Method and apparatus for shaping focused laser beams

Abstract

Beam shaping methods, systems, devices and apparatus to provide transformation of a TEM00 beam which intensity distribution is described by the Gaussian or similar functions to a focused spot of round or square shape with uniform intensity distribution achieved through introducing in the TEM00 beam a phase shift function with smooth phase transition and further focusing of the transformed beam; the resulting intensity distributions are created around the focal plane of a focusing optical system. The phase shift function is introduced by a phase transforming optical system implemented in apparatuses of the invention in form of a plate, or a telescope, or a collimator, or integrated to the focusing optical system: the phase transforming optical system including an aspheric optical surface providing the phase shift function with smooth phase transition. As a focusing optical system any diffraction limited optics with positive dioptric power can be applied.

Dependencies are inferred from the claim text.