Dr. Stephen M. Kent Profile

Dr. Stephen M. Kent

at Fermi National Accelerator Lab

SPIE Involvement:

Author

Publications (35)

Proceedings Article | 26 August 2024 Poster + Paper

Small pitch tilting spine optical fiber positioners for massively parallel spectroscopy

Rebekah Sebok, Finian Ashmead, H. Thomas Diehl, Parth Gandhi, Jingqi Fan, Ayla Rodriguez, Kyler Kuehn, Marcelle Soares-Santos, Jennifer Marshall, Luke Schmidt, Theresa Shaw, Stephen Kent, Alex Drlica-Wagner

Proceedings Volume 13100, 131006A (2024) https://doi.org/10.1117/12.3018513

KEYWORDS: Spine, Optical fibers, Equipment, Carbon fibers, Spectroscopes, Polishing, Spectroscopy, Design, Optical fabrication, Cameras

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Proceedings Article | 29 August 2022 Presentation + Paper

The DESI instrument

K. Honscheid, K. Fanning, S. Bailey, R. Besuner, A. Dey, C. Dobson, A. Elliott, P. Fagrelius, J. Guy, J. Jimenez, S. Kent, D. Kirkby, M. Landriau, M. Levi, R. Marshall, P. Martini, A. Meisner, C. Poppett, D. Rabinowitz, E.rd Schafly, M. Schubnell, J. Silber, D. Sprayberry

Proceedings Volume 12184, 121840X (2022) https://doi.org/10.1117/12.2629736

KEYWORDS: Spectrographs, Cameras, Telescopes, Near infrared, Camera shutters, Charge-coupled devices, Robots, Stars, Galactic astronomy, Spectroscopes

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Proceedings Article | 13 December 2020 Poster + Paper

Performance of the Dark Energy Spectroscopic Instrument (DESI) focal plane

Parker Fagrelius, Yutong Duan, Kevin Fanning, Klaus Honscheid, Steven Kent, Paul Martini, Claire Poppett, David Rabinowitz, Michael Schubnell, Joseph Silber, David Brooks, Todd Claybaugh, Peter Doel, Enrique Gaztañaga, Michael Levi, Christophe Magneville, Francisco Prada, Greg Tarlé

Proceedings Volume 11447, 114478K (2020) https://doi.org/10.1117/12.2561631

KEYWORDS: Spectroscopes, Fiber optics, Robots, Baryon acoustic oscillations, Galactic astronomy, Telescopes, Spectrographs, Cameras, Optical alignment, Astronomy

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Proceedings Article | 10 July 2018 Presentation + Paper

Fabrication of the DESI corrector lenses

Timothy Miller, Robert Besuner, Michael Levi, Michael Lampton, Patrick Jelinsky, Henry Heetderks, David Schlegel, Jerry Edelstein, Peter Doel, David Brooks, Stephen Kent, Gary Poczulp, Michael Sholl

Proceedings Volume 10706, 107060X (2018) https://doi.org/10.1117/12.2312949

KEYWORDS: Lenses, Telescopes, Polishing, Glasses, Tolerancing, Astronomy, Silica, Optical design, Data modeling, Surface finishing

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Proceedings Article | 10 July 2018 Presentation + Paper

Broadband anti-reflection coating for the meter class Dark Energy Spectroscopic Instrument lenses

Charles Kennemore, Debi Archer, Russ Barbaria, Joe Bertolina, Rick Dix, Katy Dodson, Sharon Doi-Okray, Aaron Gallon, Bill Sweet, Timothy Miller, Robert Besuner, Michael Levi, Michael Lampton, Pat Jelinsky, Jerry Edelstein, David Schlegel, Jeremy McCauley, Henry Heetderks, Michael Sholl, Peter Doel, David Brooks, Stephen Kent

Proceedings Volume 10706, 107061S (2018) https://doi.org/10.1117/12.2313006

KEYWORDS: Coating, Lenses, Antireflective coatings, Spectroscopes, Astronomy, Computer aided design

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The Dark Energy Spectroscopic Instrument (DESI), currently under construction, will be used to measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra of 35 million galaxies and quasars over 14000 sq deg will be measured during the life of the experiment. A new prime focus corrector for the KPNO Mayall telescope will deliver light to 5000 fiber optic positioners. The fibers, in turn, feed ten broad-band spectrographs. We will describe the broadband AR coating (360 nm to 980nm) that was applied to the lenses of the camera system for DESI using ion assisted deposition techniques in a 3 m coating chamber. The camera has 6 lenses ranging in diameter from 0.8 m to 1.14 m, weighing from 84 kg to 237 kg and made from fused silica or BK7. The size and shape of the surfaces provided challenges in design, uniformity control, handling, tooling and process control. Single surface average transmission and minimum transmission met requirements. The varied optical surfaces and angle of incidence considerations meant the uniformity of the coating was of prime concern. The surface radius of curvature (ROC) for the 12 surfaces ranged from nearly flat to a ROC of 611 mm and a sag of 140 mm. One lens surface has an angle of incidence variation from normal incidence to 40°. Creating a design with a larger than required bandwidth to compensate for the non-uniformity and angle variation created the ability to reduce the required coating uniformity across the lens and a single design to be used for all common substrate surfaces. While a perfectly uniform coating is often the goal it is usually not practicable or cost effective for highly curved surfaces. The coating chamber geometry allowed multiple radial positions of the deposition sources as well as substrate height variability. Using these two variables we were able to avoid using any masking to achieve the uniformity required to meet radial and angle performance goals. Very broadband AR coatings usually have several very thin and optically important layers. The DESI coating design has layers approaching 3 nm in thickness. Having sensitive thin layers in the design meant controlling layer thickness and azimuthal variation were critical to manufacturing repeatability. Through use of strategically placed quartz crystal monitors combined with stable deposition plumes, the manufacturing variability was reduced to acceptable levels. Low deposition rates and higher rotation rates also provided some stability to azimuthal variation.

