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 ?
The experiment involved two independent variables which were the angular resolution and algorithm.
In addition, because the angular resolution of the telescope was [+ or -] 3[degrees], several directions included both open-sky regions and mountain regions.
For a requested angular resolution and FOV, the antenna array could be achieved with fewer receiving elements, which reduces the complexity and cost of the system.
In the first case (Figure 6(a)), the wide beamwidth of the FSAA antenna does not provide enough angular resolution to distinguish the two metallic bars, while FSAA with N = 9 and N = 15 do.
It combines angles of view and angular resolution of a system, that is it comprehensively characterises the electrooptical system.
Therefore, to reduce the angular aperture and increase the angular resolution the number of array elements should be increased.
Averaged velocity values resolved over different angular (temporal) resolutions revealed that both the axial mean and rms velocities remained unchanged for an angular resolution of up to 2[degrees].
Accordingly, JEM-X takes readings simultaneously with those of the SF1 and IBIS devices and provides imagery with arcminute angular resolutions within the 3 to 35 keV prime energy band.
has a high angular resolution to obtain sharp images of radio sources (with its high sensitivity, high-fidelity imaging, and excellent angular resolution, the SKA will have 20/20 vision compared with existing radio telescopes);
The image cadence thus allows a greatly enhanced temporal resolution coupled with the angular resolution coupled with the spectral resolution.
Moreover, says Bohlin, the CVO position sensor has been improved to offer exceptional angular resolution.