Dr. Ralph Hofferbert Profile

Dr. Ralph Hofferbert

at Max-Planck-Institut für Astronomie

SPIE Involvement:

Author

Publications (37)

Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

The MICADO first light imager for the ELT: proof of concept and performance testing of the relay optics alignment procedure

André Boné, Santiago Barboza, Robert Harris, Friedrich Müller, Benjamin Setterholm, Gabriele Rodeghiero, Paul Joseph, Jörg-Uwe Pott, Ralf-Rainer Rohloff, Ralph Hofferbert, Peter Bizenberger, José Ramos, Norbert Münch, Udo Neumann, Mike Hartl, Norbert Geiss, Christophe Dupuy, Ulf Seemann

Proceedings Volume 13096, 130965C (2024) https://doi.org/10.1117/12.3017954

KEYWORDS: Mirrors, Optical alignment, Tolerancing, Telescopes, Mirror mounts, Optics manufacturing, Alignment procedures, Relays, Manufacturing

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Proceedings Article | 18 July 2024 Presentation + Paper

Presentation + Paper

The MICADO first light imager for the ELT: overview and current status

E. Sturm, R. Davies, J. Alves, Y. Clénet, J. Kotilainen, A. Monna, H. Nicklas, J.-U. Pott, E. Tolstoy, B. Vulcani, J. Achren, S. Annadevara, H. Anwand-Heerwart, C. Arcidiacono, S. Barboza, L. Barl, P. Baudoz, R. Bender, N. Bezawada, F. Biondi, P. Bizenberger, A. Blin, A. Boné, P. Bonifacio, B. Borgo, J. van den Born, T. Buey, Y. Cao, F. Chapron, G. Chauvin, F. Chemla, K. Cloiseau, M. Cohen, C. Colin, O. Czoske, J.-O. Dette, M. Deysenroth, E. Dijkstra, S. Dreizler, O. Dupuis, G. van Egmond, F. Eisenhauer, E. Elswijk, A. Emslander, M. Fabricius, G. Fasola, F. Ferreira, N. Förster Schreiber, A. Fontana, J. Gaudemard, N. Gautherot, E. Gendron, C. Gennet, R. Genzel, L. Ghouchou, S. Gillessen, D. Gratadour, A. Grazian, F. Grupp, S. Guieu, M. Gullieuszik, M. de Haan, J. Hartke, M. Hartl, F. Haussmann, T. Helin, H.-J. Hess, R. Hofferbert, H. Huber, E. Huby, J.-M. Huet, D. Ives, A. Janssen, P. Jaufmann, T. Jilg, D. Jodlbauer, J. Jost, W. Kausch, H. Kellermann, F. Kerber, H. Kravcar, K. Kravchenko, C. Kulcsár, H. Kuncarayakti, P. Kunst, S. Kwast, F. Lang, J. Lange, V. Lapeyrere, B. Le Ruyet, K. Leschinski, H. Locatelli, D. Massari, S. Mattila, S. Mei, F. Merlin, E. Meyer, C. Michel, L. Mohr, M. Montargès, F. Müller, N. Münch, R. Navarro, U. Neumann, N. Neumayer, L. Neumeier, F. Pedichini, A. Pflüger, R. Piazzesi, L. Pinard, J. Porras, E. Portulari, N. Przybilla, S. Rabien, J. Raffard, R. Ragazzoni, R. Ramlau, J. Ramos, S. Ramsay, H.-F. Raynaud, P. Rhode, A. Richter, H.-W. Rix, M. Rodenhuis, R.-R. Rohloff, R. Romp, P. Rousselot, N. Sabha, B. Sassolas, J. Schlichter, M. Schuil, M. Schweitzer, U. Seemann, A. Sevin, M. Simioni, L. Spallek, A. Sönmez, J. Suuronen, S. Taburet, J. Thomas, E. Tisserand, P. Vaccari, E. Valenti, G. Verdoes Kleijn, M. Verdugo, F. Vidal, R. Wagner, M. Wegner, D. van Winden, J. Witschel, A. Zanella, W. Zeilinger, J. Ziegleder, B. Ziegler

Proceedings Volume 13096, 1309611 (2024) https://doi.org/10.1117/12.3017752

KEYWORDS: Imaging systems, James Webb Space Telescope, Imaging spectroscopy, Design and modelling, Adaptive optics, Stars, Manufacturing, Equipment, Wavefront sensors, Spectroscopes

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Proceedings Article | 18 July 2024 Paper

Paper

The MICADO first light imager for the ELT: starting manufacturing of the relay optics

Santiago Barboza, André Boné, Ralf-Rainer Rohloff, Friedrich Müller, Ralph Hofferbert, José Ramos, Jörg-Uwe Pott, Norbert Münch, Armin Böhn, Tobias Stadler, Tobias Maurer, Peter Bizenberger, David Serrano, Wolfram Schlossmacher, Helmut Espig, James Mulherin, Christopher Hall, Michael DeMarco