Proceedings Article | 10 July 2018 Presentation + Paper

Dark energy survey operations: years 4 and 5

H. T. Diehl, E. Neilsen, R. Gruendl, T. M. Abbott, S. Allam, O. Alvarez, J. Annis, E. Balbinot, S. Bhargava, K. Bechtol, G. Bernstein, R. Bhatawdekar, S. Bocquet, D. Brout, R. Capasso, R. Cawthon, C. Chang, E. Cook, C. Conselice, J. Cruz, C. D'Andrea, L. da Costa, R. Das, D. DePoy, A. Drlica-Wagner, A. Elliott, S. Everett, J. Frieman, A. Fausti Neto, A. Ferté, I. Friswell, K. Furnell, L. Gelman, D. Gerdes, M. S. Gill, D. Goldstein, D. Gruen, D. Gulledge, S. Hamilton, D. Hollowood, K. Honscheid, D. James, M. Johnson, M. W. Johnson, S. Kent, R. Kessler, G. Khullar, E. Kovacs, A. Kremin, R. Kron, N. Kuropatkin, J. Lasker, A. Lathrop, T. Li, M. Manera, M. March, J. Marshall, M. Medford, F. Menanteau, I. Mohammed, M. Monroy, B. Moraes, E. Morganson, J. Muir, M. Murphy, B. Nord, A. Pace, A. Palmese, Y. Park, F. Paz-Chinchón, M. E. Pereira, D. Petravick, A. Plazas, J. Poh, T. Prochaska, A. Romer, K. Reil, A. Roodman, M. Sako, M. Sauseda, D. Scolnic, L. Secco, I. Sevilla-Noarbe, N. Shipp, J. Smith, M Soares-Santos, B. Soergel, A. Stebbins, K. Story, K. Stringer, F. Tarsitano, B. Thomas, D. Tucker, K. Vivas, A. Walker, M.-Y. Wang, C. Weaverdyck, N. Weaverdyck, W. Wester, C. Wethers, R. Wilkenson, H.-Y Wu, B. Yanny, A. Zenteno, Y. Zhang

Proceedings Volume 10704, 107040D (2018) https://doi.org/10.1117/12.2312113

KEYWORDS: Telescopes, Cameras, Astronomy, Charge-coupled devices, Physics, Stars, Point spread functions, Galactic astronomy, Calibration, Control systems

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Proceedings Article | 6 July 2018 Presentation + Paper

The DESI instrument control systems: status and early testing

K. Honscheid, A. Elliott, E. Buckley-Geer, B. Abreshi, F. Castander, L. da Costa, S. Kent, D. Kirkby, R. Marshall, E. Neilsen, R. Ogando, D. Rabinowitz, A. Roodman, S. Serrano, D. Brooks, M. Levi, G. Tarle

Proceedings Volume 10707, 107071D (2018) https://doi.org/10.1117/12.2311927

KEYWORDS: Control systems, Spectrographs, Cameras, Telescopes, Databases, Imaging systems, Stars, Human-machine interfaces, Computing systems, Charge-coupled devices

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Proceedings Article | 6 July 2018 Presentation + Paper

Overview of the Dark Energy Spectroscopic Instrument

Paul Martini, Stephen Bailey, Robert Besuner, David Brooks, Peter Doel, Jerry Edelstein, Daniel Eisenstein, Brenna Flaugher, Gaston Gutierrez, Stewart Harris, Klaus Honscheid, Patrick Jelinsky, Richard Joyce, Stephen Kent, Michael Levi, Francisco Prada, Claire Poppett, David Rabinowitz, Constance Rockosi, Laia Cardiel Sas, David Schlegel, Michael Schubnell, Ray Sharples, Joseph Silber, David Sprayberry, Risa Wechsler

Proceedings Volume 10702, 107021F (2018) https://doi.org/10.1117/12.2313063

KEYWORDS: Spectrographs, Cameras, Telescopes, Imaging systems, Spectroscopes, Control systems, Camera shutters, Near infrared, Astronomy, Physics

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Proceedings Article | 9 August 2016 Paper

The alignment and assembly of the DESI prime focus corrector

David Brooks, Peter Doel, Robert Besuner, Brenna Flaugher, Giuseppe Gallo, Gaston Gutierrez, Stephen Kent, Michael Lampton, Michael Levi, Ming Liang, Timothy Miller, David Sprayberry, Andrew Stefanik

