Rayleigh criterion

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criterion, Rayleigh 

Observation first made by Rayleigh that the images of two point objects will be resolved when the central maximum in the diffraction pattern of one image coincides with the first minimum of the diffraction pattern of the other image. For a perfect eye, with a 2 mm pupil, this criterion corresponds to a theoretical tolerance in focusing equal to about 0.075 D. See Airy's disc; diffraction; limit of resolution.
References in periodicals archive ?
Analysis of the experimental data and the results of calculations show that the qualitative picture of the flow with the values of the Rayleigh criterion to [10.sup.17] is modeled correctly.
It is shown that the distribution of the dimensionless temperature and the heat flux density along the boundaries does not depend on the turbulence model and is not dependent on Rayleigh criterion. This is in good agreement with the experimental data, but the quantitative characteristics for some regimes have significant differences.
The stability conditions are set by [[kappa].sup.2] [greater than or equal to] 0, [v.sup.2] [greater than or equal to] 0, and [l.sup.2] [greater than or equal to] 0, wherein l is the specific angular momentum known as Rayleigh criterion (Rayleigh, 1917; Landau, 1987).
Such an instrument meets the Rayleigh criterion only if the r.m.s.