@article{KazasidisVerpoortSolovievetal.2018, author = {Kazasidis, Orestis and Verpoort, Sven and Soloviev, Oleg and Vdovin, Gleb and Verhaegen, Michel and Wittrock, Ulrich}, title = {Extended-image-based correction of aberrations using a deformable mirror with hysteresis}, series = {Opt. Expr.}, volume = {26}, journal = {Opt. Expr.}, doi = {10.1364/OE.26.027161}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-14759}, pages = {27161 -- 27178}, year = {2018}, abstract = {With a view to the next generation of large space telescopes, we investigate guide-star-free, image-based aberration correction using a unimorph deformable mirror in a plane conjugate to the primary mirror. We designed and built a high-resolution imaging testbed to evaluate control algorithms. In this paper we use an algorithm based on the heuristic hill climbing technique and compare the correction in three different domains, namely the voltage domain, the domain of the Zernike modes, and the domain of the singular modes of the deformable mirror. Through our systematic experimental study, we found that successive control in two domains effectively counteracts uncompensated hysteresis of the deformable mirror.}, language = {en} } @inproceedings{KazasidisVerpoortWittrock2018, author = {Kazasidis, Orestis and Verpoort, Sven and Wittrock, Ulrich}, title = {Algorithm design for image-based wavefront control without wavefront sensing}, series = {SPIE Optical Instrument Science, Technology, and Applications, Proc. SPIE}, volume = {10695}, booktitle = {SPIE Optical Instrument Science, Technology, and Applications, Proc. SPIE}, doi = {10.1117/12.2312523}, url = {http://nbn-resolving.de/urn:nbn:de:hbz:836-opus-14760}, pages = {1069502}, year = {2018}, abstract = {Active optics is an enabling technology for future large space telescopes. Image-based wavefront control uses an image-sharpness metric to evaluate the optical performance. A control algorithm iteratively adapts a corrective element to maximize this metric, without reconstructing the wavefront. We numerically study a sharpness metric in the space of Zernike modes, and reveal that for large aberrations the Zernike modes are not orthogonal with respect to this metric. The findings are experimentally verified by using a unimorph deformable mirror as corrective element. We discuss the implications for the correction process and the design of control algorithms.}, language = {en} } @book{Dickmann1989, author = {Dickmann, Klaus}, title = {Untersuchungen {\"u}ber den Einsatz von Hochleistungslasern zum Trennen von Elektroblechen}, volume = {Reihe 2; 1}, publisher = {VDI-Verl.}, address = {D{\"u}sseldorf}, isbn = {3-18-148702-3}, pages = {II, 151 S. : graph. Darst.}, year = {1989}, language = {de} } @book{MertinsGilbert2006, author = {Mertins, Hans-Christoph and Gilbert, Markus}, title = {Pr{\"u}fungstrainer Experimentalphysik}, edition = {1. Aufl.}, publisher = {Elsevier, Spektrum, Akad. Verl.}, address = {M{\"u}nchen [u.a.]}, isbn = {3-8274-1733-3}, pages = {XII, 372 S. : graph. Darst.}, year = {2006}, language = {de} } @book{OPUS4-1746, title = {Adaptive optics for industry and medicine. 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IFMBE Proceedings World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany Vol. 25/7 Diagnostic and Therapeut}, edition = {Springer Berlin Heid}, isbn = {978-3-642-03884-6}, pages = {845 -- 847}, year = {2009}, language = {en} } @article{Wittrock2010, author = {Wittrock, Ulrich}, title = {Laryngeally echolocating bats (Brief Communication Arising)}, series = {Nature}, volume = {466}, journal = {Nature}, doi = {10.1038/nature09156}, pages = {E6}, year = {2010}, language = {mul} } @incollection{VerpoortWittrock2009, author = {Verpoort, Sven and Wittrock, Ulrich}, title = {Miniaturized adaptive mirror for solid state laser resonators}, series = {Proceedings of the 7th International Workshop on Adaptive Optics for Industry and Medicine, Shatura, Russia}, booktitle = {Proceedings of the 7th International Workshop on Adaptive Optics for Industry and Medicine, Shatura, Russia}, year = {2009}, language = {en} } @incollection{SchulzeDeemannHartensueretal.2010, author = {Schulze, M and Deemann, D and Hartensuer, R and Koch, R and L{\"o}hrer, L and MJ, Raschke and UM, H{\"o}lscher and Vordemvenne, T.