Proceedings Volume 9908, 99088C (2016) https://doi.org/10.1117/12.2232489

KEYWORDS: Optical alignment, Lenses, Baryon acoustic oscillations, Assembly tolerances, Optical alignment, Tolerancing, Silica, Cameras, Aluminum, Computer aided design, Astronomy

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Proceedings Article | 9 August 2016 Paper

The prime focus corrector for dark energy spectroscopic instrument

Peter Doel, Robert Besuner, David Brooks, Brenna Flaugher, Giuseppe Gallo, Gaston Gutierrez, Stephen Kent, Michael Lampton, Michael Levi, Ming Liang, Timothy Miller, David Sprayberry

Proceedings Volume 9908, 99088D (2016) https://doi.org/10.1117/12.2232493

KEYWORDS: Spectroscopes, Spectrographs, Telescopes, Baryon acoustic oscillations, Lenses, Computer aided design, Silica, Polishing, Astronomy, Observatories

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Proceedings Article | 9 August 2016 Paper

Impact of optical distortions on fiber positioning in the dark energy spectroscopic instrument

Stephen Kent, Michael Lampton, A. Peter Doel, David Brooks, Tim Miller, Robert Besuner, Joe Silber, Ming Liang, David Sprayberry, Charles Baltay, David Rabinowitz

Proceedings Volume 9908, 99088F (2016) https://doi.org/10.1117/12.2232689

KEYWORDS: Cameras, Spectroscopes, Telescopes, Back illuminated sensors, Lenses, Charge-coupled devices, Astronomy, Polishing, Imaging systems, CCD cameras

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Proceedings Article | 9 August 2016 Paper

ProtoDESI: risk reduction experiment for the Dark Energy Spectroscopic Instrument

Parker Fagrelius, Charles Baltay, Christopher Bebek, Robert Besuner, Francisco Castander, Arjun Dey, Elizabeth Buckley-Geer, Ann Elliott, William Emmet, Brenna Flaugher, Irena Gershkovich, Klaus Honscheid, Dick Joyce, Stephen Kent, Robert Marshall, Ronald Probst, David Rabinowitz, Kevin Reil, David Schlegel, Michael Schubnell, Santiago Serrano, Joseph Silber, David Sprayberry, Greg Tarle

Proceedings Volume 9908, 99087X (2016) https://doi.org/10.1117/12.2231760

KEYWORDS: Galactic astronomy, Telescopes, Control systems, Spectroscopes, Cameras, Stars, Robotics, Light emitting diodes, Photometry, Astronomy

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The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra of 40 million galaxies over 14,000 sq. deg. will be measured during the life of the experiment. A new prime focus corrector for the KPNO Mayall telescope will deliver light to 5000 fiber optic positioners. The fibers in turn feed ten broad-band spectrographs. We describe the ProtoDESI experiment, planned for installation and commissioning at the Mayall telescope in the fall of 2016, which will test the fiber positioning system for DESI. The ProtoDESI focal plate, consisting of 10 fiber positioners, illuminated fiducials, and a guide, focus and alignment (GFA) sensor module, will be installed behind the existing Mosaic prime focus corrector. A Fiber View Camera (FVC) will be mounted to the lower surface of the primary mirror cell and a subset of the Instrument Control System (ICS) will control the ProtoDESI subsystems, communicate with the Telescope Control System (TCS), and collect instrument monitoring data. Short optical fibers from the positioners will be routed to the back of the focal plane where they will be imaged by the Fiber Photometry Camera (FPC) or back-illuminated by a LED system. Target objects will be identified relative to guide stars, and using the GFA in a control loop with the ICS/TCS system, the guide stars will remain stable on pre-identified GFA pixels. The fiber positioners will then be commanded to the target locations and placed on the targets iteratively, using the FVC to centroid on back-illuminated fibers and fiducials to make corrective delta motions. When the positioners are aligned with the targets on-sky, the FPC will measure the intensities from the positioners’ fibers which can then be dithered to look for intensity changes, indicating how well the fibers were initially positioned on target centers. The final goal is to operate ProtoDESI on the Mayall telescope for a 6-hour period during one night, successfully placing targets on the intended fibers for the duration of a typical DESI science exposure.

Proceedings Article | 8 August 2016 Paper

The DESI instrument control system

K. Honscheid, A. Elliott, L. Beaufore, E. Buckley-Geer, F. Castander, L. daCosta, A. Fausti, S. Kent, D. Kirkby, E. Neilsen, K. Reil, S. Serrano, A. Slozar

Proceedings Volume 9913, 99130P (2016) https://doi.org/10.1117/12.2229835

KEYWORDS: Spectrographs, Telescopes, Control systems, Databases, Cameras, Stars, Charge-coupled devices, Imaging systems, Image analysis, Image processing

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Proceedings Article | 15 July 2016 Paper

