Airyschijven
Airyschijven are a concept in optical physics, representing ideal, thin, transparent disks that exhibit specific diffraction patterns. Named after the astronomer George Biddell Airy, who studied the diffraction patterns produced by lenses, an Airyschijf is essentially the central bright spot in the diffraction pattern of a point source of light when viewed through a circular aperture. This pattern is also known as the Airy disk. The Airyschijf is not a physical object but a theoretical construct used to describe the resolution limits of optical instruments.
The size of the Airyschijf is inversely proportional to the diameter of the aperture and directly proportional