Perhaps you wrote in haste.
The diffraction from the lens does, of course, produce a slightly fuzzy (unsharp) representation of the image on the sensor. This fuzziness in the focal plane does, by no means depend on anything to do with the sensor.
well you donÂ´t know what we are talking about.
the fuzziness does not depend on the sensor sure.... nobody said it does.
but the RESOLUTION is limited when the airy disc is bigger then the photosites.
and the photosites depend on the sensor.
the bad thing is he gave you TWO links to get some infos.... but you seem to ignore it.
the lens (the lens design) has nothing to do with the resolution limit on sensor level.
it depends on the aperture and the wavelength of the light ONLY.
for this we assume a PERFECT lens.... so no negative effects by lens design (imperfections).
so even in 100 years you will still be bound by this simple rule of physics.
because you canÂ´t build a better lens then a PERFECT lens.
the only thing a REAL lens does it to make the diffraction effect WORSE.
but ultimately at some photosite size you canÂ´t resolve more details even with a physical and mathematical PERFECT lens.
to resolve more details you have to go to smaller wavelengths (smaller then visible light).
when you look at at this link: http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm
you should see why smaller photosites can not resolve more information then the size of the airy disc.
In fact the fuzziness is exactly the same whether there is a sensor there or not e.g. if film were used.
thatÂ´s correct but you have to think it through!
no matter if FILM or a DIGITAL SENSOR, when aperture and wavelength combination create an airy disc thatÂ´s bigger then a photosite or a grain on film, then you canÂ´t resolve more then that size of the airy disc. because there is not more INFORMATION.
ergo... at some point, independend from lens quality, more megapixel (smaller photosites) on a sensor will not result in better resolution.
Note that you will never see an Airy disk in a real photograph unless you photograph point sources.
you should read the articles again.
this one sentence shows your lack of understanding.
the first sentences in the wikipedia article should give you an hint:
"In optics, the Airy disk (or Airy disc) and Airy pattern are descriptions of the best focused spot of light that a perfect lens with a circular aperture can make, limited by the diffraction of light.
The most important application of this concept is in cameras and telescopes. Owing to diffraction, the smallest point to which a lens or mirror can focus a beam of light is the size of the Airy disk. Even if one were able to make a perfect lens, there is still a limit to the resolution of an image created by this lens. An optical system in which the resolution is no longer limited by imperfections in the lenses but only by diffraction is said to be diffraction limited."