Proceedings Volume 13096, 130965E (2024) https://doi.org/10.1117/12.3018243

KEYWORDS: Mirrors, Manufacturing, Mirror mounts, Optics manufacturing, Carbon fiber reinforced plastics, Optical benches, Mirror surfaces, Design, Actuators, Deformation

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

The MICADO first light imager for the ELT: relay optics opto-mechanical final design

Santiago Barboza, André Boné, Gabriele Rodeghiero, Robert J. Harris, Joshua Jost, Jörg-Uwe Pott, Ralf-Rainer Rohloff, Friedrich Müller, Ralph Hofferbert, Peter Bizenberger, José Ramos, Norbert Münch, Lars Mohr, Paula Stępień, Wolfram Schlossmacher, Michael Müller

Proceedings Volume 12184, 121842Y (2022) https://doi.org/10.1117/12.2628895

KEYWORDS: Mirrors, Finite element methods, Mirror mounts, Optical benches, Optical alignment, Optical design, Relays, Computer aided design, Earthquakes

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Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

The MICADO first light imager for the ELT: a comprehensive tolerance analysis for the relay optics

André Boné, Santiago Barboza, Robert Harris, Gabriele Rodeghiero, Jörg-Uwe Pott, Ralf-Rainer Rohloff, Friedrich Müller, Ralph Hofferbert, Peter Bizenberger, José Ramos, Norbert Muench

Proceedings Volume 12184, 1218435 (2022) https://doi.org/10.1117/12.2629204

KEYWORDS: Tolerancing, Mirrors, Interfaces, Optical alignment, Geometrical optics, Diagnostics, Wavefronts

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

The MICADO first light imager for the ELT: relay optics opto-mechanical design

Santiago Barboza, Gabriele Rodeghiero, Robert Harris, José Ramos, Jörg-Uwe Pott, Ralf-Rainer Rohloff, Friedrich Müller, Ralph Hofferbert, Peter Bizenberger, Norbert Münch, Armin Böhm, Lars Mohr, Vianak Naranjo, Jörg Wagner, Wolfram Schlossmacher, Sebastian Rabien, Veronika Hörmann, Alejandro Farah

Proceedings Volume 11447, 114472D (2020) https://doi.org/10.1117/12.2559930

KEYWORDS: Relays, Optomechanical design, Imaging systems, Adaptive optics, Mirrors, Finite element methods, Cameras, Large telescopes, Imaging spectroscopy, Spectroscopes

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Preliminary design and performance verification of the MICADO Standalone Relay Optics

G. Rodeghiero, C. Cárdenas Vázquez, S. Barboza, R. J. Harris, P. Bizenberger, M. Hartl, N. Geis, J.-U. Pott, R. Hofferbert, J. R. Ramos, F. Müller, R.-R. Rohloff, U. Neumann, D. Kampf, S. Rabien, V. Hörmann, R. Davies, E. Gendron, M. Cohen, Y. Clénet

Proceedings Volume 11447, 1144734 (2020) https://doi.org/10.1117/12.2576162

KEYWORDS: Relays, Optical design, Mirrors, Interfaces, Tolerancing, Large telescopes, Channel projecting optics, Cameras, Adaptive optics, Vignetting

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Proceedings Article | 30 July 2018 Open Access

Open Access

Paper

The MICADO first light imager for the ELT: overview, operation, simulation

R. Davies, J. Alves, Y. Clénet, F. Lang-Bardl, H. Nicklas, J.-U. Pott, R. Ragazzoni, E. Tolstoy, P. Amico, H. Anwand-Heerwart, S. Barboza, L. Barl, P. Baudoz, R. Bender, N. Bezawada, P. Bizenberger, W. Boland, P. Bonifacio, B. Borgo, T. Buey, F. Chapron, F. Chemla, M. Cohen, O. Czoske, V. Déo, K. Disseau, S. Dreizler, O. Dupuis, M. Fabricius, R. Falomo, P. Fedou, N. Förster Schreiber, V. Garrel, N. Geis, H. Gemperlein, E. Gendron, R. Genzel, S. Gillessen, M. Glück, F. Grupp, M. Hartl, M. Häuser, H.-J. Hess, R. Hofferbert, U. Hopp, V. Hörmann, Z. Hubert, E. Huby, J.-M. Huet, V. Hutterer, D. Ives, A. Janssen, W. Jellema, W. Kausch, F. Kerber, H. Kravcar, B. Le Ruyet, K. Leschinski, C. Mandla, M. Manhart, D. Massari, S. Mei, F. Merlin, L. Mohr, A. Monna, N. Muench, F. Müller, G. Musters, R. Navarro, U. Neumann, N. Neumayer, J. Niebsch, M. Plattner, N. Przybilla, S. Rabien, R. Ramlau, J. Ramos, S. Ramsay, P. Rhode, A. Richter, J. Richter, H.-W. Rix, G. Rodeghiero, R.-R. Rohloff, M. Rosensteiner, G. Rousset, J. Schlichter, J. Schubert, A. Sevin, R. Stuik, E. Sturm, J. Thomas, N. Tromp, G. Verdoes-Kleijn, F. Vidal, R. Wagner, M. Wegner, W. Zeilinger, J. Ziegleder, B. Ziegler, G. Zins

