Two prime-focus spectrographs using holographic gratings

Details Two prime-focus spectrographs using holographic gratings Two prime-focus spectrographs using holographic gratings

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..696h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, July 1986, p. 696-700. NSERC-supported research.

Astronomy and Astrophysics

Astronomy

2

Gratings (Spectra), Holography, Spectrographs, Spectroscopic Telescopes, Focusing, Mirrors, Spectral Resolution

Scientific paper

Two simple low-resolution prime-focus spectrographs have been built and used at the Canada-France-Hawaii Telescope (CFHT). Both employ a concave holographic grating as the principal optical component. The spectrographs have typical efficiencies of 30 percent and operate over a 5000 A wavelength range. One spectrograph, a user instrument at the CFHT, allows both imaging and spectroscopy with a single detector. The second uses separate detectors for imaging and spectroscopy. Both are capable of limited two-dimensional long-slit spectroscopy with good images being obtained up to 2 mm off-axis.

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