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Surface smoothening of the inherent roughness of micro-lenses fabricated with 2-photon lithography

机译:用2光子光刻技术制作的微透镜固有粗糙度的表面平滑

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Two-photon polymerization by direct laser writing enables to write refractive micro-optical elements with sub-urn precision. The trajectories and layering during the direct writing process often result in roughness in the range of the writing increment, which has adverse effects for optical applications. Instead of increasing overlap between adjacent voxels, roughness in the range of 100 nm can be smoothed out by post-processing. For this a method known as TASTE was developed, which allows polishing of surfaces without changing the structural details or the overall shape. It works particularly well with thermoplastic polymers and enables sub-10 nm roughness. The optical quality was confirmed for an array with several 100 microlenses.
机译:通过直接激光写入的双光子聚合使得能够以亚precision精度写入折射微光学元件。直接写入过程中的轨迹和分层通常会导致写入增量范围内的粗糙度,这对光学应用会产生不利影响。代替增加相邻体素之间的重叠,可以通过后处理来平滑100 nm范围内的粗糙度。为此,开发了一种称为TASTE的方法,该方法可以在不改变结构细节或整体形状的情况下对表面进行抛光。它与热塑性聚合物的配合效果特别好,并且粗糙度低于10 nm。确认具有几百个微透镜的阵列的光学质量。

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