Dr. Andreas Seifahrt Profile

Dr. Andreas Seifahrt

Associate Director at Aura/NOIRLab

SPIE Involvement:

Author

Publications (26)

Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

MAROON-X: the first two years of EPRVs from Gemini North

Andreas Seifahrt, Jacob Bean, David Kasper, Julian Stürmer, Madison Brady, Robert Liu, Mathias Zechmeister, Gudmundur Stefánsson, Ben Montet, John White, Eduardo Tapia, Teo Mocnik, Siyi Xu, Christian Schwab

Proceedings Volume 12184, 121841G (2022) https://doi.org/10.1117/12.2629428

KEYWORDS: Fabry–Perot interferometers, Calibration, Gemini Observatory, Telescopes, Fiber science, Stars, Spectrographs, Planets, Sensors, Exoplanets, Exoplanetary science, Doppler effect

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Proceedings Article | 29 August 2022 Presentation

Presentation

G@M: Design of the Giant Magellan Telescope Consortium Large Earth Finder (G-CLEF) for operations at the Magellan telescopes.

Andrew Szentgyorgyi, Stuart McMuldroch, Sagi Ben-Ami, Kang-Min Kim, Chan Park, Daniel Baldwin, Stuart Barnes, Daniel Bednarski, Jacob Bean, Patricia Brennan, Baptiste Callendret, Daniel Catropa, Moo-Young Chun, Laird Close, Jeffrey Crane, Daniel Durusky, Jason Eastman, Harland Epps, Ian Evans, Janet DePonte Evans, Thomas Gauron, Vitor Hartmann, Ofir Hershko, Bi Ho Jang, Jeong-Gyun Jang, Ueejeong Jeong, Andres Jordan, Colby Jurgenson, Jan Kansky, Jihun Kim, Sanghyuk Kim, Yunjong Kim, Sungho Lee, Henrique Lupinari, Jared Males, Kenneth McCracken, Michael McQuade, Claudia Mendes de Oliveira, Rafael Millan-Gabet, Mark Mueller, Jae Sok Oh, Cem Onyuksel, Byeong-Gon Park, Sung-Joon Park, Priscila Pires, William Podgorski, Andreas Seifahrt, Matthew Smith, Joao Steiner, Alan Uomoto, Young-Sam Yu, Joseph Zajac, Rafael Brahm

Proceedings Volume 12184, 121841N (2022) https://doi.org/10.1117/12.2629045

KEYWORDS: Telescopes, Spectrographs, Exoplanets, Stars, Optical instrument design, Spectral resolution, Velocity measurements, Sun, Solar system, Oxygen

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Proceedings Article | 14 December 2020 Paper

Paper

On-sky commissioning of MAROON-X: a new precision radial velocity spectrograph for Gemini North

Andreas Seifahrt, Jacob Bean, Julian Stürmer, David Kasper, Luke Gers, Christian Schwab, Mathias Zechmeister, Guðmundur Stefánsson, Ben Montet, Leonardo Dos Santos, Alison Peck, John White, Eduardo Tapia

Proceedings Volume 11447, 114471F (2020) https://doi.org/10.1117/12.2561564

KEYWORDS: Spectrographs, Gemini Observatory, Telescopes, Fiber couplers, Velocity measurements, Micro optics, Exoplanets, Space operations, James Webb Space Telescope, Spectral resolution

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Keck Planet Finder: design updates

Steven Gibson, Andrew Howard, Kodi Rider, Arpita Roy, Jerry Edelstein, Marc Kassis, Jason Grillo, Sam Halverson, Martin Sirk, Christopher Smith, Steve Allen, Ashley Baker, Charles Beichman, Bruce Berriman, Thomas Brown, Kelleen Casey, Jason Chin, David Coutts, David Cowley, William Deich, Tobias Feger, Benjamin Fulton, Luke Gers, Yulia Gurevich, Yuzo Ishikawa, Ean James, Sharon Jelinsky, Stephen Kaye, Kyle Lanclos, Adela Li, Scott Lilley, Ben McCarney, Tim Miller, Steve Milner, Timothy O'Hanlon, Jacob Pember, Mike Raffanti, Constance Rockosi, Ryan Rubenzahl, Dave Rumph, Dale Sandford, Maureen Savage, Christian Schwab, Andreas Seifahrt, Abby Shaum, Roger Smith, Julian Stuermer, Jim Thorne, Adam Vandenberg, Tod Von Boeckmann, Cindy Wang, Qifan Wang, Marie Weisfeiler, Mavourneen Wilcox, Edward Wishnow, Peter Wizinowich, Truman Wold, Anna Wolfenberger

