Here is a page to introduce「Gauss- to-Top Hat beam shaper lenses,Laser Beam Shapers」- Tokyo Instruments, Inc.
Application Note: How to Select a Beam Shaping DOE
Gauss- to-Top Hat beam shaper lenses, Laser Beam Shapers
Micromachines, Free Full-Text
flat-top beams, explained by RP; top-hat beam, supergaussian, intensity profile, beam shaper
Top Hat Beam Shaper, Square Top Hat Spot
Coatings, Free Full-Text
Beam Shaping Solutions for Single & Multi Mode Lasers By Holo/Or
Flat-top laser beams: Their uses and benefits
Beam shapers for square top hats in the focal point
Thin Film Processing - PowerPhotonic
A compact polarization insensitive all-dielectric metasurface lens for Gaussian to tophat beam shaping in sub-terahertz regime - ScienceDirect
Laser Beam Shaping Overview
PDF) Gauss to top-hat beam shaping with aspheres
532nm, 25.4mm Dia., Top-Hat Diffractive Beam Shaper
Design of a Refractive Beam Shaper to Generate a Circular