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Applied Optics

Applied Optics


  • Vol. 20, Iss. 19 — Oct. 1, 1981
  • pp: 3327–3331

Echelle and holographic gratings compared for scattering and spectral resolution

John Kielkopf  »View Author Affiliations

Applied Optics, Vol. 20, Issue 19, pp. 3327-3331 (1981)

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An echelle grating with 316 grooves/mm and a 63° blaze angle is compared with a 3600-groove/mm holographic grating. The scattered light and resolution of the 10- × 20-cm gratings are photoelectrically evaluated in a 3-m spectrometer optimized to eliminate coma and baffled to minimize instrumental scattered light. Both gratings are ghost-free, but the holographic grating has substantially lower scattered light for test lines near 4000 Å and yields improved stray light rejection within absorption lines. It also exhibits slightly higher resolution. The throughput of the spectrometer with the holographic grating is about 5 times higher than the equivalent combination of spectrometer, echelle grating, and predisperser.

© 1981 Optical Society of America

Original Manuscript: May 29, 1981
Published: October 1, 1981

John Kielkopf, "Echelle and holographic gratings compared for scattering and spectral resolution," Appl. Opt. 20, 3327-3331 (1981)

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