The dark energy survey and operations: years 1 to 3

H. T. Diehl, E. Neilsen, R. Gruendl, B. Yanny, T. M. Abbott, J. Aleksić, S. Allam, J. Annis, E. Balbinot, M. Baumer, L. Beaufore, K. Bechtol, G. Bernstein, S. Birrer, C. Bonnett, D. Brout, C. Bruderer, E. Buckley-Geer, D. Capozzi, A. Carnero Rosell, F. Castander, R. Cawthon, C. Chang, L. Clerkin, R. Covarrubias, C. Cuhna, C. D'Andrea, L. da Costa, R. Das, C. Davis, J. Dietrich, A. Drlica-Wagner, A. Elliott, T. Eifler, J. Etherington, B. Flaugher, J. Frieman, A. Fausti Neto, M. Fernández, C. Furlanetto, D. Gangkofner, D. Gerdes, D. Goldstein, K. Grabowski, R. Gupta, S. Hamilton, H. Head, J. Helsby, D. Hollowood, K. Honscheid, D. James, M. Johnson, S. Jouvel, T. Kacprzac, S. Kent, R. Kessler, A. Kim, E. Krause, C. Krawiec, A. Kremin, R. Kron, S. Kuhlmann, N. Kuropatkin, O. Lahav, J. Lasker, T. Li, E. Luque, N. Maccrann, M. March, J. Marshall, N. Mondrik, E. Morganson, D. Mudd, A. Nadolski, P. Nugent, P. Melchior, F. Menanteau, D. Nagasawa, B. Nord, R. Ogando, L. Old, A. Palmese, D. Petravick, A. Plazas, A. Pujol, A. Queiroz, K. Reil, A. Romer, R. Rosenfeld, A. Roodman, P. Rooney, M. Sako, A. Salvador, C. Sánchez, E. Sánchez Álvaro, B. Santiago, A. Schooneveld, M. Schubnell, E. Sheldon, A. Smith, R. Smith, M. Soares-Santos, F. Sobreira, M. Soumagnac, H. Spinka, S. Tie, D. Tucker, V. Vikram, K. Vivas, A. Walker, W. Wester, M. Wiesner, H. Wilcox, P. Williams, A. Zenteno, Y. Zhang, Z. Zhang

Proceedings Volume 9910, 99101D (2016) https://doi.org/10.1117/12.2233157

KEYWORDS: Cameras, Telescopes, Physics, Astronomy, Charge-coupled devices, Point spread functions, Mirrors, Stars, Image quality, Optical filters

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Proceedings Article | 6 August 2014 Paper

The Dark Energy Survey and operations: Year 1

H. Diehl, T. M. Abbott, J. Annis, R. Armstrong, L. Baruah, A. Bermeo, G. Bernstein, E. Beynon, C. Bruderer, E. Buckley-Geer, H. Campbell, D. Capozzi, M. Carter, R. Casas, L. Clerkin, R. Covarrubias, C. Cuhna, C. D'Andrea, L. da Costa, R. Das, D. DePoy, J. Dietrich, A. Drlica-Wagner, A. Elliott, T. Eifler, J. Estrada, J. Etherington, B. Flaugher, J. Frieman, A. Fausti Neto, M. Gelman, D. Gerdes, D. Gruen, R. Gruendl, J. Hao, H. Head, J. Helsby, K. Hoffman, K. Honscheid, D. James, M. Johnson, T. Kacprzac, J. Katsaros, R. Kennedy, S. Kent, R. Kessler, A. Kim, E. Krause, R. Kron, S. Kuhlmann, A. Kunder, T. Li, H. Lin, N. Maccrann, M. March, J. Marshall, E. Neilsen, P. Nugent, P. Martini, P. Melchior, F. Menanteau, R. Nichol, B. Nord, R. Ogando, L. Old, A. Papadopoulos, K. Patton, D. Petravick, A. Plazas, R. Poulton, A. Pujol, K. Reil, T. Rigby, A. Romer, A. Roodman, P. Rooney, E. Sanchez Alvaro, S. Serrano, E. Sheldon, A. Smith, R. Smith, M. Soares-Santos, M. Soumagnac, H. Spinka, E. Suchyta, D. Tucker, A. Walker, W. Wester, M. Wiesner, H. Wilcox, R. Williams, B. Yanny, Y. Zhang

Proceedings Volume 9149, 91490V (2014) https://doi.org/10.1117/12.2056982

KEYWORDS: Telescopes, Cameras, Physics, Mirrors, Astronomy, Image quality, Charge-coupled devices, Control systems, Observatories, Imaging systems

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Proceedings Article | 6 August 2014 Paper

The DESI wide field corrector optics

Peter Doel, Michael Sholl, Ming Liang, David Brooks, Brenna Flaugher, Gaston Gutierrez, Stephen Kent, Michael Lampton, Timothy Miller, David Sprayberry

Proceedings Volume 9147, 91476R (2014) https://doi.org/10.1117/12.2057172

KEYWORDS: Telescopes, Silica, Aspheric lenses, Astronomical imaging, Galactic astronomy, Optical design, Tolerancing, Astronomy, Spectroscopy, Astronomical telescopes

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Proceedings Article | 18 July 2014 Paper

Prime focus wide-field corrector designs with lossless atmospheric dispersion correction

