We compare micromachining results with Gaussian and Bessel beams using an UV picosecond laser system and demonstrate feasibility to produce tungsten gratings for x-ray interferometry medical imaging. and sub-micrometer size hole patterns. The advantages of Bessel beams compared to Gaussian beams. are demonstrated for micromachining of rectangular shallow profile gratings with sharp ed... https://parisnaturalfoodes.shop/product-category/nutri-sea-omega-3/