Prof. Christiane Ziegler Profile

Prof. Christiane Ziegler

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Proceedings Article | 22 February 2018 Presentation + Paper

Two-photon laser lithography in optical metrology

Julian Hering, Matthias Eifler, Linda Hofherr, Christiane Ziegler, Jörg Seewig, Georg von Freymann

Proceedings Volume 10544, 1054412 (2018) https://doi.org/10.1117/12.2289900

KEYWORDS: Calibration, Lithography, Point spread functions, Polymerization, Additive manufacturing, Standards development

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Two-photon laser lithography has become one of the most promising additive manufacturing techniques on the micron scale and is applied, e.g., in fields of micro-optics and -robotics as well as optical and mechanical metamaterials. Here, we report on the feasibility, limits and general benefits of this method to fabricate material measures for the calibration of industrial optical topography measuring devices. Since calibration procedures are essential in the scientific and industrial application of those measuring instruments, appropriate material measures are highly required. In contrast to traditional manufacturing technologies, we show that two-photon laser lithography allows a highly resolved fabrication of multiple, almost arbitrary standardized calibration geometries on a micron length scale. Hereby, all structures are fabricated on only one single substrate, therefore enabling a mapping of a broad range of metrological characteristics for topography characterization. The most required calibration geometries are manufactured and analyzed regarding their aging behavior, their quality improvement by a post-UV development and the resolution limits within the manufacturing as well as the calibration process. Thus, the general industrial and scientific relevance of manufacturing material measures with two-photon laser lithography is demonstrated.

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