Dr. William F. Hoffmann Profile

Dr. William F. Hoffmann

Emeritus Professor of Astronomy at Univ of Arizona

SPIE Involvement:

Author

Publications (41)

Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Overview and prospects of the LBTI beyond the completed HOSTS survey

Steve Ertel, Philip Hinz, Jordan Stone, Amali Vaz, Oscar Montoya, Grant West, Olivier Durney, Paul Grenz, Eckhart Spalding, Jarron Leisenring, Kevin Wagner, Narsireddy Anugu, Jennifer Power, Erin Maier, Denis Defrère, William Hoffmann, Saavidra Perera, Samantha Brown, Andrew Skemer, Bertrand Mennesson, Grant Kennedy, Elwood Downey, John Hill, Enrico Pinna, Alfio Puglisi, Fabio Rossi

Proceedings Volume 11446, 1144607 (2020) https://doi.org/10.1117/12.2561849

KEYWORDS: Mirrors, Interferometry, Adaptive optics, Telescopes, Interferometers, Cryogenics, Infrared imaging, Thermography, Infrared radiation, Nulling interferometry

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

The Michigan infrared test thermal ELT N-band (MITTEN) cryostat

R. Bowens, E. Viges, M. Meyer, D. Atkinson, J. Monnier, M. Morgenstern, J. Leisenring, W. Hoffmann

Proceedings Volume 11447, 1144737 (2020) https://doi.org/10.1117/12.2562995

KEYWORDS: Sensors, Thermography, Infrared radiation, Quantum efficiency, Infrared imaging, Infrared detectors, Mid-IR, Astronomy, Optical sensors, Image sensors

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Proceedings Article | 24 July 2018 Presentation + Paper

Presentation + Paper

The HOSTS survey for exo-zodiacal dust: preliminary results and future prospects

S. Ertel, G. Kennedy, D. Defrère, P. Hinz, A. Shannon, B. Mennesson, W. C. Danchi, C. Gelino, J. M. Hill, W. Hoffman, G. Rieke, E. Spalding, J. Stone, A. Vaz, A. Weinberger, P. Willems, O. Absil, P. Arbo, V. Bailey, C. Beichman, G. Bryden, E. Downey, O. Durney, S. Esposito, A. Gaspar, P. Grenz, C. Haniff, J. Leisenring, L. Marion, T. McMahon, R. Millan-Gabet, M. Montoya, K. Morzinski, E. Pinna, J. Power, A. Puglisi, A. Roberge, E. Serabyn, A. Skemer, K. Stapelfeldt, K. Y. L. Su, V. Vaitheeswaran, M. Wyatt

Proceedings Volume 10698, 106981V (2018) https://doi.org/10.1117/12.2313685

KEYWORDS: Stars, Planets, Calibration, Statistical analysis, Exoplanets, Space telescopes, Nulling interferometry, Astronomy, Telescopes, Interferometry

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The presence of large amounts of dust in the habitable zones of nearby stars is a significant obstacle for future exo-Earth imaging missions. We executed the HOSTS (Hunt for Observable Signatures of Terrestrial Systems) survey to determine the typical amount of such exozodiacal dust around a sample of nearby main sequence stars. The majority of the data have been analyzed and we present here an update of our ongoing work. Nulling interferometry in N band was used to suppress the bright stellar light and to detect faint, extended circumstellar dust emission. We present an overview of the latest results from our ongoing work. We find seven new N band excesses in addition to the high confidence confirmation of three that were previously known. We find the first detections around Sun-like stars and around stars without previously known circumstellar dust. Our overall detection rate is 23%. The inferred occurrence rate is comparable for early type and Sun-like stars, but decreases from 71^{+11 -20}% for stars with previously detected mid- to far-infrared excess to 11^{+9 -4}% for stars without such excess, confirming earlier results at high confidence. For completed observations on individual stars, our sensitivity is five to ten times better than previous results. Assuming a lognormal luminosity function of the dust, we find upper limits on the median dust level around all stars without previously known mid to far infrared excess of 11.5 zodis at 95% confidence level. The corresponding upper limit for Sun-like stars is 16 zodis. An LBTI vetted target list of Sun-like stars for exo-Earth imaging would have a corresponding limit of 7.5 zodis. We provide important new insights into the occurrence rate and typical levels of habitable zone dust around main sequence stars. Exploiting the full range of capabilities of the LBTI provides a critical opportunity for the detailed characterization of a sample of exozodiacal dust disks to understand the origin, distribution, and properties of the dust.