Proceedings Volume 11447, 1144742 (2020) https://doi.org/10.1117/12.2561783

KEYWORDS: Planets, Spectroscopy, Keck Observatory, Exoplanets, Doppler effect, Optical fabrication, Zerodur, Optical benches, Charge-coupled devices, CCD image sensors

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Proceedings Article | 3 January 2020 Paper

Paper

Rubidium transitions as wavelength reference for astronomical Doppler spectrographs

D. Rogozin, T. Feger, C. Schwab, Y. Gurevich, G. Raskin, D. Coutts, J. Stuermer, A. Seifahrt, T. Fuehrer, T. Legero, H. Van Winckel, S. Halverson, A. Quirrenbach

Proceedings Volume 11203, 112031N (2020) https://doi.org/10.1117/12.2541317

KEYWORDS: Rubidium, Fabry–Perot interferometers, Calibration, Astronomy, Spectrographs, Doppler effect, Spectroscopy, Absorption, Spectral calibration, Absorption spectroscopy

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Proceedings Article | 9 July 2018 Paper

Paper

Rubidium traced etalon wavelength calibrators: towards deployment at observatories

Christian Schwab, Tobias Feger, Julian Stürmer, Andreas Seifahrt, Yulia Gurevich, Dmytro Rogozin, Thorsten Führer, Samuel Halverson, Ryan Terrien, Thomas Legero, David Coutts, Gert Raskin, Thomas Walther, Jacob Bean, Andreas Quirrenbach

Proceedings Volume 10702, 1070272 (2018) https://doi.org/10.1117/12.2314426

KEYWORDS: Fabry–Perot interferometers, Rubidium, Calibration, Observatories, Spectroscopy, Spectrographs, Spectral calibration, Optical coatings

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Proceedings Article | 6 July 2018 Paper

Paper

MAROON-X: a radial velocity spectrograph for the Gemini Observatory

Andreas Seifahrt, Julian Stürmer, Jacob Bean, Christian Schwab

Proceedings Volume 10702, 107026D (2018) https://doi.org/10.1117/12.2312936

KEYWORDS: Cameras, Spectrographs, Calibration, Charge-coupled devices, Sensors, Telescopes, Gemini Observatory, Fabry–Perot interferometers, Prisms

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Proceedings Article | 6 July 2018 Paper

Paper

FIES fiber injection upgrade

Julian Stürmer, Andreas Seifahrt, Christian Schwab, Davide Gandolfi, Pilar Montañes-Rodriguez, Lars Buchhave

Proceedings Volume 10702, 107022S (2018) https://doi.org/10.1117/12.2313052

KEYWORDS: Telescopes, Spectrographs, Calibration, Near field optics, Connectors, Optical telescopes, Optical fibers

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Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

The GMT-consortium large earth finder (G-CLEF): an optical echelle spectrograph for the Giant Magellan Telescope (GMT)

Andrew Szentgyorgyi, Daniel Baldwin, Stuart Barnes, Jacob Bean, Sagi Ben-Ami, Patricia Brennan, Jamie Budynkiewicz, Daniel Catropa, Moo-Young Chun, Charlie Conroy, Adam Contos, Jeffrey Crane, Daniel Durusky, Harland Epps, Ian Evans, Janet Evans, Valery Fishman, Anna Frebel, Thomas Gauron, Dani Guzman, Tyson Hare, Bi-Ho Jang, Jeong-Gyun Jang, Andres Jordan, Jihun Kim, Kang-Min Kim, Yunjong Kim, Sungho Lee, Mercedes Lopez-Morales, Claudia Mendes de Oliveira, Kenneth McCracken, Stuart McMuldroch, Joseph Miller, Mark Mueller, Jae Sok Oh, Cem Onyuksel, Byeong-Gon Park, Chan Park, Sung-Joon Park, Charles Paxson, David Phillips, David Plummer, William Podgorski, Adam Rubin, Andreas Seifahrt, Daniel Stark, Joao Steiner, Alan Uomoto, Ronald Walsworth, Young-Sam Yu

Proceedings Volume 10702, 107021R (2018) https://doi.org/10.1117/12.2313539

KEYWORDS: Spectrographs, Cameras, Calibration, Telescopes, Stars, Optical benches, Thorium

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Proceedings Article | 6 July 2018 Paper

