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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 70, Iss. 12 — Dec. 1, 1980
  • pp: 1436–1452

Millimeter-wave model of a foveal receptor

Peter J. de Groot and Ronald E. Terpstra  »View Author Affiliations

JOSA, Vol. 70, Issue 12, pp. 1436-1452 (1980)

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This article provides experimental verification of the existence of discrete power distributions for a broadband frequency domain in a cross section of a dielectric antenna. The dielectric antenna used was chosen such that the directionally dependent acceptance of power was approximately the same as the psychophysically determined directional sensitivity to light of the foveal receptors (Stiles-Crawford I effect). Power summation in a cross section shows wavelength dependence on the directionally dependent acceptance of power, which is in good agreement with the <i>p</i>(λ) data of Stiles. Polarization dependence of the discrete power distribution occurs if power is dissipated in the antenna. Irradiation with electromagnetic energy waves from a broad wavelength band domain results in a discrete power distribution with minimum-maximum differences that are the same as those for a single wavelength from the domain, provided this wavelength gives rise to the same number of modes in the antenna. If the cross section of the antenna is elliptical the power distribution will not be influenced by the direction of polarization of the incident electromagnetic field. A small-diameter rod with a conical part attached in front shows a more pronounced directionally dependent acceptance of power than a small-diameter rod alone. The results obtained in this millimeter-wave experiment are compared with a model based on psychophysically determined effects such as the Stiles-Crawford I effect, transient Stiles-Crawford effect, and transient polarization adaptation. A discussion of these data leads us to conclude that the foveal receptors are dielectric antennas with a υ value of 2.31/λ, with λ in µm.

© 1980 Optical Society of America

Peter J. de Groot and Ronald E. Terpstra, "Millimeter-wave model of a foveal receptor," J. Opt. Soc. Am. 70, 1436-1452 (1980)

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