Will Saunders, Peter Gillingham, Greg Smith, Steve Kent, Peter Doel

Proceedings Volume 9151, 91511M (2014) https://doi.org/10.1117/12.2055662

KEYWORDS: Lenses, Telescopes, Spectroscopy, Distortion, Atmospheric corrections, Imaging spectroscopy, Optical instrument design, Actuators, Aspheric lenses, Image quality

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Proceedings Article | 24 September 2012 Paper

The Dark Energy Spectrometer: a potential multi-fiber instrument for the Blanco 4-meter Telescope

J. Marshall, Stephen Kent, H. Thomas Diehl, Brenna Flaugher, Joshua Frieman, Richard Kron, D. DePoy, Matthew Colless, Will Saunders, Greg Smith, Ofer Lahav, Filipe Abdalla, David Brooks, Peter Doel, Donnacha Kirk, James Annis, Huan Lin, John Marriner, Stephanie Jouvel, Michael Seiffert

Proceedings Volume 8446, 844656 (2012) https://doi.org/10.1117/12.926451

KEYWORDS: Spectrographs, Telescopes, Cameras, Spectroscopy, Spectral resolution, Charge-coupled devices, Optical fibers, Galactic astronomy, CCD cameras, Optical instrument design

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Proceedings Article | 24 September 2012 Paper

Assembly, alignment, and testing of the DECam wide field corrector optics

Peter Doel, David Brooks, Michelle Antonik, Brenna Flaugher, Andrew Stefanik, Stephen Kent, Gaston Gutierrez, Herman Cease, Timothy Abbott, Alistair Walker, Darren DePoy, Rebecca Bernstein, Sue Worswick

Proceedings Volume 8446, 84466F (2012) https://doi.org/10.1117/12.926590

KEYWORDS: Lenses, Cameras, Optical alignment, Tolerancing, Glasses, Imaging systems, Optical fabrication, Laser systems engineering, Observatories, Telescopes

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Proceedings Article | 24 September 2012 Paper

Status of the Dark Energy Survey Camera (DECam) project

Brenna Flaugher, Timothy Abbott, Robert Angstadt, Jim Annis, Michelle Antonik, Jim Bailey, Otger Ballester, Joseph Bernstein, Rebecca Bernstein, Marco Bonati, Gale Bremer, Jorge Briones, David Brooks, Elizabeth Buckley-Geer, Juila Campa, Laia Cardiel-Sas, Francisco Castander, Javier Castilla, Herman Cease, Steve Chappa, Edward Chi, Luis da Costa, Darren DePoy, Gregory Derylo, Juan de Vincente, H. Thomas Diehl, Peter Doel, Juan Estrada, Jacob Eiting, Anne Elliott, David Finley, Rolando Flores, Josh Frieman, Enrique Gaztanaga, David Gerdes, Mike Gladders, V. Guarino, G. Gutierrez, Jim Grudzinski, Bill Hanlon, Jiangang Hao, Steve Holland, Klaus Honscheid, Dave Huffman, Cheryl Jackson, Michelle Jonas, Inga Karliner, Daekwang Kau, Steve Kent, Mark Kozlovsky, Kurt Krempetz, John Krider, Donna Kubik, Kyler Kuehn, Steve Kuhlmann, Kevin Kuk, Ofer Lahav, Nick Langellier, Andrew Lathrop, Peter Lewis, Huan Lin, Wolfgang Lorenzon, Gustavo Martinez, Timothy McKay, Wyatt Merritt, Mark Meyer, Ramon Miquel, Jim Morgan, Peter Moore, Todd Moore, Eric Neilsen, Brian Nord, Ricardo Ogando, Jamieson Olson, Kenneth Patton, John Peoples, Andres Plazas, Tao Qian, Natalie Roe, Aaron Roodman, B. Rossetto, E. Sanchez, Marcelle Soares-Santos, Vic Scarpine, Terry Schalk, Rafe Schindler, Ricardo Schmidt, Richard Schmitt, Mike Schubnell, Kenneth Schultz, M. Selen, Santiago Serrano, Terri Shaw, Vaidas Simaitis, Jean Slaughter, R. Christopher Smith, Hal Spinka, Andy Stefanik, Walter Stuermer, Adam Sypniewski, R. Talaga, Greg Tarle, Jon Thaler, Doug Tucker, Alistair Walker, Curtis Weaverdyck, William Wester, Robert Woods, Sue Worswick, Allen Zhao

Proceedings Volume 8446, 844611 (2012) https://doi.org/10.1117/12.926216

KEYWORDS: Charge-coupled devices, Telescopes, Imaging systems, Safety, Lenses, Cameras, CCD cameras, Optical filters, Device simulation, Diffractive optical elements

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Proceedings Article | 11 August 2010 Paper

The ring of fire: an internal illumination system for detector sensitivity and filter bandpass characterization

Victor Scarpine, Stephen Kent, Susana Deustua, Michael Sholl, Stuart Mufson, Melanie Ott, Matthew Wiesner, Brian Baptista

Proceedings Volume 7731, 77313E (2010) https://doi.org/10.1117/12.857695

KEYWORDS: Radio over Fiber, Sensors, Calibration, Space telescopes, Telescopes, Mirrors, Photodiodes, Bandpass filters, Astronomy, Light

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Proceedings Article | 15 July 2010 Paper

