@article{SchmiedeskampKloidtStocketal.1994, author = {Schmiedeskamp, Bernt and Kloidt, Andreas and Stock, Hans-J{\"u}rgen and Kleineberg, Ulf and D{\"o}hring, Thorsten and Pr{\"o}pper, Michael and Rahn, Steffen and Hilgers, Kerstin and Heidemann, Bernhard and Tappe, Thorsten and Heinzmann, Ulrich and Krumrey, Michael K. and M{\"u}ller, Peter and Scholze, Frank and Heidemann, Klaus F.}, title = {Electronbeam-deposited Mo/Si and MoxSiySi multilayer X-ray mirrors and gratings}, series = {Optical Engineering}, volume = {33}, journal = {Optical Engineering}, number = {4}, pages = {1314 -- 1321}, year = {1994}, subject = {R{\"o}ntgenspiegel}, language = {en} } @inproceedings{KloidtStockKleinebergetal.1993, author = {Kloidt, Andreas and Stock, Hans-J{\"u}rgen and Kleineberg, Ulf and D{\"o}hring, Thorsten and Pr{\"o}pper, Michael and Hilgers, Kerstin and Heidemann, Bernhard and Tappe, Thorsten and Schmiedeskamp, Bernt and Heinzmann, Ulrich}, title = {Preparation and microstructure analysis of Mo/Si multilayers as x-ray optical elements}, series = {Proceedings of Symposium on Surface Science 1993}, volume = {1993}, booktitle = {Proceedings of Symposium on Surface Science 1993}, pages = {115 -- 120}, year = {1993}, subject = {R{\"o}ntgenspiegel}, language = {en} } @inproceedings{KloidtStockKleinebergetal.1992, author = {Kloidt, Andreas and Stock, Hans-J{\"u}rgen and Kleineberg, Ulf and D{\"o}hring, Thorsten and Pr{\"o}pper, Michael and Nolting, Kerstin and Heidemann, Bernhard and Tappe, Thorsten and Schmiedeskamp, Bernt and Heinzmann, Ulrich and Krumrey, Michael K. and M{\"u}ller, Peter and Scholze, Frank and Rahn, Steffen and Heidemann, Klaus F.}, title = {Fabrication, thermal stability, and reflectivity measurements of Mo/Si multilayers as x-ray mirrors and other optical elements}, series = {Proceedings of SPIE}, volume = {1742}, booktitle = {Proceedings of SPIE}, pages = {593 -- 603}, year = {1992}, subject = {R{\"o}ntgenspiegel}, language = {en} } @incollection{SchmiedeskampDoehringHeidemannetal.1992, author = {Schmiedeskamp, Bernt and D{\"o}hring, Thorsten and Heidemann, Bernhard and Kleineberg, Ulf and Kloidt, Andreas and Nolting, Kerstin and Pr{\"o}pper, Michael and Stock, Hans-J{\"u}rgen and Tappe, Thorsten and Heinzmann, Ulrich}, title = {Verbundprojekt: Multischichten f{\"u}r optische Komponenten im weichen R{\"o}ntgengebiet}, series = {D{\"u}nnschichttechnologien `92}, booktitle = {D{\"u}nnschichttechnologien `92}, publisher = {VDI Verlag}, address = {D{\"u}sseldorf}, pages = {329 -- 336}, year = {1992}, subject = {D{\"u}nnschichttechnik}, language = {de} } @inproceedings{Doehring2013, author = {D{\"o}hring, Thorsten}, title = {The market of huge monolithic mirror substrates for optical astronomy}, series = {Proceedings of SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 883702}, booktitle = {Proceedings of SPIE 8837, Material Technologies and Applications to Optics, Structures, Components, and Sub-Systems, 883702}, number = {8837}, doi = {10.1117/12.2023652}, year = {2013}, subject = {Spiegelteleskop}, language = {en} } @inproceedings{DoehringZeising2013, author = {D{\"o}hring, Thorsten and Zeising, Sebastian}, title = {Spiegelsubstrate f{\"u}r professionelle astronomische Teleskope - ein {\"U}berblick}, series = {DGaO-Proceedings 2013}, booktitle = {DGaO-Proceedings 2013}, issn = {1614-8436}, year = {2013}, subject = {Spiegelteleskop}, language = {de} } @inproceedings{Doehring2014, author = {D{\"o}hring, Thorsten}, title = {Das Polieren professioneller Astronomiespiegel - Weltmarkt und Technologien}, series = {DGaO-Proceedings 2014}, booktitle = {DGaO-Proceedings 2014}, issn = {1614-8436}, year = {2014}, subject = {Polieren}, language = {de} } @inproceedings{Doehring2014, author = {D{\"o}hring, Thorsten}, title = {Polishers around the globe: an overview on the market of large astronomical mirrors}, series = {Proceedings of SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915110}, booktitle = {Proceedings of SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915110}, number = {9151}, doi = {10.1117/12.2055523}, year = {2014}, subject = {Polieren}, language = {en} } @inproceedings{ProserpioDoehringBreunigetal.2014, author = {Proserpio, Laura and D{\"o}hring, Thorsten and Breunig, Elias and Friedrich, Peter and Winter, Anita}, title = {Industrialization scenario for X-ray telescopes production based on glass slumping}, series = {Proceedings of SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 914448}, booktitle = {Proceedings of SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 914448}, number = {9144}, doi = {10.1117/12.2055129}, year = {2014}, subject = {R{\"o}ntgenteleskop}, language = {en} } @misc{DoehringStollenwerkProserpioetal.2015, author = {D{\"o}hring, Thorsten and Stollenwerk, Manfred and Proserpio, Laura and Winter, Anita}, title = {Transfer of astronomical mirror technologies - Project INTRAAST}, year = {2015}, abstract = {Poster}, subject = {Optisches Glas}, language = {en} } @inproceedings{Doehring2015, author = {D{\"o}hring, Thorsten}, title = {Abgehoben? Die Erstellung komplexer Angebote f{\"u}r Satellitenkomponenten}, series = {Tagungsband zum 2. HD-MINT-Symposium 2015}, volume = {2015}, booktitle = {Tagungsband zum 2. HD-MINT-Symposium 2015}, organization = {Hochschule Aschaffenburg}, issn = {1612-4537}, pages = {255 -- 255}, year = {2015}, abstract = {Im Studiengang „Internationales Technisches Vertriebsmanagement" der Hochschule Aschaffenburg werden Vertriebsingenieure f{\"u}r den internationalen Markt ausgebildet. Das {\"u}ber 7 Semester angelegte Bachelorstudium an der Fakult{\"a}t Ingenieurwissenschaften vermittelt den Studierenden technische Grundlagen, vertriebsorientierte betriebswirtschaftliche Kenntnisse, zwei Fremdsprachen sowie interkulturelle Kompetenzen. Ein laut Studienordnung verbindlich vorgeschriebener Auslandsaufenthalt rundet die Ausbildung ab. Im vierten Studiensemester findet die Lehrveranstaltung „Projektstudie" als seminaristischer Unterricht mit 4 SWS statt. Hierzu wird der Studienjahrgang in zwei Gruppen aufgeteilt, die von je einem Professor in der Durchf{\"u}hrung eines praxisnahen Vertriebsprojektes angeleitet werden. Die Veranstaltung baut auf Modulen vorheriger Semester auf. Die inhaltliche Thematik der Projektarbeiten basiert dabei auf der einschl{\"a}gigen Berufserfahrung der beiden Dozenten. Eine Gruppe erstellt im Wettbewerb Angebote f{\"u}r die Serienfertigung von Automobil-Kabels{\"a}tzen. Die andere Gruppe erarbeitet anhand von Original-Ausschreibungsunterlagen der Europ{\"a}ischen Raumfahrtbeh{\"o}rde konkurrierende Angebote f{\"u}r Satellitenkomponenten. Auf Letzteres wird im Folgenden detaillierter eingegangen. Zu Beginn des Semesters empfinden die Studierenden die Anforderungen des komplexen Angebotsprozesses f{\"u}r ein Satellitenexperiment als Praxisschock. Der komplette Satz der englischsprachigen Ausschreibungsunterlagen inklusive der zu ber{\"u}cksichtigenden Raumfahrtnormen umfasst {\"u}ber 1000 Textseiten, und die zu erstellenden Angebotsunterlagen f{\"u}llen {\"u}blicherweise zwei DIN A4-Ordner. Die Aufgabenteilung im Team relativiert den Arbeitsumfang jedoch erheblich. Am Semesterende {\"u}berwiegen positivere R{\"u}ckmeldungen und die Studierenden erkennen an, dass ein deutlicher Lernerfolg vorliegt. Aus Sicht der Dozenten ist diese Projektarbeit eine praxisnahe Vorbereitung auf die Berufsanforderungen eines Vertriebsingenieurs. Die hohe Qualit{\"a}t der erstellten Angebotsunterlagen zeigt, dass die angestrebten Lernziele erreicht wurden. Der Praxisschock einer komplexen Angebotserstellung erfolgt somit bereits im Studium unter Anleitung eines Professors und nicht erst w{\"a}hrend der Probezeit in einer ersten Vertriebsposition.