Suche nach „[S.] [Groening]“ hat 3 Publikationen gefunden
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    F: Maschinenbau und Mechatronik


    S. Groening, Bernhard Sick, M. Wimmer

    Licht unter der Lupe: Messung optischer Wellenfronten mit Mikrolinsensystemen - Herausforderungen an die Signalverarbeitung

    Laser + Photonik, no. 1, pp. 36-40


    F: Maschinenbau und Mechatronik


    S. Groening, Bernhard Sick, K. Donner, J. Pfund, N. Lindlein, J. Schwider

    Wave-front Reconstruction with a Shack-Hartmann Sensor with an Iterative Spline Fitting Method

    Applied Optics (Optical Technology Division), vol. 39, no. 4, pp. 561-567


    DOI: 10.1364/AO.39.000561

    Abstract anzeigen

    One limitation of the conventional Shack–Hartmann sensor is that the spots of each microlens have to remain in their respective subapertures. We present an algorithm that assigns the spots to their reference points unequivocally even if they are situated far outside their subaperture. For this assignment a spline function is extrapolated in successive steps of the iterative algorithm. The proposed method works in a single-shot technique and does not need any aid from mechanical devices. The reconstruction of a simulated steep aspherical wave front (∼100λ/mm slope) is described as well as experimental results of the measurement of a spherical wave front with a huge peak-to-valley value (∼400λ). The performance of the method is compared with the unwrapping method, which has been published before.

    F: Maschinenbau und Mechatronik

    Beitrag (Sammelband oder Tagungsband)

    S. Groening, Bernhard Sick

    Wavefront Reconstruction for a Shack-Hartmann Sensor Using an Iterative Spline Fitting Method

    Proceedings of the 9th International Trade Fair and Conference for Sensors, Transducers & Systems (Sensor ’99); Volume 2, Nürnberg, 18.-20.05.1999