Status of the dark energy survey camera (DECam) project

Brenna Flaugher, Timothy M. Abbott, Jim Annis, Michelle Antonik, Jim Bailey, Otger Ballester, Joseph Bernstein, Rebecca Bernstein, Marco Bonati, Gale Bremer, Jorge Briones, David Brooks, Elizabeth Buckley-Geer, Julia Campa, Laia Cardiel-Sas, Francisco Castander, Javier Castilla, Herman Cease, Steve Chappa, Edward Chi, Luis da Costa, Darren DePoy, Gregory Derylo, Juan De Vicente, H. Thomas Diehl, Peter Doel, Juan Estrada, Jacob Eiting, Anne Elliott, David Finley, Josh Frieman, Enrique Gaztanaga, David Gerdes, Mike Gladders, V. Guarino, G. Gutierrez, Jim Grudzinski, Bill Hanlon, Jiangang Hao, Steve Holland, Klaus Honscheid, Dave Huffman, Cheryl Jackson, Inga Karliner, Daekwang Kau, Steve Kent, Kurt Krempetz, John Krider, Mark Kozlovsky, Donna Kubik, Kyler Kuehn, Stephen Kuhlmann, Kevin Kuk, Ofer Lahav, Peter Lewis, Huan Lin, Wolfgang Lorenzon, Stuart Marshall, Gustavo Martínez, Timothy McKay, Wyatt Merritt, Mark Meyer, Ramon Miquel, Jim Morgan, Peter Moore, Todd Moore, Brian Nord, R. Ogando, Jamieson Olsen, John Peoples, Andreas Plazas, Natalie Roe, Aaron Roodman, B. Rossetto, E. Sanchez, Vic Scarpine, Terry Schalk, Rafe Schindler, Ricardo Schmidt, Richard Schmitt, Mike Schubnell, Kenneth Schultz, M. Selen, S. Serrano, Terri Shaw, Vaidis Simaitis, Jean Slaughter, R. Christopher Smith, Hal Spinka, Andy Stefanik, Walter Stuermer, Adam Sypniewski, Rick Talaga, Greg Tarle, Jon Thaler, Doug Tucker, Alistair Walker, Curtis Weaverdyck, William Wester, Robert Woods, Sue Worswick, Allen Zhao

Proceedings Volume 7735, 77350D (2010) https://doi.org/10.1117/12.856609

KEYWORDS: Charge-coupled devices, Telescopes, Imaging systems, CCD cameras, Cameras, Camera shutters, Optical filters, Lenses, Mirrors, Device simulation

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Proceedings Article | 22 August 2009 Paper

The design and alignment of the DECam lenses and modelling of the static shear pattern and its impact on weak lensing measurements

M. Antonik, P. Doel, D. Brooks, S. Bridle, T. Abbot, R. Bernstein, B. Bigelow, H. Cease, D. DePoy, B. Flaugher, M. Gladders, G. Gutierrez, S. Kent, A. Stefanik, A. Walker, S. Worswick

Proceedings Volume 7433, 74330M (2009) https://doi.org/10.1117/12.825869

KEYWORDS: Lenses, Tolerancing, Distortion, Finite element methods, Cameras, Optical filters, Optical alignment, Point spread functions, Prototyping, Telescopes

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Proceedings Article | 9 July 2008 Paper

Design and status of the optical corrector for the DES survey instrument

P. Doel, T. Abbott, M. Antonik, R. Bernstein, B. Bigelow, D. Brooks, H. Cease, D. DePoy, B. Flaugher, M. Gladders, G. Gutierrez, S. Kent, A. Stefanik, A. Walker, S. Worswick

Proceedings Volume 7014, 70141V (2008) https://doi.org/10.1117/12.790049

KEYWORDS: Cameras, Lens design, Telescopes, Optical alignment, Silica, Tolerancing, Optical design, Imaging systems, Finite element methods, Mirrors

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Proceedings Article | 9 July 2008 Paper

The Dark Energy Camera (DECam)

D. DePoy, T. Abbott, J. Annis, M. Antonik, M. Barceló, R. Bernstein, B. Bigelow, D. Brooks, E. Buckley-Geer, J. Campa, L. Cardiel, F. Castander, J. Castilla, H. Cease, S. Chappa, E. Dede, G. Derylo, H. Diehl, P. Doel, J. DeVicente, J. Estrada, D. Finley, B. Flaugher, E. Gaztanaga, D. Gerdes, M. Gladders, V. Guarino, G. Gutierrez, J. Hamilton, M. Haney, S. Holland, K. Honscheid, D. Huffman, I. Karliner, D. Kau, S. Kent, M. Kozlovsky, D. Kubik, K. Kuehn, S. Kuhlmann, K. Kuk, F. Leger, H. Lin, G. Martinez, M. Martinez, W. Merritt, J. Mohr, P. Moore, T. Moore, B. Nord, R. Ogando, J. Olsen, B. Onal, J. Peoples, T. Qian, N. Roe, E. Sanchez, V. Scarpine, R. Schmidt, R. Schmitt, M. Schubnell, K. Schultz, M. Selen, T. Shaw, V. Simaitis, J. Slaughter, C. Smith, H. Spinka, A. Stefanik, W. Stuermer, R. Talaga, G. Tarle, J. Thaler, D. Tucker, A. Walker, S. Worswick, A. Zhao