Proceedings Volume 10702, 107021S (2018) https://doi.org/10.1117/12.2311483

KEYWORDS: Adaptive optics, Distortion, Planets

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Proceedings Article | 17 July 2018 Paper

Paper

The calibration procedure of the LINC-NIRVANA ground and high layer WFS

Carmelo Arcidiacono, Kalyan Kumar Santhakumari, Valentina Viotto, Maria Bergomi, Florian Briegel, Thomas Bertram, Luca Marafatto, Tom Herbst, Jacopo Farinato, Roberto Ragazzoni, Ralph Hofferbert, Martin Kürster, Frank Kittmann, Jürgen Berwein, Harald Baumeister

Proceedings Volume 10703, 107034R (2018) https://doi.org/10.1117/12.2313152

KEYWORDS: Calibration, Sensors, Stars, Actuators, Mirrors, Adaptive optics, Telescopes, Wavefront sensors, Deformable mirrors, Real-time computing

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Proceedings Article | 11 July 2018 Paper

Paper

The MICADO first light imager for ELT: derotator design status and prototype results

Santiago Barboza, Jörg-Uwe Pott, Ralf-Rainer Rohloff, Friedrich Müller, Ralph Hofferbert, Norbert Münch, Lars Mohr, José Ramos, Monica Ebert, Martin Glück, Jörg Wagner, Hans Kärcher, Wolfram Schlossmacher, Maximilian Häberle

Proceedings Volume 10702, 107028T (2018) https://doi.org/10.1117/12.2311683

KEYWORDS: Finite element methods, Interfaces, Mathematical modeling, Computer aided design, Prototyping, Manufacturing, Systems modeling

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Proceedings Article | 11 July 2018 Paper

Paper

The MICADO first light imager for the ELT: preliminary design of the MICADO Calibration Assembly

G. Rodeghiero, J.-U. Pott, N. Münch, R.-R. Rohloff, U. Grözinger, E. Biancalani, M. Sawczuck, M. Häberle, J. Moreno-Ventas, S. Schäfer, U. Seemann, V. Naranjo, S. Barboza, F. Müller, R. Hofferbert, J. Ramos, L. Mohr, M. C. Cárdenas Vázquez, P. Bizenberger, C. Pernechele, M. Ebert, M. Fabricius

Proceedings Volume 10702, 107028U (2018) https://doi.org/10.1117/12.2311721

KEYWORDS: Calibration, Lamps, Prototyping, Manufacturing, Light sources, Sensors, Mirrors, Imaging spectroscopy, Adaptive optics, Telescopes

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Proceedings Article | 2 September 2016 Paper

Paper

MCAO with LINC-NIRVANA at LBT: preparing for first light

T. Herbst, C. Arcidiacono, T. Bertram, P. Bizenberger, F. Briegel, R. Hofferbert, M. Kürster, R. Ragazzoni

Proceedings Volume 9909, 99092U (2016) https://doi.org/10.1117/12.2232596

KEYWORDS: Telescopes, Adaptive optics, Stars, Cameras, Mirrors, Turbulence, Wavefront sensors, Actuators, Deformable mirrors, Interferometry

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Proceedings Article | 19 August 2016 Paper

Paper

LINC-NIRVANA at LBT: final preparations for first light

T. Herbst, R. Ragazzoni, T. Bertram, P. Bizenberger, F. Briegel, R. Hofferbert, M. Kürster

Proceedings Volume 9908, 99080N (2016) https://doi.org/10.1117/12.2232707

KEYWORDS: Adaptive optics, Interferometry, Mirrors, Telescopes, Observatories, Optical alignment, Calibration, Wavefront sensors, Deformable mirrors, Sensors

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Proceedings Article | 9 August 2016 Open Access