Paper

Keck Planet Finder: preliminary design

Steven Gibson, Andrew Howard, Arpita Roy, Christopher Smith, Sam Halverson, Jerry Edelstein, Marc Kassis, Edward Wishnow, Michael Raffanti, Steve Allen, Jason Chin, David Coutts, David Cowley, Jim Curtis, William Deich, Tobias Feger, Daniel Finstad, Yulia Gurevich, Yuzo Ishikawa, Ean James, Elisha Jhoti, Kyle Lanclos, Scott Lilley, Tim Miller, Steve Milner, Tom Payne, Kodi Rider, Constance Rockosi, Dale Sandford, Christian Schwab, Andreas Seifahrt, Martin Sirk, Roger Smith, Julian Stuermer, Marie Weisfeiler, Mavourneen Wilcox, Adam Vandenberg, Peter Wizinowich

Proceedings Volume 10702, 107025X (2018) https://doi.org/10.1117/12.2311565

KEYWORDS: Spectroscopy, Calibration, Planets, Zerodur, Doppler effect

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SPIE Journal Paper | 13 June 2017

Rubidium-traced white-light etalon calibrator for radial velocity measurements at the cm s⁻¹ level

Julian Stürmer, Andreas Seifahrt, Christian Schwab, Jacob Bean

JATIS, Vol. 3, Issue 02, 025003, (June 2017) https://doi.org/10.1117/12.10.1117/1.JATIS.3.2.025003

KEYWORDS: Fabry–Perot interferometers, Calibration, Spectrographs, Precision calibration, Rubidium, Spectral calibration, Fiber lasers, Laser stabilization, Single mode fibers, Zerodur

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Proceedings Article | 9 August 2016 Paper

Paper

The opto-mechanical design of the GMT-Consortium Large Earth Finder (G-CLEF)

Mark Mueller, Andrew Szentgyorgyi, Daniel Baldwin, Jacob Bean, Sagi Ben-Ami, Patricia Brennan, J. Budynkiewicz, Moo-Yung Chun, Jeffrey Crane, Harland Epps, Ian Evans, Janet Evans, Jeff Foster, Anna Frebel, Thomas Gauron, Alex Glenday, Tyson Hare, Bi-Ho Jang, Jeong-Gyun Jang, Andreas Jordan, Jihun Kim, Kang-Min Kim, Claudia Mendes de Oliveira, Mercedes Lopez-Morales, Kenneth McCracken, Stuart McMuldroch, Joseph Miller, Jae Sok Oh, Cem Onyuksel, Mark Ordway, Chan Park, Sung-Joon Park, Charles Paxson, David Phillips, David Plummer, William Podgorski, Andreas Seifahrt, Joao Steiner, Alan Uomoto, Ronald Walsworth, Young-Sam Yu

Proceedings Volume 9908, 9908A2 (2016) https://doi.org/10.1117/12.2233246

KEYWORDS: Spectrographs, Telescopes, Optical mounts, Space telescopes, Cameras, Calibration, Temperature metrology, Control systems, Mirrors, Optical benches

Read Abstract +

The GMT-Consortium Large Earth Finder (G-CLEF) is a fiber-fed, optical echelle spectrograph selected as the first light instrument for the Giant Magellan Telescope (GMT) now under construction at the Las Campanas Observatory in Chile. G-CLEF has been designed to be a general-purpose echelle spectrograph with precision radial velocity (PRV) capability for exoplanet detection. The radial velocity (RV) precision goal of G-CLEF is 10 cm/sec, necessary for detection of Earth-sized exoplanets. This goal imposes challenging stability requirements on the optical mounts and the overall spectrograph support structures especially when considering the instrument’s operational environment. The accuracy of G-CLEF’s PRV measurements will be influenced by minute changes in temperature and ambient air pressure as well as vibrations and micro gravity-vector variations caused by normal telescope slewing. For these reasons we have chosen to enclose G-CLEF’s spectrograph in a well-insulated, vibration isolated vacuum chamber in a gravity invariant location on GMT’s azimuth platform. Additional design constraints posed by the GMT telescope include: a limited space envelope, a thermal emission ceiling, and a maximum weight allowance. Other factors, such as manufacturability, serviceability, available technology and budget are also significant design drivers. All of the above considerations must be managed while ensuring performance requirements are achieved. In this paper, we discuss the design of G-CLEF’s optical mounts and support structures including the choice of a low coefficient of thermal expansion (CTE) carbon-fiber optical bench to minimize the system’s sensitivity to thermal soaks and gradients. We discuss design choices made to the vacuum chamber geared towards minimize the influence of daily ambient pressure variations on image motion during observation. We discuss the design of G-CLEF’s insulated enclosure and thermal control systems which will maintain the spectrograph at milli-Kelvin level stability while simultaneously limiting thermal emissions into the telescope dome. Also discussed are micro gravity-vector variations caused by normal telescope slewing, their uncorrected influence on image motion, and how they are dealt with in the design. Finally, we discuss G-CLEF’s front-end assembly and fiber-feed system as well as other interface challenges presented by the telescope, enclosure and neighboring instrumentation.