}, subject = {Raumfahrt}, language = {de} } @inproceedings{DoehringStollenwerkGongetal.2015, author = {D{\"o}hring, Thorsten and Stollenwerk, Manfred and Gong, Qingqing and Proserpio, Laura and Winter, Anita and Friedrich, Peter}, title = {The challenge of developing thin mirror shells for future X-ray telescopes}, series = {Proceedings of SPIE}, volume = {2015}, booktitle = {Proceedings of SPIE}, number = {9628}, organization = {Hochschule Aschaffenburg}, pages = {962809-1 -- 962809-8}, year = {2015}, abstract = {Previously used mirror technologies are not able to fulfil the requirements of future X-ray telescopes due to challenging requests from the scientific community. Consequently new technical approaches for X-ray mirror production are under development. In Europe the technical baseline for the planned X-ray observatory ATHENA is the radical new approach of silicon pore optics. NASA´s recently launched NuSTAR mission uses segmented mirrors shells made from thin bended glasses, successfully demonstrating the feasibility of the glass forming technology for X-ray mirrors. For risk mitigation also in Europe the hot slumping of thin glasses is being developed as an alternative technology for lightweight X-ray telescopes. The high precision mirror manufacturing requires challenging technical developments; several design trades and trend-setting decisions need to be made and are discussed within this paper. Some new technical and economic aspects of the intended glass mirror serial production are also studied within the recently started interdisciplinary project INTRAAST, an acronym for "industry transfer of astronomical mirror technologies". The goal of the project, embedded in a cooperation of the Max-Planck-Institute for extraterrestrial Physics and the University of Applied Sciences Aschaffenburg, is to master the challenge of producing thin mirror shells for future X-ray telescopes. As a first project task the development of low stress coatings for thin glass mirror substrates have been started, the corresponding technical approach and first results are presented.}, subject = {Astronomie}, language = {en} } @inproceedings{WinterBreunigFriedrichetal.2015, author = {Winter, Anita and Breunig, Elias and Friedrich, Peter and Proserpio, Laura and D{\"o}hring, Thorsten}, title = {Indirect glass slumping for future X-ray missions: overview, status and progress}, series = {Proceedings of SPIE}, volume = {2015}, booktitle = {Proceedings of SPIE}, number = {9603}, organization = {Max-Planck-Institut f{\"u}r extraterrestrische Physik}, pages = {960308-1 -- 960308-8}, year = {2015}, abstract = {Future X-ray telescopes aim for large effective area within the given mass limits of the launcher. A promising method is the hot shaping of thin glass sheets via a thermal slumping process. This paper presents the status and progress of the indirect glass slumping technology developed at the Max-Planck-Institut for extraterrestrial Physics (MPE). Recent developments in our research include the use of the mould material Cesic under vacuum, as well as the fabrication of a high-precision slumping mould, which meets the requirements of large, high angular resolution missions like ATHENA. We describe the way forward to optimise the slumping process on these materials, the force-free integration concept and its progress, as well as the first test on reflective coating application.}, subject = {Astronomie}, language = {en} } @misc{SpeitDoehringWolff2014, author = {Speit, Burkard and D{\"o}hring, Thorsten and Wolff, Silke}, title = {Lead-containing space glass, its production and use}, year = {2014}, abstract = {The optical glasses have increased refractive indices and are useful for making space-saving and light-weight imaging optics with lenses of different glass types for use in different objects travelling in space. The optical glasses are suitable for production of optics having low total weight, which is decisive for space applications. These space glasses have high UV- and VIS-transmittance in a range of between 300 and 800 nm and high stability of transmittance over a period of years, because their aging has been greatly limited.