Open Access

Paper

MICADO: first light imager for the E-ELT

R. Davies, J. Schubert, M. Hartl, J. Alves, Y. Clénet, F. Lang-Bardl, H. Nicklas, J.-U. Pott, R. Ragazzoni, E. Tolstoy, T. Agocs, H. Anwand-Heerwart, S. Barboza, P. Baudoz, R. Bender, P. Bizenberger, A. Boccaletti, W. Boland, P. Bonifacio, F. Briegel, T. Buey, F. Chapron, M. Cohen, O. Czoske, S. Dreizler, R. Falomo, P. Feautrier, N. Förster Schreiber, E. Gendron, R. Genzel, M. Glück, D. Gratadour, R. Greimel, F. Grupp, M. Häuser, M. Haug, J. Hennawi, H. J. Hess, V. Hörmann, R. Hofferbert, U. Hopp, Z. Hubert, D. Ives, W. Kausch, F. Kerber, H. Kravcar, K. Kuijken, M. Leitzinger, K. Leschinski, D. Massari, S. Mei, F. Merlin, L. Mohr, A. Monna, F. Müller, R. Navarro, M. Plattner, N. Przybilla, R. Ramlau, S. Ramsay, T. Ratzka, P. Rhode, J. Richter, H.-W. Rix, G. Rodeghiero, R.-R. Rohloff, G. Rousset, R. Ruddenklau, V. Schaffenroth, J. Schlichter, A. Sevin, R. Stuik, E. Sturm, J. Thomas, N. Tromp, M. Turatto, G. Verdoes-Kleijn, F. Vidal, R. Wagner, M. Wegner, W. Zeilinger, B. Ziegler, G. Zins

Proceedings Volume 9908, 99081Z (2016) https://doi.org/10.1117/12.2233047

KEYWORDS: Adaptive optics, Cameras, Adaptive optics, Cameras, Stars, Mirrors, Galactic astronomy, Imaging spectroscopy, Interfaces, Spectroscopy, Zoom lenses, Sensors

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Proceedings Article | 4 August 2016 Paper

Paper

An overview of the mid-infrared spectro-interferometer MATISSE: science, concept, and current status

A. Matter, B. Lopez, P. Antonelli, M. Lehmitz, F. Bettonvil, U. Beckmann, S. Lagarde, W. Jaffe, R. Petrov, P. Berio, F. Millour, S. Robbe-Dubois, A. Glindemann, P. Bristow, M. Schoeller, T. Lanz, T. Henning, G. Weigelt, M. Heininger, S. Morel, P. Cruzalebes, K. Meisenheimer, R. Hofferbert, S. Wolf, Y. Bresson, T. Agocs, F. Allouche, J.-C. Augereau, G. Avila, C. Bailet, J. Behrend, G. van Belle, J.-P. Berger, R. van Boekel, P. Bourget, R. Brast, J.-M. Clausse, C. Connot, R. Conzelmann, G. Csepany, W. Danchi, M. Delbo, C. Dominik, A. van Duin, E. Elswijk, Y. Fantei, G. Finger, A. Gabasch, F. Gonté, U. Graser, F. Guitton, S. Guniat, M. De Haan, P. Haguenauer, H. Hanenburg, K.-H. Hofmann, M. Hogerheijde, R. ter Horst, J. Hron, C Hummel, J. Isderda, D. Ives, G. Jakob, A. Jasko, P. Jolley, S. Kiraly, J. Kragt, T. Kroener, G. Kroes, S. Kuindersma, L. Labadie, W. Laun, C. Leinert, J.-L. Lizon, C. Lucuix, A. Marcotto, F. Martinache, G. Martinot-Lagarde, N. Mauclert, L. Mehrgan, A. Meilland, M. Mellein, S. Menardi, A. Merand, U. Neumann, E. Nussbaum, S. Ottogalli, R. Palsa, J. Panduro, E. Pantin, I. Percheron, T. Phan Duc, J.-U. Pott, E. Pozna, R. Roelfsema, G. Rupprecht, D. Schertl, C. Schmidt, M. Schuil, A. Spang, J. Stegmeier, N. Tromp, F. Vakili, M. Vannier, K. Wagner, L. Venema, J. Woillez

Proceedings Volume 9907, 99070A (2016) https://doi.org/10.1117/12.2233052

KEYWORDS: Mid-IR, Interferometry, Telescopes, Signal detection, Sensors, Stars, Spectral resolution, Fourier transforms, L band, Cameras

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Proceedings Article | 7 August 2014 Paper

Paper

Pathfinder first light: alignment, calibration, and commissioning of the LINC-NIRVANA ground-layer adaptive optics subsystem

Derek Kopon, Al Conrad, Carmelo Arcidiacono, Tom Herbst, Valentina Viotto, Jacopo Farinato, Maria Bergomi, Roberto Ragazzoni, Luca Marafatto, Harald Baumeister, Thomas Bertram, Jürgen Berwein, Florian Briegel, Ralph Hofferbert, Frank Kittmann, Martin Kürster, Lars Mohr, Kalyan Radhakrishnan

Proceedings Volume 9148, 914828 (2014) https://doi.org/10.1117/12.2056737

KEYWORDS: Stars, Adaptive optics, Mirrors, Telescopes, Optical alignment, Calibration, Cameras, Wavefront sensors, Infrared cameras, Space telescopes

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Proceedings Article | 6 August 2014 Paper