}, title = {A New Combined Optical and Robotic Testing System to Evaluate Multisegmental Spinal Kinematics}, series = {Lim CT, Goh JCH, eds. 6th World Congress of Biomechanics (WCB 2010) August 1-6, 2010 Singapore}, booktitle = {Lim CT, Goh JCH, eds. 6th World Congress of Biomechanics (WCB 2010) August 1-6, 2010 Singapore}, publisher = {Springer}, address = {Berlin, Heidelberg}, isbn = {978-3-642-14515-5}, pages = {580 -- 583}, year = {2010}, language = {en} } @article{SchulzeDeemannHartensueretal.2010, author = {Schulze, M and Deemann, D and Hartensuer, R and L{\"o}hrer, L and MJ, Raschke and H{\"o}lscher, U and Vordemvenne, T.}, title = {Investigation of multisegmental spinal biomechanics with a combined optical and robotic test setup}, series = {Langenbecks Archives of Surgery}, volume = {395}, journal = {Langenbecks Archives of Surgery}, pages = {769 -- 829}, year = {2010}, language = {en} } @article{SchulzeDeemannHartensueretal.2010, author = {Schulze, M and Deemann, D and Hartensuer, R and L{\"o}hrer, L and MJ, Raschke and H{\"o}lscher, U and Vordemvenne, T.}, title = {A new in vitro biomechanical test system to evaluate adjacent level effects of the lumbar spine (P 62)}, series = {European Spine Journal}, volume = {19}, journal = {European Spine Journal}, pages = {233 -- 364}, year = {2010}, language = {en} } @article{HoelscherSchrappe2010, author = {H{\"o}lscher, U and Schrappe, M}, title = {Patientensicherheit: Aufgaben der Medizintechnik im Krankenhaus}, series = {mt-Medizintechnik; ISSN 0344-9416}, volume = {01}, journal = {mt-Medizintechnik; ISSN 0344-9416}, pages = {3 -- 6}, year = {2010}, language = {de} } @incollection{HoelscherSchrappe2010, author = {H{\"o}lscher, U and Schrappe, M}, title = {Medizintechnik und Patientensicherheit}, series = {Agenda Patientensicherheit 2009; Aktionsb{\"u}ndnis Patientensicherheit}, booktitle = {Agenda Patientensicherheit 2009; Aktionsb{\"u}ndnis Patientensicherheit}, pages = {28 -- 33}, year = {2010}, language = {de} } @article{BrueggemannStierHoelscher2010, author = {Br{\"u}ggemann, M and Stier, A and H{\"o}lscher, U}, title = {Sicherer Zustand in Prozessleittechnik und Medizintechnik Safe State in Process Control Engineering and Medical Engineering}, series = {Biomedizinische Technik; ISSN 0013-5585}, volume = {55}, journal = {Biomedizinische Technik; ISSN 0013-5585}, year = {2010}, language = {en} } @article{WernerStephanStraussetal.2010, author = {Werner, Korb and Stephan, M and Strauß, G and Stier, A and H{\"o}lscher, U}, title = {Gebrauchstauglichkeit im Produktentwicklungsprozess - Ergebnisse einer Umfrage bei Medizinger{\"a}teherstellern}, series = {Biomedizinische Technik}, volume = {55}, journal = {Biomedizinische Technik}, issn = {0013-5585}, doi = {10.1515/BMT.2010.283}, year = {2010}, language = {de} } @article{HoelscherLiuGruchmannetal.2009, author = {H{\"o}lscher, U. and Liu, L. and Gruchmann, T. and Pantiskas, C.}, title = {Cross-National and Cross-Cultural Design of Medical Devices}, series = {AAMI HE 75}, journal = {AAMI HE 75}, year = {2009}, language = {en} } @incollection{Hoelscher2009, author = {H{\"o}lscher, U.}, title = {DIN EN 6060 1-1-6 und DIN EN 62366: Ergnonomie und Gebrauchstauglichkeit von Medizinprodukten}, series = {G{\"a}rtner, A [Hrsg.]: Medizinproduktesicherheit, Bd. 3, Normen in der Medizintechnik}, booktitle = {G{\"a}rtner, A [Hrsg.]: Medizinproduktesicherheit, Bd. 3, Normen in der Medizintechnik}, publisher = {T{\"U}V Media Gmbh}, address = {K{\"o}ln}, isbn = {978-3-8249-1004-5}, pages = {123 -- 138}, year = {2009}, language = {de} } @article{WieczoreckCrillyDixonetal.2009, author = {Wieczoreck, C. and Crilly, N. and Dixon, J. and H{\"o}lscher, U.}, title = {Design-phase-specific Selection of User Research Methods: Proceedings 43. Jahrestagung DGBMT}, series = {Biomedizinische Technik}, journal = {Biomedizinische Technik}, number = {54}, year = {2009}, language = {en} } @article{GrosseWentrupStierHoelscher2009, author = {Grosse-Wentrup, D. and Stier, A. and H{\"o}lscher, U.}, title = {Supporting Tool for Usability Specifications; Proceedings 43. Jahrestagung DGBMT 2009}, series = {Biomedizinische Technik}, journal = {Biomedizinische Technik}, number = {54}, year = {2009}, language = {en} } @article{VogtNahoussiFabinskietal.2009, author = {Vogt, J. and Nahoussi, A. and Fabinski, N. and Kappler, W. and Georgieff, J. and H{\"o}lscher, M.}, title = {Optimised NDIR technology for 13CO2 breath tests of i. e. drug/drug-interactions or gastric emptying for intensive care patients: New diagnostic opportunities; Proceedings 43. Jahrestagung DGBMT, 2009}, series = {Biomedizinische Technik}, journal = {Biomedizinische Technik}, number = {54}, year = {2009}, language = {en} }