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Applied Optics

Applied Optics


  • Vol. 9, Iss. 12 — Dec. 1, 1970
  • pp: 2650–2652

Photon Counting During an Eclipse

S. R. Weart  »View Author Affiliations

Applied Optics, Vol. 9, Issue 12, pp. 2650-2652 (1970)

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We have built an instrument that counts pulses from photomultipliers that look at four bands of solar continuum, recording the changes in intensity during an eclipse. We use a plywood spectrograph to select an ultraviolet band and interference filters for the others. The number of counts seen in 1 20 sec is displayed for the subsequent 1 20 sec on binary light-emitting diodes which are photographed. Our experiment can attain a spatial resolution of better than 0.1 see of arc and an accuracy in irradiance of better than 3%.

© 1970 Optical Society of America

Original Manuscript: June 1, 1970
Published: December 1, 1970

S. R. Weart, "Photon Counting During an Eclipse," Appl. Opt. 9, 2650-2652 (1970)

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  1. U. S. Naval Observatory, Astronomical Papers Vol. 17: The Marginal Zone of the Moon (1963).
  2. S. R. Weart, J. E. Faller, Astrophys. J. 157, 887 (1969). [CrossRef]
  3. S. R. Weart, “Photoelectric Eclipse Observations of Continuum and Coronal Line Emission at the Solar Limb,” JILA Report No. 96 (1968).

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