Paper

Acquiring multiple stars with the LINC-NIRVANA Pathfinder

Albert Conrad, Carmelo Arcidiacono, Harald Baumeister, Maria Bergomi, Thomas Bertram, Jürgen Berwein, Florian Briegel, Jacopo Farinato, Tom Herbst, Ralph Hofferbert, Frank Kittmann, Martin Kürster, Derek Kopon, Luca Marafatto, Mark Norris, Roberto Ragazzoni, Valentina Viotto

Proceedings Volume 9149, 91491O (2014) https://doi.org/10.1117/12.2055648

KEYWORDS: Stars, Cameras, Adaptive optics, Telescopes, Sensors, Visualization, Target acquisition, Prototyping, Human-machine interfaces, Wavefront sensors

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Proceedings Article | 21 July 2014 Paper

Paper

First light of the LINC-NIRVANA Pathfinder experiment

M. Bergomi, V. Viotto, C. Arcidiacono, L. Marafatto, J. Farinato, H. Baumeister, T. Bertram, J. Berwein, F. Briegel, A. Conrad, F. Kittman, D. Kopon, R. Hofferbert, D. Magrin, K. Radhakrishnan Santhakumari, A. Puglisi, M. Xompero, R. Briguglio, F. Quiros-Pacheco, T. Herbst, R. Ragazzoni

Proceedings Volume 9148, 91482Y (2014) https://doi.org/10.1117/12.2055533

KEYWORDS: Stars, Calibration, Cameras, Telescopes, Adaptive optics, Mirrors, Wavefront sensors, Matrices, Charge-coupled devices, Turbulence

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SPIE Journal Paper | 6 February 2013

LINC-NIRVANA for the large binocular telescope: setting up the world’s largest near infrared binoculars for astronomy

Ralph Hofferbert, Harald Baumeister, Thomas Bertram, Jürgen Berwein, Peter Bizenberger, Armin Böhm, Michael Böhm, José Luis Borelli, Matthieu Brangier, Florian Briegel, Albert Conrad, Fulvio De Bonis, Roman Follert, Thomas Herbst, Armin Huber, Frank Kittmann, Martin Kürster, Werner Laun, Ulrich Mall, Daniel Meschke, Lars Mohr, Vianak Naranjo, Aleksei Pavlov, Jorg-Uwe Pott, Hans-Walter Rix, Ralf-Rainer Rohloff, Eva Schinnerer, Clemens Storz, Jan Trowitzsch, Zhaojun Yan, Xianyu Zhang, Andreas Eckart, Matthew Horrobin, Steffen Rost, Christian Straubmeier, Imke Wank, Jens Zuther, Udo Beckmann, Claus Connot, Matthias Heininger, Karl-Heinz Hofmann, Tim Kroner, Edmund Nussbaum, Dieter Schertl, Gerd Weigelt, Maria Bergomi, Alessandro Brunelli, Marco Dima, Jacopo Farinato, Demetrio Magrin, Luca Marafatto, Roberto Ragazzoni, Valentina Viotto, Carmelo Arcidiacono, Giovanni Bregoli, Paolo Ciliegi, Giuseppe Cosentino, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Francesco D'Alessio, Gianluca Li Causi, Dario Lorenzetti, Fabrizio Vitali, Mario Bertero, Patrizia Boccacci, Andrea La Camera

OE, Vol. 52, Issue 08, 081602, (February 2013) https://doi.org/10.1117/12.10.1117/1.OE.52.8.081602

KEYWORDS: Telescopes, Sensors, Mirrors, Interferometry, Near infrared, Adaptive optics, Interfaces, Cameras, Optical engineering, Astronomy

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Proceedings Article | 24 October 2012 Paper

Paper

LINC-NIRVANA for the LBT: setting up the world's largest NIR binoculars for astronomy

Ralph Hofferbert, Harald Baumeister, Thomas Bertram, Jürgen Berwein, Peter Bizenberger, Armin Böhm, Michael Böhm, José Luis Borelli, Matthieu Brangier, Florian Briegel, Albert Conrad, Fulvio De Bonis, Roman Follert, Tom Herbst, Armin Huber, Frank Kittmann, Martin Kürster, Werner Laun, Ulrich Mall, Daniel Meschke, Lars Mohr, Vianak Naranjo, Aleksei Pavlov, Jörg-Uwe Pott, Hans-Walter Rix, Ralf-Rainer Rohloff, Eva Schinnerer, Clemens Storz, Jan Trowitzsch, Zhaojun Yan, Xianyu Zhang, Andreas Eckart, Matthew Horrobin, Steffen Rost, Christian Straubmeier, Imke Wank, Jens Zuther, Udo Beckmann, Claus Connot, Matthias Heininger, Karl-Heinz Hofmann, Tim Kröner, Eddy Nussbaum, Dieter Schertl, Gerd Weigelt, Maria Bergomi, Alessandro Brunelli, Marco Dima, Jacopo Farinato, Demetrio Magrin, Luca Marafatto, Roberto Ragazzoni, Valentina Viotto, Carmelo Arcidiacono, Giovanni Bregoli, Paolo Ciliegi, Guiseppe Cosentino, Emiliano Diolaiti, Italo Foppiani, Matteo Lombini, Laura Schreiber, Francesco D'Alessio, Gianluca Li Causi, Dario Lorenzetti, Fabrizio Vitali, Mario Bertero, Patrizia Boccacci, Andrea La Camera