Proceedings Article | 9 August 2016 Paper

Paper

The GMT-Consortium Large Earth Finder (G-CLEF): an optical Echelle spectrograph for the Giant Magellan Telescope (GMT)

Andrew Szentgyorgyi, Daniel Baldwin, Stuart Barnes, Jacob Bean, Sagi Ben-Ami, Patricia Brennan, Jamie Budynkiewicz, Moo-Young Chun, Charlie Conroy, Jeffrey Crane, Harland Epps, Ian Evans, Janet Evans, Jeff Foster, Anna Frebel, Thomas Gauron, Dani Guzmán, Tyson Hare, Bi-Ho Jang, Jeong-Gyun Jang, Andres Jordan, Jihun Kim, Kang-Miin Kim, Claudia Mendes Mendes de Oliveira, Mercedes Lopez-Morales, Kenneth McCracken, Stuart McMuldroch, Joseph Miller, Mark Mueller, Jae Sok Oh, Cem Onyuksel, Mark Ordway, Byeong-Gon Park, Chan Park, Sung-Joon Park, Charles Paxson, David Phillips, David Plummer, William Podgorski, Andreas Seifahrt, Daniel Stark, Joao Steiner, Alan Uomoto, Ronald Walsworth, Young-Sam Yu

Proceedings Volume 9908, 990822 (2016) https://doi.org/10.1117/12.2233506

KEYWORDS: Spectrographs, Telescopes, Cameras, Calibration, Lamps, Interfaces, Fiber science, Light sources, Optical design, Mirrors

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Proceedings Article | 4 August 2016 Paper

Paper

Development and construction of MAROON-X

Andreas Seifahrt, Jacob Bean, Julian Stürmer, Luke Gers, Deon Grobler, Tony Reed, Damien Jones

Proceedings Volume 9908, 990818 (2016) https://doi.org/10.1117/12.2232069

KEYWORDS: Spectrographs, Fabry–Perot interferometers, Telescopes, Planets, Calibration, Cameras, Sensors, Electroluminescent displays, Stars, CCD image sensors

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Proceedings Article | 22 July 2016 Paper

Paper

Advanced structural design for precision radial velocity instruments

Dan Baldwin, Andrew Szentgyorgyi, Stuart Barnes, Jacob Bean, Sagi Ben-Ami, Patricia Brennan, Jamie Budynkiewicz, Moo-Young Chun, Charlie Conroy, Jeffrey Crane, Harland Epps, Ian Evans, Janet Evans, Jeff Foster, Anna Frebel, Thomas Gauron, Dani Guzman, Tyson Hare, Bi-Ho Jang, Jeong-Gyun Jang, Andres Jordan, Jihun Kim, Kang-Min Kim, Claudia Mendes de Oliveira, Mercedes Lopez-Morales, Kenneth McCracken, Stuart McMuldroch, Joseph Miller, Mark Mueller, Jae Sok Oh, Mark Ordway, Byeong-Gon Park, Chan Park, Sung-Joon Park, Charles Paxson, David Phillips, David Plummer, William Podgorski, Andreas Seifahrt, Daniel Stark, Joao Steiner, Alan Uomoto, Ronald Walsworth, Young-Sam Yu

Proceedings Volume 9912, 99123I (2016) https://doi.org/10.1117/12.2235250

KEYWORDS: Optical benches, Spectrographs, Optical design, Composites, Telescopes, Structural design, Finite element methods, Thermography, Sensors, Optical components

Read Abstract +

The GMT-Consortium Large Earth Finder (G-CLEF) is an echelle spectrograph with precision radial velocity (PRV) capability that will be a first light instrument for the Giant Magellan Telescope (GMT). G-CLEF has a PRV precision goal of 40 cm/sec (10 cm/s for multiple measurements) to enable detection of Earth-like exoplanets in the habitable zones of sun-like stars¹. This precision is a primary driver of G-CLEF’s structural design. Extreme stability is necessary to minimize image motions at the CCD detectors. Minute changes in temperature, pressure, and acceleration environments cause structural deformations, inducing image motions which degrade PRV precision. The instrument’s structural design will ensure that the PRV goal is achieved under the environments G-CLEF will be subjected to as installed on the GMT azimuth platform, including:

Millikelvin (0.001 °K) thermal soaks and gradients

10 millibar changes in ambient pressure

Changes in acceleration due to instrument tip/tilt and telescope slewing Carbon fiber/cyanate composite was selected for the optical bench structure in order to meet performance goals. Low coefficient of thermal expansion (CTE) and high stiffness-to-weight are key features of the composite optical bench design. Manufacturability and serviceability of the instrument are also drivers of the design.

In this paper, we discuss analyses leading to technical choices made to minimize G-CLEF’s sensitivity to changing environments. Finite element analysis (FEA) and image motion sensitivity studies were conducted to determine PRV performance under operational environments. We discuss the design of the optical bench structure to optimize stiffness-to-weight and minimize deformations due to inertial and pressure effects. We also discuss quasi-kinematic mounting of optical elements and assemblies, and optimization of these to ensure minimal image motion under thermal, pressure, and inertial loads expected during PRV observations.

Proceedings Article | 22 July 2016 Paper

Paper

Characterizing octagonal and rectangular fibers for MAROON-X

Adam Sutherland, Julian Stuermer, Katrina Miller, Andreas Seifahrt, Jacob Bean

Proceedings Volume 9912, 99125C (2016) https://doi.org/10.1117/12.2231707

KEYWORDS: Spectrographs, Cladding, Spectrographs, Telescopes, Seaborgium, Connectors, Neodymium, Speckle, Microscopes, Iris, CMOS cameras

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Proceedings Article | 22 July 2016 Paper

Paper

Optimal non-circular fiber geometries for image scrambling in high-resolution spectrographs

Julian Stürmer, Christian Schwab, Stephan Grimm, André Kalide, Adam Sutherland, Andreas Seifahrt, Kay Schuster, Jacob Bean, Andreas Quirrenbach

Proceedings Volume 9912, 99121T (2016) https://doi.org/10.1117/12.2234552

KEYWORDS: Spectrographs, Velocity measurements, Scattering, Speckle, Refractive index, Geometrical optics, Manufacturing, Electroluminescent displays, Cladding, Ray tracing

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Proceedings Article | 22 July 2016 Paper

Paper

A rubidium traced white-light etalon calibrator for MAROON-X

Julian Stürmer, Andreas Seifahrt, Christian Schwab, Jacob Bean

Proceedings Volume 9912, 991229 (2016) https://doi.org/10.1117/12.2232865

KEYWORDS: Fabry–Perot interferometers, Calibration, Rubidium, Spectrographs, Rubidium, Zerodur, Confocal microscopy, Precision calibration, Mirrors, Laser scanners, Space telescopes

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Proceedings Article | 22 July 2016 Paper

Paper

A microlens-array based pupil slicer and double scrambler for MAROON-X

Andreas Seifahrt, Julian Stürmer, Jacob Bean

Proceedings Volume 9912, 99121P (2016) https://doi.org/10.1117/12.2232118

KEYWORDS: Spectrographs, Telescopes, Prototyping, Collimators, Cladding, Neodymium, Microlens array, Coating, Tolerancing, Adhesives

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Proceedings Article | 28 July 2014 Paper

Paper

A preliminary design for the GMT-Consortium Large Earth Finder (G-CLEF)

Andrew Szentgyorgyi, Stuart Barnes, Jacob Bean, Bruce Bigelow, Antonin Bouchez, Moo-Young Chun, Jeffrey Crane, Harland Epps, Ian Evans, Janet Evans, Anna Frebel, Gabor Furesz, Alex Glenday, Dani Guzman, Tyson Hare, Bi-Ho Jang, Jeong-Gyun Jang, Ueejong Jeong, Andres Jordan, Kang-Min Kim, Jihun Kim, Chih-Hao Li, Mercedes Lopez-Morales, Kenneth McCracken, Brian McLeod, Mark Mueller, Jakyung Nah, Timothy Norton, Heeyoung Oh, Jae Sok Oh, Mark Ordway, Byeong-Gon Park, Chan Park, Sung-Joon Park, David Phillips, David Plummer, William Podgorski, Florian Rodler, Andreas Seifahrt, Kyung-Mo Tak, Alan Uomoto, Marcos Van Dam, Ronald Walsworth, Young Sam Yu, In-Soo Yuk

