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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 36, Iss. 10 — Oct. 1, 1946
  • pp: 561–566

A Multi-Step Sector Photometer

J. A. VAN DEN AKKER  »View Author Affiliations

JOSA, Vol. 36, Issue 10, pp. 561-566 (1946)

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J. A. VAN DEN AKKER, "A Multi-Step Sector Photometer," J. Opt. Soc. Am. 36, 561-566 (1946)

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  1. Medium quartz spectrograph, manufactured by the Bausch and Lomb Optical Company, Rochester, New York.
  2. F. Twyman and C. B. Allsopp, The Practice of Absorption Spectrophotometry (Adam Hilger, Ltd., London, 1934).
  3. Wallace R. Brode, Chemical Spectroscopy (John Wiley and Sons, Inc., New York, 1934).
  4. George R. Harrison, "Current advances in photographic photometry," J. Opt. Soc. Am. 24, 59–72 (1934).
  5. F. Twyman, L. J. Spencer, and A. Harvey, "Rapid spectrophotometry with bi-multiple spectra and a new type of wedge cell," Trans. Opt. Soc. (London) 33, 37–53 (1931).
  6. B. O'Brien, "A null method of photographic spectrophotometry with a spiral aperture sector disk," J. Opt. Soc. Am. 22, 426A (1932).
  7. Sample is here used in a general sense; it may refer to a transparent solid or liquid, a solid reflecting body, or to a light source. Standard refers to the corresponding reference body—that is, air, or matched cell containing the solvent, a standard of reflectance, or a standard light source.
  8. George R. Harrison and E. P. Bentley, "An improved high speed recording photometer," J. Opt. Soc. Am. 30, 290–294 (1940).
  9. J. H. Webb, "The relationship between reciprocity law failure and the intermittency effect in photographic exposure," J. Opt. Soc. Am. 23, 157–169 (1933).
  10. 10 .The strict treatment would include the exponential term, exp (- µx), in the weighting function, where µ is the absorption coefficient for the radiation in the fused silica, and x is the instantaneous path length in the fused silica.
  11. A fortunate result of the rotation of the sample and standard surfaces is that the energy of the condensed radiation is distributed around an annulus of appreciable circumference.

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