Proceedings Volume 7014, 70140E (2008) https://doi.org/10.1117/12.789466

KEYWORDS: Charge-coupled devices, Telescopes, Cameras, CCD cameras, Optical filters, Mirrors, Control systems, Quantum efficiency, Image processing, CCD image sensors

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Proceedings Article | 30 June 2006 Paper

Preliminary optical design for a 2.2 degree diameter prime focus corrector for the Blanco 4 meter telescope

S. Kent, R. Bernstein, T. Abbott, B. Bigelow, D. Brooks, P. Doel, B. Flaugher, M. Gladders, A. Walker, S. Worswick

Proceedings Volume 6269, 626937 (2006) https://doi.org/10.1117/12.672097

KEYWORDS: Point spread functions, Telescopes, Charge-coupled devices, Mirrors, Calibration, Stars, Optical instrument design, Glasses, Astronomy, Galactic astronomy

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Proceedings Article | 12 October 2004 Paper

An integral field spectrograph for SNAP

Anne Ealet, Eric Prieto, Alain Bonissent, Roger Malina, Gérard Smadja, A. Tilquin, Gary Bernstein, Stephane Basa, D. Fouchez, Olivier Le Fevre, Alain Mazure, Greg Aldering, R. Amanullah, Pierre Astier, E. Barrelet, Christopher Bebek, Lars Bergstrom, Manfred Bester, Roger Blandford, Ralph Bohlin, Charles Bower, Mark Brown, Myron Campbell, William Carithers, Eugene Commins, W. Craig, C. Day, F. DeJongh, Susana Deustua, H. Diehl, S. Dodelson, Richard Ellis, M. Emmet, Josh Frieman, Andrew Fruchter, D. Gerdes, L. Gladney, Gerson Goldhaber, Ariel Goobar, Donald Groom, Henry Heetderks, M. Hoff, Stephen Holland, M. Huffer, L. Hui, Dragan Huterer, B. Jain, Patrick Jelinsky, Armin Karcher, Steven Kent, Steven Kahn, Alex Kim, William Kolbe, B. Krieger, G. Kushner, N. Kuznetsova, Robin Lafever, J. Lamoureux, Michael Lampton, Michael Levi, P. Limon, Huan Lin, Eric Linder, Stewart Loken, W. Lorenzon, J. Marriner, P. Marshall, R. Massey, Timothy McKay, Shawn McKee, Ramon Miquel, Nicholas Morgan, E. Mörtsell, Nick Mostek, Stuart Mufson, J. Musser, Peter Nugent, Hakeem Oluseyi, Reynald Pain, Nick Palaio, David Pankow, John Peoples, Saul Perlmutter, David Rabinowitz, Alexandre Refregier, Jason Rhodes, Natalie Roe, D. Rusin, V. Scarpine, Michael Schubnell, Michael Sholl, Roger Smith, George Smoot, Jeffrey Snyder, Anthony Spadafora, A. Stebbins, Christopher Stoughton, Andrew Szymkowiak, Gregory Tarlé, Keith Taylor, Andrew Tomasch, Douglas Tucker, Henrik von der Lippe, D. Vincent, Jean-Pierre Walder, Guobin Wang, W. Wester

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.550600

KEYWORDS: Spectrographs, Sensors, Mirrors, Spectral resolution, Visible radiation, Telescopes, Prisms, Calibration, Prototyping, Space telescopes

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Proceedings Article | 12 October 2004 Paper

SNAP Telescope

Michael Sholl, Michael Lampton, Greg Aldering, W. Althouse, R. Amanullah, James Annis, Pierre Astier, Charles Baltay, E. Barrelet, Stephane Basa, Christopher Bebek, Lars Bergstrom, Gary Bernstein, Manfred Bester, Bruce Bigelow, Roger Blandford, Ralph Bohlin, Alain Bonissent, Charles Bower, Mark Brown, Myron Campbell, William Carithers, Eugene Commins, W. Craig, C. Day, F. DeJongh, Susana Deustua, T. Diehl, S. Dodelson, Anne Ealet, Richard Ellis, W. Emmet, D. Fouchez, Josh Frieman, Andrew Fruchter, D. Gerdes, L. Gladney, Gerson Goldhaber, Ariel Goobar, Donald Groom, Henry Heetderks, M. Hoff, Stephen Holland, M. Huffer, L. Hui, Dragan Huterer, B. Jain, Patrick Jelinsky, Armin Karcher, Steven Kahn, Steven Kent, Alex Kim, William Kolbe, B. Krieger, G. Kushner, N. Kuznetsova, Robin Lafever, J. Lamoureux, Olivier Le Fevre, Michael Levi, P. Limon, Huan Lin, Eric Linder, Stewart Loken, W. Lorenzon, Roger Malina, J. Marriner, P. Marshall, R. Massey, Alain Mazure, Timothy McKay, Shawn McKee, Ramon Miquel, Nicholas Morgan, E. Mörtsell, Nick Mostek, Stuart Mufson, J. Musser, Peter Nugent, Hakeem Oluseyi, Reynald Pain, Nick Palaio, David Pankow, John Peoples, Saul Perlmutter, Eric Prieto, David Rabinowitz, Alexandre Refregier, Jason Rhodes, Natalie Roe, D. Rusin, V. Scarpine, Michael Schubnell, Gérard Smadja, Roger Smith, George Smoot, Jeffrey Snyder, Anthony Spadafora, A. Stebbins, Christopher Stoughton, Andrew Szymkowiak, Gregory Tarlé, Keith Taylor, A. Tilquin, Andrew Tomasch, Douglas Tucker, D. Vincent, Henrik von der Lippe, Jean-Pierre Walder, Guobin Wang, W. Wester

