Here is a page to introduce「Gauss- to-Top Hat beam shaper lenses,Laser Beam Shapers」- Tokyo Instruments, Inc.
Beam Expander is critical for Beam Shaping – Precision Laser Scanning
Convert Gaussian into a Top Hat Shapeoptics Technologies Holdings
Beam shaping technology and its application in metal laser additive manufacturing: A review - ScienceDirect
Design of new refractive Gaussian to top-hat beam shaper with gradient photonic crystal
PDF] Creating round and square flattop laser spots in microprocessing systems with scanning optics
Application Note: How to Select a Beam Shaping DOE
Beam Shaping
Laser Beam Shaping Overview
532nm, 25.4mm Dia., Top-Hat Diffractive Beam Shaper
Laser Beam Shaping Overview
Enhancing laser thin-film ablation
Focusing Beam Intensity with Top Hat Beam Shapers
Where to buy beam shapers, diode bars, manufacturers and suppliers - RP Photonics Buyer's Guide
Laser-Beam Shaping - DIOPTIC GmbH