B.
Golovko P. V.
Karpushko F. V.
Partiskaia G. G.
Valov N. I.
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