diffraction limit


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diffraction limit

The finest detail that can be resolved by a telescope, limited by diffraction to a value proportional to λ/d , where λ is the wavelength of the radiation under observation and d is the telescope aperture. See also aperture; resolution.
References in periodicals archive ?
In fact, the diffraction limit was never a "hard" limit, and several caveats exist that point the way toward subdiffraction imaging.
This diffraction limit arises from the fact that it is impossible to focus light to a spot smaller than half its wavelength.
This novel optical device harmlessly resolves fluorescently labeled bits of living cells that are smaller than the so-called diffraction limit, say its developers at the Max Planck Institute for Biophysical Chemistry in Gottingen, Germany.
Optical lenses are limited by the nature of light, the so-called diffraction limit, so even the best won't usually let us see objects smaller than 200 nanometers across, about the size of the smallest bacterium.
The presence and persistence of atmospheric turbulence means that the same telescope at the best site in the world actually produces images of stars blurred to a diameter at least 10 times greater than the telescope's diffraction limit.
The reason they're so critical is that they can affect extremely small-scale objects, smaller than the diffraction limit, or half of the wavelength of light used to create SPPs.
But by making the distance from the aperture to the surface being viewed much smaller than the wavelength of the illuminating light, researchers can evade the diffraction limit and generate high-resolution images of surfaces (see diagram).
Future nodes are expected to deploy EUV lithography in order to print features beyond the diffraction limit associated with 193nm lithography.
far below the diffraction limit, is enhanced by the effect that electromagnetic fields cause in the charge of the object.
On the two days calculated so far, Nisenson says, the supernova's size was just below the telescope's diffraction limit, the point at which the telescope would be optically incapable of resolving detail even if the atmosphere were not present.
BOSTON -- Bruker Corporation (NASDAQ: BRKR) announced today at the Materials Research Society (MRS) Fall 2010 Meeting the AcuityXR[TM], a novel optical surface profiler mode that combines unique, patent-pending Bruker hardware and software technology to enable select ContourGT[TM] non-contact, 3D optical surface profilers to break the optical diffraction limit and deliver lateral resolutions that were previously considered impossible to achieve.
Surprisingly, little attention has been devoted to graphene-based nanophotonic applications where optical fields are confined far below the diffraction limit.