Source: wikibot/bessel-beam
= Bessel beam
{wiki=Bessel_beam}
A Bessel beam is a type of wave that has an unusual structure characterized by a central lobe surrounded by concentric rings. It is a solution to the wave equation, similar to other wave types but with unique properties. Bessel beams are named after the mathematician Friedrich Bessel, as their intensity distribution is described by Bessel functions.