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Applied Optics

Applied Optics


  • Vol. 10, Iss. 5 — May. 1, 1971
  • pp: 1114–1118

Use of a Tungsten Filament Lamp as a Calibration Standard in the Vacuum Ultraviolet

J. L. Buckley  »View Author Affiliations

Applied Optics, Vol. 10, Issue 5, pp. 1114-1118 (1971)

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A tungsten ribbon filament lamp fitted with a sapphire window and operated at a temperature of 2800 K is shown to be a stable reproducible calibration source over the wavelength range 1500–2700 Å. Spectra of the lamp obtained using a 50-cm Ebert spectrometer and an extreme-solar-blind photomultiplier with pulse-counting electronics are reproducible to better than ±10% over this spectral range. Careful calibration of the spectrometer and photomultiplier has allowed a direct measurement of the absolute spectral radiance of the lamp, hence the apparent emissivity of the hot tungsten filament, from 1500 Å to 2700 Å.

© 1971 Optical Society of America

Original Manuscript: August 17, 1970
Published: May 1, 1971

J. L. Buckley, "Use of a Tungsten Filament Lamp as a Calibration Standard in the Vacuum Ultraviolet," Appl. Opt. 10, 1114-1118 (1971)

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