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.552081

KEYWORDS: Mirrors, Telescopes, Space telescopes, Sensors, Stray light, Observatories, Silicon carbide, Zerodur, Fermium, Frequency modulation

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Proceedings Article | 8 December 2003 Paper

Calibrating SNAP

Susana Deustua, Sahar Allam, Ralph Bohlin, Steven Kent, Michael Lampton, Bryan Laubscher, Nick Mostek, Stuart Mufson, Michael Richmond, J. Smith, Douglas Tucker

Proceedings Volume 5164, (2003) https://doi.org/10.1117/12.506652

KEYWORDS: Calibration, Stars, Lamps, Near infrared, Atmospheric modeling, Telescopes, Spectral calibration, Analog electronics, Light sources, Spectrographs

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Proceedings Article | 5 March 2003 Paper

PRIME: probing the very early universe

Wei Zheng, Holland Ford, Jeffrey Kruk, Zlatan Tsvetanov, Alexander Szalay, George Hartig, Hervey Stockman, Marc Postman, G. Voit, Peter Shu, Matthew Greenhouse, Hans-Walter Rix, Rainer Lenzen, Steven Kent, Christopher Stoughton, Alain Omont, Yannick Mellier

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461927

KEYWORDS: Galactic astronomy, Space telescopes, Imaging spectroscopy, Astronomy, Spectroscopy, Telescopes, Databases, Infrared radiation, Planets, Galaxy groups and clusters

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Proceedings Article | 24 December 2002 Paper

Data processing factory for the Sloan Digital Sky Survey

Christopher Stoughton, Jennifer Adelman, James Annis, John Hendry, John Inkmann, Sebastian Jester, Steven Kent, Nickolai Kuropatkin, Brian Lee, Huan Lin, John Peoples, Robert Sparks, Douglas Tucker, Dan Vanden Berk, Brian Yanny, Dan Yocum

Proceedings Volume 4836, (2002) https://doi.org/10.1117/12.457014

KEYWORDS: Spectroscopy, Data processing, Calibration, Imaging spectroscopy, Databases, Telescopes, Data archive systems, Image processing, Cameras, Astronomy

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Proceedings Article | 13 December 2002 Paper

Sloan Digital Sky Survey photometric telescope automation and observing software

Eric Neilsen, Alan Uomoto, Steven Kent, James Annis

Proceedings Volume 4848, (2002) https://doi.org/10.1117/12.461028

KEYWORDS: Stars, Telescopes, Calibration, Human-machine interfaces, Point spread functions, Astronomy, Digital photography, Charge-coupled devices, Optical filters, Data acquisition

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Proceedings Article | 25 August 1998 Paper

Sloan digital sky survey 2.5-meter telescope: optics

Patrick Waddell, Edward Mannery, James Gunn, Steven Kent

Proceedings Volume 3352, (1998) https://doi.org/10.1117/12.319293

KEYWORDS: Telescopes, Optical coatings, Imaging spectroscopy, Mirrors, Polishing, Spectroscopy, Reflectivity, Optical design, Aspheric lenses, Imaging systems

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Proceedings Article | 1 June 1994 Paper

Data acquisition systems for the Sloan Digital Sky Survey

Don Petravick, Eileen Berman, Bryan Mackinnon, Thomas Nicinski, Ruth Pordes, Gary Sergey, Ron Rechenmacher, James Annis, Steven Kent, Timothy McKay, Christopher Stoughton, D. Husby

Proceedings Volume 2198, (1994) https://doi.org/10.1117/12.176788

KEYWORDS: Imaging systems, Data acquisition, Computing systems, Cameras, Telescopes, Charge-coupled devices, Control systems, CCD cameras, Spectrographs, Data modeling

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Proceedings Article | 1 June 1994 Paper

Sloan Digital Sky Survey monitor telescope system

James Annis, Eileen Berman, Steven Kent, Jonathon Loveday, Timothy McKay, Bryan Mackinnon, Jeffrey Munn, Thomas Nicinski, Wei Peng, Don Petravick, Ruth Pordes, Ron Rechenmacher, Gary Sergey, Christopher Stoughton

Proceedings Volume 2198, (1994) https://doi.org/10.1117/12.176741

KEYWORDS: Telescopes, Calibration, Cameras, Stars, CCD cameras, Databases, Space telescopes, Imaging spectroscopy, Data acquisition, Spectroscopy

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Showing 5 of 35 publications

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