Proceedings Volume 8511, 85110A (2012) https://doi.org/10.1117/12.928284

KEYWORDS: Telescopes, Mirrors, Sensors, Interferometry, Cameras, Adaptive optics, Near infrared, Stars, Imaging systems, Interfaces

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Proceedings Article | 13 September 2012 Paper

Paper

Aligning a more than 100 degrees of freedom wavefront sensor

Luca Marafatto, Maria Bergomi, Alessandro Brunelli, Marco Dima, Jacopo Farinato, Giancarlo Farisato, Luigi Lessio, Demetrio Magrin, Roberto Ragazzoni, Valentina Viotto, Thomas Bertram, Peter Bizenberger, Matthieu Brangier, Florian Briegel, Albert Conrad, Fulvio De Bonis, Tom Herbst, Ralph Hofferbert, Frank Kittmann, Martin Kürster, Daniel Meschke, Lars Mohr, Ralf-Rainer Rohloff

Proceedings Volume 8447, 84476F (2012) https://doi.org/10.1117/12.926773

KEYWORDS: Selenium, Charge-coupled devices, Mirrors, Stars, Sensors, Collimation, Superposition, Wavefront sensors, Beam splitters, Optical components

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Proceedings Article | 13 September 2012 Paper

Paper

LINC-NIRVANA Pathfinder: testing the next generation of wave front sensors at LBT

Albert Conrad, Carmelo Arcidiacono, Harald Baumeister, Maria Bergomi, Thomas Bertram, Juergen Berwein, Chris Biddick, Peter Bizenberger, Matthieu Brangier, Florian Briegel, Alessandro Brunelli, Joar Brynnel, Lorenzo Busoni, Norm Cushing, Fulvio De Bonis, Michele De La Pena, Simone Esposito, Jacopo Farinato, Luca Fini, Richard Green, Tom Herbst, Ralph Hofferbert, Frank Kittmann, Martin Kuerster, Werner Laun, Daniel Meschke, Lars Mohr, Aleksei Pavlov, Jorg-Uwe Pott, Alfio Puglisi, Roberto Ragazzoni, Andrew Rakich, Ralf-Rainer Rohloff, Jan Trowitzsch, Valentina Viotto, Xianyu Zhang

Proceedings Volume 8447, 84470V (2012) https://doi.org/10.1117/12.925650

KEYWORDS: Stars, Adaptive optics, Wavefronts, Calibration, Charge-coupled devices, Mirrors, Cameras, Infrared cameras, CCD cameras, Wavefront sensors

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Proceedings Article | 28 July 2010 Paper

Paper

The MCAO systems within LINC-NIRVANA: control aspects in addition to wavefront correction

T. Bertram, C. Arcidiacono, J. Berwein, P. Bizenberger, F. Briegel, E. Diolaiti, J. Farinato, W. Gässler, T. Herbst, R. Hofferbert, F. Kittmann, M. Kürster, R. Ragazzoni, L. Schreiber, J. Trowitzsch, V. Viotto

Proceedings Volume 7736, 77361S (2010) https://doi.org/10.1117/12.857097

KEYWORDS: Wavefronts, Control systems, Sensors, Wavefront sensors, Stars, Beam controllers, Mirrors, Cameras, Image sensors, Telescopes

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Proceedings Article | 20 July 2010 Paper

Paper

A compact light-weighted and multi-purpose calibration unit for LINC-NIRVANA

Fulvio De Bonis, Thomas Bertram, Lucas Labadie, Sebastian Egner, Peter Bizenberger, Ralph Hofferbert, Andreas Eckart, Martin Kuerster, Tom Herbst

Proceedings Volume 7735, 773543 (2010) https://doi.org/10.1117/12.857026

KEYWORDS: Mirrors, Calibration, Copper, Telescopes, Interferometry, Sensors, Kinematics, Integrating spheres, Optical benches, Composites

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Proceedings Article | 20 July 2010 Paper

Paper

High-precision cryogenic wheel mechanisms of the JWST/MIRI instrument: performance of the flight models

O. Krause, F. Müller, S. Birkmann, A. Böhm, M. Ebert, U. Grözinger, Th. Henning, R. Hofferbert, A. Huber, D. Lemke, R.-R. Rohloff, S. Scheithauer, T. Gross, T. Fischer, G. Luichtel, H. Merkle, M. Übele, H.-U. Wieland, J. Amiaux, R. Jager, A. Glauser, P. Parr-Burman, J. Sykes