Proceedings Article | 4 August 2016 Paper

Paper

Simultaneous water vapor and dry air optical path length measurements and compensation with the large binocular telescope interferometer

D. Defrère, P. Hinz, E. Downey, M. Böhm, W. Danchi, O. Durney, S. Ertel, J. Hill, W. Hoffmann, B. Mennesson, R. Millan-Gabet, M. Montoya, J.-U. Pott, A. Skemer, E. Spalding, J. Stone, A. Vaz

Proceedings Volume 9907, 99071G (2016) https://doi.org/10.1117/12.2233884

KEYWORDS: Water, Optical testing, Interferometers, Infrared radiation, Telescopes, Interferometry, Phase measurement, K band, Nulling interferometry, Sensors

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Proceedings Article | 4 August 2016 Paper

Paper

Overview of LBTI: a multipurpose facility for high spatial resolution observations

P. Hinz, D. Defrère, A. Skemer, V. Bailey, J. Stone, E. Spalding, A. Vaz, E. Pinna, A. Puglisi, S. Esposito, M. Montoya, E. Downey, J. Leisenring, O. Durney, W. Hoffmann, J. Hill, R. Millan-Gabet, B. Mennesson, W. Danchi, K. Morzinski, P. Grenz, M. Skrutskie, S. Ertel

Proceedings Volume 9907, 990704 (2016) https://doi.org/10.1117/12.2233795

KEYWORDS: Nulling interferometry, Cameras, Spatial resolution, Adaptive optics, Telescopes, Interferometers, Mirrors, Stars, Sensors, Focus stacking software

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Proceedings Article | 16 September 2015 Paper

Paper

Exoplanet science with the LBTI: instrument status and plans

D. Defrère, P. Hinz, A. Skemer, V. Bailey, E. Downey, O. Durney, J. Eisner, J. Hill, W. Hoffmann, J. Leisenring, T. McMahon, M. Montoya, E. Spalding, J. Stone, A. Vaz, O. Absil, S. Esposito, M. Kenworthy, B. Mennesson, R. Millan-Gabet, M. Nelson, A. Puglisi, M. Skrutskie, J. Wilson

Proceedings Volume 9605, 96051G (2015) https://doi.org/10.1117/12.2188912

KEYWORDS: Exoplanets, Interferometry, Error analysis, Telescopes, Nulling interferometry, Planets, Sensors, Adaptive optics, Coronagraphy, Spatial resolution

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Proceedings Article | 24 July 2014 Paper

Paper

Commissioning the LBTI for use as a nulling interferometer and coherent imager

Phil Hinz, Vanessa Bailey, D. Defrère, E. Downey, Simone Esposito, J. Hill, William Hoffmann, J. Leisenring, Manny Montoya, T. McMahon, A. Puglisi, A. Skemer, M. Skrutskie, Vidhya Vaitheeswaran, Amali Vaz

Proceedings Volume 9146, 91460T (2014) https://doi.org/10.1117/12.2057340

KEYWORDS: Calibration, Nulling interferometry, Interferometers, Error analysis, Imaging systems, Telescopes, Stars, Coherence imaging, Sensors, Signal detection

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Proceedings Article | 24 July 2014 Paper

Paper

Co-phasing the Large Binocular Telescope: status and performance of LBTI/PHASECam

D. Defrère, P. Hinz, E. Downey, D. Ashby, V. Bailey, G. Brusa , J. Christou, W. Danchi, P. Grenz, J. Hill, W. Hoffmann, J. Leisenring, J. Lozi, T. McMahon, B. Mennesson, R. Millan-Gabet, M. Montoya, K. Powell, A. Skemer, V. Vaitheeswaran, A. Vaz, C. Veillet

