a) Input Gaussian beam; (b) output top-hat beam; (c) phase

Beam shaping technology and its application in metal laser additive manufacturing: A review - ScienceDirect

Why Use a Flat Top Laser Beam?

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Convert Gaussian into a Top Hat Shapeoptics Technologies Holdings

Illustrating the improvement in pixel uniformity of the top-hat

PDF) Generation of Uniform X-ray Illumination and Its Application

a) Arrangement for converting a Gaussian beam into a top-hat

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PDF) Generation of Uniform X-ray Illumination and Its Application