Proceedings Volume 7739, 773918 (2010) https://doi.org/10.1117/12.856887

KEYWORDS: Interfaces, Kinematics, James Webb Space Telescope, Cryogenics, Position sensors, Performance modeling, Optical filters, Instrument modeling, Sensors, Magnetism

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Proceedings Article | 25 July 2008 Paper

Paper

Cryogenic wheel mechanisms for the Mid-Infrared Instrument (MIRI) of the James Webb Space Telescope (JWST): detailed design and test results from the qualification program

O. Krause, S. Birkmann, T. Blümchen, A. Böhm, M. Ebert, U. Grözinger, Th. Henning, R. Hofferbert, A. Huber, D. Lemke, R.-R. Rohloff, S. Scheithauer, T. Gross, G. Luichtel, C. Stein, R. Stott, M. Übele, J. Amiaux, J.-L. Auguères, A. Glauser, A. Zehnder, M. Meijers, R. Jager, P. Parr-Burrman, G. Wright

Proceedings Volume 7018, 701824 (2008) https://doi.org/10.1117/12.789319

KEYWORDS: Interfaces, James Webb Space Telescope, Kinematics, Cryogenics, Position sensors, Sensors, Mid-IR, Magnetism, Spectroscopy, Optical filters

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Proceedings Article | 12 July 2008 Paper

Paper

Development approach and first infrared test results of JWST/Mid Infra Red Imager Optical Bench

J. Amiaux, F. Alouadi, J. L. Augueres, P. Bouchet, M. Bouzat, C. Cavarroc, C. Cloue, P. De Antoni, D. Desforges, A. Donati, D. Dubreuil, D. Eppelle, F. Gougnaud, B. Hervieu, P. O. Lagage, D. Leboeuf, I. Le Mer, Y. Lussignol, P. Mattei, F. Meigner, V. Moreau, E. Pantin, P. Perrin, S. Ronayette, G. Tauzin, S. Poupar, D. Wright, A. Glasse, G. Wright, E. Mazy, J. Y. Plesseria, E. Renotte, T. Ray, A. Abergel, P. Guillard, Y. Longval, M. Ressler, J. M. Reess, R. Hofferbert, O. Krause, K. Justtanont, G. Olofsson

Proceedings Volume 7010, 70100U (2008) https://doi.org/10.1117/12.789027

KEYWORDS: Cryogenics, Mirrors, Inspection, Performance modeling, Point spread functions, Image quality, Optical testing, James Webb Space Telescope, Aerospace engineering, Imaging systems

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Proceedings Article | 10 July 2006 Paper

Paper

Cryogenic filter- and spectrometer wheels for the Mid Infrared Instrument (MIRI) of the James Webb Space Telescope (JWST)

D. Lemke, A. Böhm, F. de Bonis, M. Ebert, T. Gross, U. Grözinger, T. Henning, M. Hinz, R. Hofferbert, A. Huber, O. Krause, S. Kuhlmann, G. Luichtel, J. Ramos, R.-R. Rohloff, C. Stein, M. Trunz, M. Übele, K. Weidlich

Proceedings Volume 6273, 627324 (2006) https://doi.org/10.1117/12.671230

KEYWORDS: James Webb Space Telescope, Optical filters, Spectroscopy, Interfaces, Mid-IR, Kinematics, Cryogenics, Infrared spectroscopy, Imaging systems, Optical components

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Proceedings Article | 6 July 2006 Paper

Paper

The grating and filter wheels for the JWST NIRSpec instrument

K. Weidlich, M. Sedlacek, M. Fischer, M. Trunz, M. Ellenrieder, D. Lemke, O. Krause, R. Hofferbert, U. Grözinger, G. Königsreiter, C. Neugebauer

Proceedings Volume 6273, 627323 (2006) https://doi.org/10.1117/12.670692

KEYWORDS: Optical filters, Optical components, Prisms, Diffraction gratings, Cryogenics, Position sensors, Optical design, James Webb Space Telescope, Mirrors, Structural design

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Proceedings Article | 6 July 2006 Paper

Paper

The cold focal plane chopper of HERSCHEL's PACS instrument

Oliver Krause, Dietrich Lemke, Ralph Hofferbert, Armin Böhm, Ulrich Klaas, Josef Katzer, Frank Höller, Manfred Salvasohn

Proceedings Volume 6273, 627325 (2006) https://doi.org/10.1117/12.671271

KEYWORDS: Picture Archiving and Communication System, Mirrors, Prototyping, Manufacturing, Magnetism, Resistance, Position sensors, Actuators, Sensors, Calibration

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Proceedings Article | 29 August 2005 Paper