Proceedings Volume 9146, 914609 (2014) https://doi.org/10.1117/12.2057178

KEYWORDS: Telescopes, Mirrors, Phase measurement, Interferometry, Nulling interferometry, Sensors, Space telescopes, Interferometers, Infrared imaging, Exoplanets

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Proceedings Article | 21 July 2014 Paper

Paper

L'-band AGPM vector vortex coronagraph's first light on LBTI/LMIRCam

D. Defrère, O. Absil, P. Hinz, J. Kuhn, D. Mawet, B. Mennesson, A. Skemer, K. Wallace, V. Bailey, E. Downey, C. Delacroix, O. Durney, P. Forsberg, C. Gomez, S. Habraken, W. Hoffmann, M. Karlsson, M. Kenworthy, J. Leisenring, M. Montoya, L. Pueyo, M. Skrutskie, J, Surdej

Proceedings Volume 9148, 91483X (2014) https://doi.org/10.1117/12.2057205

KEYWORDS: Coronagraphy, Planets, Telescopes, Stars, Space telescopes, Signal to noise ratio, Adaptive optics, Principal component analysis, Point spread functions, Spiral phase plates

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Proceedings Article | 8 July 2014 Paper

Paper

Operation and performance of the mid-infrared camera, NOMIC, on the Large Binocular Telescope

William Hoffmann, Philip Hinz, Denis Defrère, Jarron Leisenring, Andrew Skemer, Paul Arbo, Manny Montoya, Bertrand Mennesson

Proceedings Volume 9147, 91471O (2014) https://doi.org/10.1117/12.2057252

KEYWORDS: Cameras, Telescopes, Sensors, Stars, Mid-IR, Interferometry, Interferometers, Observatories, Nulling interferometry, Mirrors

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Proceedings Article | 24 September 2012 Paper

Paper

On-sky operations and performance of LMIRcam at the Large Binocular Telescope

J. Leisenring, M. Skrutskie, P. Hinz, A. Skemer, V. Bailey, J. Eisner, P. Garnavich, W. Hoffmann, T. Jones, M. Kenworthy, P. Kuzmenko, M. Meyer, M. Nelson, T. Rodigas, J. Wilson, V. Vaitheeswaran

Proceedings Volume 8446, 84464F (2012) https://doi.org/10.1117/12.924814

KEYWORDS: Sensors, Point spread functions, Telescopes, Interferometry, Adaptive optics, Cadmium sulfide, Stars, Mirrors, Electronics, Diffraction

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Proceedings Article | 24 September 2012 Paper

Paper

TIGER: a high contrast infrared imager for the Giant Magellan Telescope

Philip Hinz, Johanan Codona, Olivier Guyon, William Hoffmann, Andrew Skemer, Joseph Hora, Volker Tolls, Alan Boss, Alycia Weinberger, Paul Arbo, Thomas Connors, Olivier Durney, Thomas McMahon, Manny Montoya, Vidhya Vaitheeswaran

Proceedings Volume 8446, 84461P (2012) https://doi.org/10.1117/12.926751

KEYWORDS: Coronagraphy, Adaptive optics, Cameras, Stars, Telescopes, Speckle, Infrared telescopes, Infrared imaging, Infrared radiation, Sensors

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Proceedings Article | 21 September 2012 Paper

Paper

The IRAC point response function in the warm Spitzer mission

Joseph Hora, Massimo Marengo, Rebecca Park, Denise Wood, William Hoffmann, Patrick Lowrance, Sean Carey, Jason Surace, Jessica Krick, William Glaccum, James Ingalls, Seppo Laine, Giovanni Fazio, Matthew Ashby, Zhong Wang

Proceedings Volume 8442, 844239 (2012) https://doi.org/10.1117/12.926894

KEYWORDS: Stars, Cryogenics, Space telescopes, Point spread functions, Sensors, Telescopes, Infrared cameras, Photometry, Infrared telescopes, Diffraction

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Proceedings Article | 12 September 2012 Paper

Paper

First AO-corrected interferometry with LBTI: steps towards routine coherent imaging observations

