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Physics of Vision in Compound Eyes
Invertebrates are the class par excellence where one finds all manner of variations in the structure and arrangement of photoreceptors and their associated light-gathering and processing structures.Expand
Coupled-Mode Theory for Optical Fibers
A set of coupled-mode equations is derived to describe mode propagation in uniform and slightly nonuniform cylindrical optical-fiber systems. The coupling between fibers of an array made up of nExpand
Comparative Physiology and Evolution of Vision in Invertebrates
Photoreceptor diameter and spacing for highest resolving power.
The maximum center-to-center angular spacing delta phi of photoreceptors tolerated for reconstructing the highest spatial frequency passed by a diffraction-limited pupil of diameter D is delta phi -Expand
Acuity of compound eyes: Physical limitations and design
  • A. Snyder
  • Physics
  • Journal of comparative physiology
  • 2004
SummaryThe two fundamental limitations to resolving power of compound eyes are the wave (diffraction) and particle (photon noise) nature of light. By appreciating their interrelationship we gainExpand
The Stiles-Crawford effect--explanation and consequences.
The physical properties of an isolated human foveal cone completely determine the Stiles-Crawford effect of the first kind (SC—1) both in the sensitivity to angle of incidence and in the great variation of that sensitivity to wavelength. Expand
Polarization sensitivity of individual retinula cells
  • A. Snyder
  • Physics
  • Journal of comparative physiology
  • 1 December 1973
SummaryThis paper elucidates the influence of the structure of a rhabdom on the polarization sensitivity of its retinula cells. The terminology polarization sensitivity (PS) and dichroic sensitivityExpand
Polarised light detection in the bee,Apis mellifera
Evidence is found for the mechanisms underlying the integration of polarisation information coming from the 9th cells, and the microvilli orientation of these cells in neighbouring ommatidia in different eye regions, which are consistent with v. Frisch's findings on the orientation to polarised light by the worker bee. Expand
Is integer arithmetic fundamental to mental processing?: the mind's secret arithmetic
This provocative hypothesis that the mental machinery for performing lightning–fast integer arithmetic calculations could be within us all even though it cannot be readily accessed is led by analysing the extraordinary skills of autistic savants. Expand
Telephoto lens system of falconiform eyes
It is shown here that the presence of a spherical depression in the deep fovea of falconiforms may act like the negative lens component in a telephoto lens system or opera glass, thus providing the relatively large images necessary for more complete image reconstruction in a localised region of the retina. Expand