Paper

Lessons learnt and implemented: from ISO- to HERSCHEL- and JWST-instrumentation

D. Lemke, U. Groezinger, R. Hofferbert, U. Klaas, A. Boehm, R.-R. Rohloff

Proceedings Volume 5883, 588301 (2005) https://doi.org/10.1117/12.623876

KEYWORDS: Space telescopes, Picture Archiving and Communication System, Telescopes, Sensors, Infrared radiation, James Webb Space Telescope, Calibration, Optical filters, Spectroscopy, Infrared sensors

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Proceedings Article | 29 September 2004 Paper

Paper

Positioning of optical elements in the cryogenically cooled mid-infrared instrument MIRI for the James Webb Space Telescope

Dietrich Lemke, Ralph Hofferbert, Ulrich Grozinger, Ralf-Rainer Rohloff, Armin Bohm, Thomas Henning, Armin Huber, Stefan Mertin, Jose Ramos, Gillian Wright, Peter Hastings, Alex Zehnder, Sophie Salasca, Gabby Kroes, Christian Straubmeier, Andreas Eckart

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.550398

KEYWORDS: James Webb Space Telescope, Spectroscopy, Mirrors, Sensors, Electronics, Imaging systems, Optical components, Mid-IR, Optical filters, Picture Archiving and Communication System

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Proceedings Article | 29 September 2004 Paper

Paper

Prototyping of cryomechanisms for the JWST near-infrared spectrograph (NIRSpec)

Ralph Hofferbert, Dietrich Lemke, Armin Bohm, Ulrich Grozinger, Thomas Henning, Armin Huber, Oliver Krause, Stefan Mertin, Jose Ramos, Ralf-Rainer Rohloff, Georg Luichtel, Kai Weidlich, Gilles Baudin, Winfried Posselt, Ruben Nalbandian, Peter Jensen

Proceedings Volume 5495, (2004) https://doi.org/10.1117/12.550419

KEYWORDS: Mirrors, James Webb Space Telescope, Actuators, Prototyping, Optical filters, Space telescopes, Spectrographs, Linear filtering, Sensors, Astronomical imaging

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Proceedings Article | 10 November 2003 Paper

Paper

Cryomechanisms for the instruments MIRI and NIRSpec on the James Webb Space Telescope (JWST)

Ralph Hofferbert, Dietrich Lemke, Ulrich Groezinger, Thomas Henning, Stefan Mertin, Ralf-Rainer Rohloff, Karl Wagner, Gillian Wright, Huib Visser, Josef Katzer, M. Salvasohn, Winfried Posselt, Guy Fargant, Ruben Nalbandian

Proceedings Volume 5152, (2003) https://doi.org/10.1117/12.507420

KEYWORDS: Mirrors, James Webb Space Telescope, Actuators, Picture Archiving and Communication System, Optical components, Optical filters, Calibration, Electronics, Prisms, Spectrographs

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Proceedings Article | 5 March 2003 Paper

Paper

Cryomechanisms for positioning the optical components of the mid-infrared instrument (MIRI) for NGST

Dietrich Lemke, Ulrich Groezinger, Thomas Henning, Ralph Hofferbert, Ralf-Rainer Rohloff, Karl Wagner, Laurent Martin, Gabby Kroes, Gillian Wright

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461498

KEYWORDS: Mirrors, Calibration, Sensors, Optical components, Optical filters, Electronics, Infrared telescopes, Imaging systems, Prototyping, Space telescopes

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Proceedings Article | 18 December 2002 Paper

Paper

Qualification status of the stressed photoconductor arrays for the PACS instrument aboard Herschel

Hilmar Richter, Patrick Merken, Y. Creten, J. Putzeys, Chris Van Hoof, Reinhard Katterloher, Dirk Rosenthal, M. Rumitz, Ulrich Groezinger, Ralph Hofferbert, Jeffrey Beeman, Stefan Kraft

Proceedings Volume 4818, (2002) https://doi.org/10.1117/12.453906

KEYWORDS: Sensors, Photoresistors, Crystals, Quantum efficiency, Picture Archiving and Communication System, Electronics, Detector arrays, Manufacturing, Semiconducting wafers

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Proceedings Article | 12 December 2001 Paper

Paper

Qualification status of the stressed photoconductor arrays for the PACS instrument aboard Herschel

Stefan Kraft, Patrick Merken, Y. Creten, J. Putzeys, Chris Van Hoof, Reinhard Katterloher, Dirk Rosenthal, M. Rumitz, Ulrich Groezinger, Ralph Hofferbert, Jeffrey Beeman

Proceedings Volume 4540, (2001) https://doi.org/10.1117/12.450715

KEYWORDS: Sensors, Photoresistors, Quantum efficiency, Crystals, Picture Archiving and Communication System, Electronics, Detector arrays, Manufacturing, Semiconducting wafers

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Showing 5 of 37 publications

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