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Absolute optical calibrations using a simple tungsten bulb: Theory

Research output: Contribution to conferenceOther


Publication date08/2001
Number of pages3
Original languageEnglish


Conference28th Annual European Meeting on Atmospheric Studies by Optical Methods
Period1/01/00 → …


The absolute spectral intensity calibration of optical detectors has always been difficult. In the past, this was only possible using expensive sources, which had been cross-calibrated against national standards. We describe a simple theoretical approach to absolute optical calibrations using any ordinary Tungsten light bulb. A key element of the theory is transforming Tungsten into an equivalent black body radiator. This permits direct application of Stefan- Boltzmann’s and Planck’s formulas of radiation.