Phil Hinz, P. Arbo, V. Bailey, T. Connors, O. Durney, Simone Esposito, W. Hoffmann, T. Jones, J. Leisenring, M. Montoya, M. Nash, M. Nelson, T. McMahon, E. Pinna, A. Puglisi, A. Skemer, M. Skrutskie, V. Vaitheeswaran

Proceedings Volume 8445, 84450U (2012) https://doi.org/10.1117/12.926746

KEYWORDS: Adaptive optics, Telescopes, Interferometry, Prototyping, Stars, Point spread functions, Coherence imaging, Cameras, Imaging systems, Exoplanets

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Proceedings Article | 5 August 2010 Paper

Paper

Calibration and data quality of warm IRAC

S. Carey, J. Surace, W. Glaccum, J. Ingalls, J. Krick, M. Lacy, P. Lowrance, S. Laine, J. O'Linger, J. Stauffer, S. Willner, J. Hora, W. Hoffmann, M. L. N. Ashby, J.-S. Huang, M. Marengo, M. Pahre, Z. Wang, M. Werner, G. Fazio

Proceedings Volume 7731, 77310N (2010) https://doi.org/10.1117/12.857788

KEYWORDS: Cryogenics, Calibration, Photometry, Infrared telescopes, Space telescopes, Stars, Sensors, Signal to noise ratio, Exoplanets, Multiplexers

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Proceedings Article | 20 July 2010 Paper

Paper

The Large Binocular Telescope mid-infrared camera (LMIRcam): final design and status

M. Skrutskie, T. Jones, P. Hinz, P. Garnavich, J. Wilson, M. Nelson, E. Solheid, O. Durney, W. Hoffmann, V. Vaitheeswaran, T. McMahon, J. Leisenring, A. Wong

Proceedings Volume 7735, 77353H (2010) https://doi.org/10.1117/12.857724

KEYWORDS: Mirrors, Sensors, Optical filters, Telescopes, L band, Cameras, Optical benches, Mid-IR, Optical instrument design, Electronics

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Proceedings Article | 15 July 2010 Paper

Paper

Integration and characterization of HAWAII-1RG detector with FORCAST fast-readout electronics for LMIRcam

Jarron Leisenring, Matthew Nelson, William Hoffmann, Justin Schoenwald, Andre Wong, Michael Skrutskie

Proceedings Volume 7735, 77352N (2010) https://doi.org/10.1117/12.857615

KEYWORDS: Sensors, Electronics, Clocks, Infrared cameras, Telescopes, Data acquisition, Field programmable gate arrays, Space telescopes, Point spread functions, Human-machine interfaces

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Proceedings Article | 8 August 2008 Paper

Paper

The Magellan Telescope adaptive secondary AO system

Laird Close, Victor Gasho, Derek Kopon, Phil Hinz, William Hoffmann, Alan Uomoto, Tyson Hare

Proceedings Volume 7015, 70150Y (2008) https://doi.org/10.1117/12.789527

KEYWORDS: Adaptive optics, Mid-IR, Telescopes, Actuators, Cameras, Stars, Mirrors, Interfaces, Charge-coupled devices, Electronics

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Proceedings Article | 28 July 2008 Paper

Paper

Status of the LBT interferometer

Philip Hinz, Teresa Bippert-Plymate, Andy Breuninger, Tom Connors, Brian Duffy, Simone Esposito, William Hoffmann, Jihun Kim, Joe Kraus, Thomas McMahon, Manny Montoya, Richard Nash, Olivier Durney, Elliott Solheid, Andrea Tozzi, Vidhya Vaitheeswaran

Proceedings Volume 7013, 701328 (2008) https://doi.org/10.1117/12.790211

KEYWORDS: Mirrors, Interferometers, Telescopes, Cameras, Observatories, Infrared radiation, Imaging systems, Wavefront sensors, Ferroelectric materials, Infrared imaging

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Proceedings Article | 28 July 2008 Paper

Paper

NIC: LBTI's nulling and imaging camera

Philip Hinz, Elliott Solheid, Oli Durney, William Hoffmann

Proceedings Volume 7013, 701339 (2008) https://doi.org/10.1117/12.790242

KEYWORDS: Cameras, Mirrors, Sensors, Nulling interferometry, Interferometers, Optical design, Nanoimprint lithography, Staring arrays, Thermography, Telescopes

