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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 6, Iss. 3 — May. 1, 1922
  • pp: 254–267

Optics InfoBase > JOSA > Volume 6 > Issue 3 > CRITICAL FREQUENCY RELATIONS IN SCOTOPIC VISION

CRITICAL FREQUENCY RELATIONS IN SCOTOPIC VISION

HERBERT E. IVES

JOSA, Vol. 6, Issue 3, pp. 254-267 (1922)
http://dx.doi.org/10.1364/JOSA.6.000254


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Citation
HERBERT E. IVES, "CRITICAL FREQUENCY RELATIONS IN SCOTOPIC VISION," J. Opt. Soc. Am. 6, 254-267 (1922)
http://www.opticsinfobase.org/josa/abstract.cfm?URI=josa-6-3-254


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References

  1. T. C. Porter, Proc. R. S., 70, 313–329, 1902.
  2. Ives, Phil. Mag., Sept., 1912, p. 352.
  3. Allen, Phil. Mag., July, 1919, p. 82.
  4. Ives and Kingsbury, Phil. Mag., April, 1916, p. 290.
  5. Made and calibrated by the Eastman Kodak Co.
  6. Wratten monochromatic filter for isolating blue mercury lines.
  7. The constant 2 is introduced in order to have an expression in terms of the rangeof fluctuation, according to the diffusion theory.
  8. The points shown for discs B1 and C1, in Fig. 4 which were not included in the main series, are extrapolated from the A1 and D1 values by utilizing the well determined ratio previously obtained.
  9. The use of this factor, which is called for by the "diffusion" theory (see ref. 4) leads to formulae in which the first periodic term figures as a square. Actually, due to the short frequency range in which all the observations fall, the formulae involving the square fit the data nearly as well as (7). They demand, however, in order to fit, a value of δ of about .001. This is so far below the very large values of the Fechner fraction which hold at low intensities as to force the conclusion that the diffusion theory must be modified if it is to cover this illumination region.

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