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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 36 — Dec. 20, 1998
  • pp: 8352–8360

Investigation of the Wavelength Accuracy of Brewer Spectrophotometers

Julian Gröbner, David I. Wardle, C. Thomas McElroy, and James B. Kerr  »View Author Affiliations


Applied Optics, Vol. 37, Issue 36, pp. 8352-8360 (1998)
http://dx.doi.org/10.1364/AO.37.008352


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Abstract

The wavelength accuracy of the Brewer spectrophotometer in the 280–360-nm spectral range is improved by a new grating-drive mechanism and a new dispersion function derived from the Brewer geometry. With the new mechanism, the reproducibility of wavelength settings for spectral emission lines is better than 0.3 pm (0.0003 nm) and, with a thermally compensated version, the effect of temperature is less than 0.4 pm K<sup>−1</sup>. The new dispersion function fits spectral line positions better than the standard function and is less prone to extrapolation error. Applying the new function to data from four new and ten standard drives shows that the new drives perform as well as the best of the standard ones and much better than the majority.

© 1998 Optical Society of America

OCIS Codes
(010.4950) Atmospheric and oceanic optics : Ozone
(120.4140) Instrumentation, measurement, and metrology : Monochromators
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

Citation
Julian Gröbner, David I. Wardle, C. Thomas McElroy, and James B. Kerr, "Investigation of the Wavelength Accuracy of Brewer Spectrophotometers," Appl. Opt. 37, 8352-8360 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-36-8352


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References

  1. J. B. Kerr and C. T. McElroy, “Evidence for large upward trends of ultraviolet-B radiation linked to ozone depletion,” Science 262, 1032–1034 (1993).
  2. C. S. Zerefos, A. F. Bais, C. Meleti, and I. C. Ziomas, “A note on the recent increase of solar UV-B radiation over northern middle latitudes,” Geophys. Res. Lett. 22, 1245–1247 (1995).
  3. J. B. Kerr, C. T. McElroy, D. I. Wardle, R. A. Olafson, and W. F. J. Evans, “The automated Brewer spectrophotometer,” in Atmospheric Ozone: Proceedings of the Quadrennial Ozone Symposium, C. S. Zereros and A. Ghazi, eds. (Reidel, Boston, Mass., 1985), pp. 396–401.
  4. A. F. Bais, C. S. Zerefos, and C. T. McElroy, “Solar UVB measurements with the double- single-monochromator Brewer ozone spectrophotometer,” Geophys. Res. Lett. 23, 833–836 (1996).
  5. D. I. Wardle, C. T. McElroy, J. B. Kerr, E. Wu, and K. Lamb, “Laboratory tests on the double Brewer spectrophotometer,” in Proceedings of the 1996 Quadrennial Ozone Symposium, R. D. Bojkov and G. Visconti, eds. (Parco Scientifico e Tecnologico d’Abruzzo, Italy, 1998), pp. 997–1000.
  6. F. Kuik and W. Wauben, “UV intercomparison SUSPEN,” Technical Report TR-203 (Royal Netherlands Meteorological Institute, De Bilt, The Netherlands, 1998).
  7. H. Slaper, H. Reinen, M. Blumthaler, M. Huber, and F. Kuik, “Comparing ground-level spectrally resolved solar UV measurements using various instruments: a technique resolving effects of wavelength shift and slit width,” Geophys. Res. Lett. 22, 2721–2724 (1995).

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