}, subject = {Optisches Glas}, language = {en} } @misc{SpeitDoehringWolff2013, author = {Speit, Burkard and D{\"o}hring, Thorsten and Wolff, Silke}, title = {Lead-containing space glass, its production and use}, year = {2013}, abstract = {The space glass has a composition, in wt. \% based on oxide content, of: SiO2, 5-65; B2O3, 0-40; Al2O3, 0-12; PbO, 25-50; Na2O 0-8; K2O, 0-20; Sigma alkali metal oxides, at least 0.25; and at least 0.1 wt. \% of a total amount of three or more doping agents selected from CeO2, MoO3, Bi2O3, WO3, Ag2O, SnO2, Sb2O3 and As2O3. In addition, it contains one or more of the following doping agents in the following amounts: at most 1 wt. \%, CeO2; at most 0.02 wt. \%, As2O3; at most 0.3 wt. \%, Sb2O3; and at most 0.5 wt. \%, SnO2. Light-weight optical systems for space are made from it, because of its high radiation resistance. A preferred process for making space glass includes melting the oxide starting ingredients at 1050 DEG C. to 1200 DEG C. to form a melt and refining the melt at 1230 DEG C. to 1350 DEG C.}, subject = {Optisches Glas}, language = {en} } @misc{SpeitWolffDoehring2014, author = {Speit, Burkard and Wolff, Silke and D{\"o}hring, Thorsten}, title = {Verre spatial contenant du plomb, ses production et utilisation}, year = {2014}, abstract = {The optical glasses have increased refractive indices and are useful for making space-saving and light-weight imaging optics with lenses of different glass types for use in different objects travelling in space. The optical glasses are suitable for production of optics having low total weight, which is decisive for space applications. These space glasses have high UV- and VIS-transmittance in a range of between 300 and 800 nm and high stability of transmittance over a period of years, because their aging has been greatly limited.}, subject = {Optisches Glas}, language = {fr} } @misc{SpeitWolffDoehring2014, author = {Speit, Burkard and Wolff, Silke and D{\"o}hring, Thorsten}, title = {Lead-containing space glass, its production and use}, year = {2014}, abstract = {The space glasses have a composition, in wt. \% based on oxide content, including SiO2, 12-45; B2O3, 0-4; Al2O3, 0-4; TiO2, 0-5; PbO, 50-82; Na2O, 0-4; K2O, 0-8; and at least 0.1 wt. \% of a total amount of at least three doping agents selected from CeO2, MoO3, Bi2O3, WO3, Ag2O, SnO2, Sb2O3 and As2O3. Light-weight and space-saving optical systems for outer space applications can be made with these space glasses, which have high UV- and VIS-transmittance and high transmittance stability, because of their high radiation resistance based on their dopant content. A preferred process for making the space glass includes melting the above-stated oxide ingredients in a quartz crucible at 1050 DEG C. to 1200 DEG C. to form a melt and refining the melt at 1230 DEG C. to 1350 DEG C.}, subject = {Optisches Glas}, language = {en} } @misc{DoehringMitra2012, author = {D{\"o}hring, Thorsten and Mitra, Ina}, title = {OPTICAL COMPONENT}, year = {2012}, abstract = {To provide an optically uniform quality component which is a large size optical transparency component such as a lenz, prism, mirror or the like. ;SOLUTION: The optical component comprises an optical glass which comprises 35 to 70 wt.\% SiO2, 17 to 35 wt.\% Al2O3, 3 to 17 wt.\% P2O5, 0 to 6 wt.\% Li2O, 0.5 to 4 wt.\% MgO, 0.5 to 3 wt.\% ZnO, a maximum of 1 wt.\% CaO, a maximum of 0.5 wt.\% BaO, 0.5 to 6 wt.\% TiO2, 0.5 to 3 wt.\% ZrO2, 0 to 1 wt.\% Na2O, 0 to 1 wt.\% K2O, a maximum of 2 wt.\% of refining agents, and a maximum of 1 wt.\% of a coloring oxide and other impurities, and has at least 50 mm maximum thickness.}, subject = {Optisches Glas}, language = {en} } @misc{SchaeferDoehringSeibertetal.2013, author = {Sch{\"a}fer, Martin and D{\"o}hring, Thorsten and Seibert, Volker and Westerhoff, Thomas and Nowak, Hans-Joachim}, title = {SUBSTRATE FOR MIRROR SUPPORT WITH REDUCED WEIGHT AND MIRROR PROVIDED WITH MIRROR SUPPORT WITH REDUCED WEIGHT}, year = {2013}, abstract = {To provide a substrate for a mirror support, in which there still remains a high rigidity, despite a reduced weight. ;SOLUTION: In a substrate, particularly in a substrate for a mirror support, in which recesses are introduced in one surface, preferably in the back side of the substrate, as a result of which, in particular, bridging pieces are defined between the recesses, in order to achieve the situation in which despite a reduced weight, a high rigidity still remains, which means only a slight sagging after the correct take-in of the substrate in a holding device provided for it, at least one first position of the bridging pieces includes a width that is different from a second portion of the bridging pieces.