Proceedings Volume 9147, 914726 (2014) https://doi.org/10.1117/12.2056741

KEYWORDS: Spectrographs, Telescopes, Stars, Mirrors, Calibration, Exoplanets, Adaptive optics, Cameras, Interfaces, Optical design

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Proceedings Article | 8 July 2014 Paper

Paper

Near-infrared wavelength calibration of astrophysical spectrographs with the emission spectrum of the CN molecule

Andreas Boesch, Ansgar Reiners, Peter Bernath, Andreas Seifahrt

Proceedings Volume 9147, 914732 (2014) https://doi.org/10.1117/12.2053686

KEYWORDS: Lamps, Calibration, Microwave radiation, Molecules, Absorption, Fourier transforms, Spectrographs, Spectral calibration, Glasses, Nitrogen

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Proceedings Article | 5 October 2012 Paper

Paper

Preflight performance of the Echelon-Cross-Echelle spectrograph for SOFIA

Curtis DeWitt, Matthew Richter, Mark McKelvey, Andreas Seifahrt, Michael Case, Joseph Barthel, Peter Zell, Dana Lynch

Proceedings Volume 8446, 84461A (2012) https://doi.org/10.1117/12.925419

KEYWORDS: Sensors, Mirrors, Spectrographs, Liquids, Neodymium, Astronomy, Spectroscopes, Telescopes, Optical filters, Helium

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Proceedings Article | 21 July 2010 Paper

Paper

mCorrecting METIS spectra for telluric absorption to maximize spectral fidelity

Stefan Uttenthaler, Klaus Pontoppidan, Andreas Seifahrt, Sarah Kendrew, Joris A. D. Blommaert, Eric Pantin, Bernhard Brandl, Frank Molster, Lars Venema, Rainer Lenzen, Philip Parr-Burman, Ralf Siebenmorgen

Proceedings Volume 7735, 77357A (2010) https://doi.org/10.1117/12.856697

KEYWORDS: Absorption, Spectral resolution, Mid-IR, Spectrographs, Iterated function systems, Astronomy, Current controlled current source, Large telescopes, Imaging spectroscopy, Spectroscopes

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Proceedings Article | 21 July 2010 Paper

Paper

Status of the Echelon-cross-Echelle Spectrograph for SOFIA

Matthew Richter, Kimberly Ennico, Mark McKelvey, Andreas Seifahrt

Proceedings Volume 7735, 77356Q (2010) https://doi.org/10.1117/12.856515

KEYWORDS: Liquids, Mirrors, Sensors, Helium, Nitrogen, Spectral resolution, Telescopes, Cryogenics, Spectrographs, Human-machine interfaces

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Proceedings Article | 25 July 2008 Paper

Paper

CRIRES: commissioning and first science results

Hans Ulrich Käufl, Paola Amico, Pascal Ballester, Eduardo Bendek Selman, Paul Bristow, Mark Casali, Bernard Delabre, Danuta Dobrzycka, Reinhold Dorn, Raul Esteves, Gert Finger, Gordon Gillet, Domingo Gojak, Michael Hilker, Paul Jolley, Yves Jung, Florian Kerber, Barbara Klein, Jean-Louis Lizon, Jerome Paufique, Jean-Francois Pirard, Eszter Pozna, Hugues Sana, Lilian Sanzana, Ricardo Schmutzer, Andreas Seifahrt, Ralf Siebenmorgen, Alain Smette, Jörg Stegmeier, Lowell Tacconi-Garman, Stefan Uttenthaler, Elena Valenti, Ueli Weilenmann, Burkhard Wolff

Proceedings Volume 7014, 70140W (2008) https://doi.org/10.1117/12.787259

KEYWORDS: Calibration, Sensors, Infrared radiation, Spectrographs, Lamps, Telescopes, Observatories, Cryogenics, Adaptive optics, Spectral resolution

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Proceedings Article | 7 March 2003 Paper

Paper

The University of Hawaii Wide-Field Imager

Klaus-Werner Hodapp, Andrew Pickles, Gerard Luppino, Andreas Seifahrt, Richard Wainscoat

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.458044

KEYWORDS: Telescopes, Optical filters, Imaging systems, Camera shutters, Cameras, CCD cameras, Glasses, Optical instrument design, Optical design, Optics manufacturing

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Showing 5 of 26 publications

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