Physics – Optics
Scientific paper
Feb 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apopt..17..404d&link_type=abstract
Applied Optics, vol. 17, Feb. 1, 1978, p. 404-414. Research supported by the Statens Naturvetenskapliga Forskningsrad.
Physics
Optics
15
Astronomical Spectroscopy, Echelle Gratings, Gratings (Spectra), Holographic Spectroscopy, Spectral Resolution, Absorption Spectroscopy, Grooves, Helium-Neon Lasers, Instrument Errors, Light Scattering, Line Spectra, Wave Dispersion
Scientific paper
Holographic gratings cause much less stray light and spectral degradation than classically ruled gratings. Their high groove densities enable high dispersion in first diffraction order and a high spectrograph throughput comparable to the best echelles. Their lower reflective efficiency is compensated by the avoidance of cross dispersers, enabling efficient high-fidelity spectroscopy with single-pass spectrographs. Instrumental profiles of the ESO coude spectrograph with large holographic and ruled gratings have been studied in detail, and their effects on astronomical spectra are discussed and compared to those of other instruments.
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