The study of the applicability of a nano-polycrystalline diamond (NPD) as a lens material is presented. Two NPD plates with a diameter of 8 mm and a thickness of 0.1 and 1 mm were manufactured using the HPHT process. Coherence preservation properties of the NPD samples were checked using in-line phase-contrast imaging. Wide-Angle X-ray Scattering and Small Angle X-ray Scattering experiments were performed to examine the NPD scattering properties. Rotationally parabolic half-lens from a 100 μm thick NPD plate was manufactured using the maskless direct milling using a Zeiss CrossBeam 540 FIB-SEM system.
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