LASER BEAM APODISATION DEVICE Russian patent published in 2016 - IPC G02B27/58 

FIELD: physics.

SUBSTANCE: laser beam apodisation device includes, mounted on the laser beam propagation path, a beam aperture former and, periodically distributed on the entire edge of the beam aperture, elements in the form of surface or volume fractures of a substrate made of a transparent dielectric or a plurality of surface and volume fractures of a substrate made of a transparent dielectric, and, also mounted further on the laser beam propagation path, a spatial frequency filter and an image recorder. A polarising-selecting element is mounted between the spatial frequency filter and the substrate, based on which the beam aperture former and the elements periodically distributed on the entire edge of the beam aperture are made.

EFFECT: high accuracy of reproducing the required shape of the peripheral spatial profile of the apodised beam.

2 cl, 2 dwg