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Absolute optical calibration using a simple tungsten light bulb: Experiment

Research output: Contribution to conferenceOther

Published

  • M. J. Kosch
  • S. Mäkinen
  • F. Sigernes
  • O. Harang
  • F. Sigernes (Editor)
  • D. A. Lorentzen (Editor)
Publication date2003
Number of pages5
Pages50-54
Original languageEnglish

Conference

ConferenceProceedings of the 30th Annual European Meeting on Atmospheric Studies by Optical Methods
Period1/01/00 → …

Abstract

Absolute spectral intensity calibration of optical detectors has always been difficult. Up to now it was only possible through the use of expensive sources, which are cross-calibrated against national standards. At the 28AM optical meeting, a simple theoretical approach to absolute optical calibrations was described using any ordinary tungsten light bulb [1]. A key element of the theory is transforming tungsten into its equivalent blackbody radiator. This permits direct application of Stefan-Bolzmann’s and Planck’s formulas of radiation. The theory has been tested by comparing three household tungsten light bulbs with a calibrated source at several wavelengths typically used in auroral research. The results of this experiment are most encouraging.