}, subject = {Spiegeloptik}, language = {en} } @misc{SchaeferDoehringSeibertetal.2014, author = {Sch{\"a}fer, Martin and D{\"o}hring, Thorsten and Seibert, Volker and Westerhoff, Thomas and Nowak, Hans-Joachim}, title = {Substrate for a mirror support with reduced weight as well as mirror with reduced-weight mirror support}, year = {2014}, abstract = {Diesen Text {\"u}bersetzen Erste Seite Clipping von US8911098 (B2) In a substrate, particularly in a substrate for a mirror support, in which recesses are introduced in one surface, preferably in the back side of the substrate, as a result of which, in particular, bridging pieces are defined between the recesses, in order to achieve the situation that despite a reduced weight, a high rigidity still remains, which means only a slight sagging after its correct uptake in a holding device provided for it, it is provided that at least one first portion of the bridging pieces has a width that is different than a second portion of the bridging pieces.}, subject = {Spiegeloptik}, language = {en} } @misc{SchaeferDoehringSeibertetal.2015, author = {Sch{\"a}fer, Martin and D{\"o}hring, Thorsten and Seibert, Volker and Westerhoff, Thomas and Nowak, Hans-Joachim}, title = {Mirror supporting substratum for e.g. terrestrial observation, has spacers defined between one set of recesses and/ or two set of recesses, where part of one set of spacers has width different from width of part of other set of spacers}, year = {2015}, abstract = {The substratum (1) has two set of recesses (2, 3, 4, 7, 8) formed in a rear face (16), where the substratum is produced from a monolithic block of material including a lithium- aluminum- silicon type glass ceramic material. Set of spacers (5, 6, 9, 10) are defined between one set of recesses (2, 3, 4) and/ or the two set of recesses. A part of one set of spacers (5, 6) defined by the former recesses has width different from width of a part of other set of spacers (9, 10) defined by the latter recesses.}, subject = {Spiegeloptik}, language = {en} } @misc{SpeitWolffDoehring2015, author = {Speit, Burkard and Wolff, Silke and D{\"o}hring, Thorsten}, title = {Lead-containing space glass, its production and its use}, year = {2015}, abstract = {The invention relates to a lead-containing space glass, its production and its use. The optical glasses have increased refractive indices and are useful for making space-saving and light-weight imaging optics with lenses of different glass types for use in different objects travelling in space. The optical glasses are suitable for production of optics having low total weight, which is decisive for space applications. These space glasses have high UV- and VIS-transmittance in a range of between 300 and 800 nm and high stability of transmittance over a period of years, because their aging has been greatly limited.}, subject = {Optisches Glas}, language = {en} } @misc{SpeitWolffDoehring2015, author = {Speit, Burkard and Wolff, Silke and D{\"o}hring, Thorsten}, title = {Lead-containing space glass, its production and use}, year = {2015}, abstract = {The invention relates to a lead-containing space glass, its production and use. The optical glasses have increased refractive indices and are useful for making space-saving and light-weight imaging optics with lenses of different glass types for use in different objects travelling in space. The optical glasses are suitable for production of optics having low total weight, which is decisive for space applications. These space glasses have high UV- and VIS-transmittance in a range of between 300 and 800 nm and high stability of transmittance over a period of years, because their aging has been greatly limited.}, subject = {Optisches Glas}, language = {en} }