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Proceedings Article | 12 July 2008 Paper

Paper

Improving the photometric precision of IRAC Channel 1

Kenneth Mighell, William Glaccum, William Hoffmann

Proceedings Volume 7010, 70102W (2008) https://doi.org/10.1117/12.789801

KEYWORDS: Photometry, Stars, Point spread functions, Sensors, Space telescopes, Infrared telescopes, Quantum efficiency, Infrared cameras, Cameras, Image processing

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Proceedings Article | 20 October 2004 Paper

Paper

Large Binocular Telescope Interferometer: the universal beam combiner

Philip Hinz, Tom Connors, Tom McMahon, Andrew Cheng, Chien Peng, William Hoffmann, Donald McCarthy, Roger Angel

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.552337

KEYWORDS: Mirrors, Telescopes, Interferometers, Adaptive optics, Ferroelectric materials, Interferometry, Point spread functions, Mid-IR, Optical design, Thermography

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Proceedings Article | 12 October 2004 Paper

Paper

Comparison of laboratory and in-flight performance of infared array camera (IRAC) detector arrays on Spitzer Space Telescope

Judith Pipher, Craig McMurtry, William Forrest, Craig McCreight, Mark McKelvey, Robert McMurray, Roy Johnson, Giovanni Fazio, Joseph Hora, Lori Allen, Matthew Ashby, Pauline Barmby, Lynne Deutsch, Jiasheng Huang, Massimo Marengo, S. Thomas Megeath, Michael Pahre, Brian Patten, Zhong Wang, Steven Willner, William Hoffmann, Samuel Moseley, Richard Arendt, Danny Krebs, Peter Eisenhardt, Daniel Stern, Varoujan Gorjian, Bidushi Bhattacharya, William Glaccum, Mark Lacy, Patrick Lowrance, Sean Carey, Seppo Laine, John Stauffer, Jason Surace, William Reach, Gillian Wilson

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551599

KEYWORDS: Sensors, Multiplexers, Detector arrays, Quantum efficiency, Space telescopes, Cameras, Infrared telescopes, Infrared cameras, Calibration, Infrared radiation

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Proceedings Article | 12 October 2004 Paper

Paper

Observing with the infrared array camera (IRAC) on the Spitzer Space Telescope

Sean Carey, Mark Lacy, Seppo Laine, William Reach, Jason Surace, William Glaccum, Joseph Hora, Steven Willner, Richard Arendt, Matthew Ashby, Lori Allen, Pauline Barmby, Bidushi Bhattacharya, Lynne Deutsch, Peter Eisenhardt, William Hoffmann, Jiasheng Huang, Patrick Lowrance, Massimo Marengo, S. Thomas Megeath, Brant Nelson, Michael Pahre, Brian Patten, Judith Pipher, John Stauffer, Daniel Stern, Zhong Wang, Gillian Wilson, Giovanni Fazio

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.550968

KEYWORDS: Calibration, Infrared telescopes, High dynamic range imaging, Space telescopes, Stray light, Infrared cameras, Stars, Infrared radiation, Space operations, Telescopes

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Proceedings Article | 12 October 2004 Paper

Paper

In-flight performance and calibration of the Infrared Array Camera (IRAC) for the Spitzer Space Telescope

Joseph Hora, Giovanni Fazio, Lori Allen, Matthew Ashby, Pauline Barmby, Lynne Deutsch, Jiasheng Huang, Massimo Marengo, S. Megeath, Gary Melnick, Michael Pahre, Brian Patten, Howard Smith, Zhong Wang, Steven Willner, William Hoffmann, Judith Pipher, William Forrest, Craig McMurtry, Craig McCreight, Mark McKelvey, Robert McMurray, Samuel Moseley, Richard Arendt, John Mentzell, Catherine Marx, Dale Fixsen, Eric Tollestrup, Peter Eisenhardt, Daniel Stern, Varoujan Gorjian, Bidushi Bhattacharya, Sean Carey, William Glaccum, Mark Lacy, Patrick Lowrance, Seppo Laine, Brant Nelson, William Reach, John Stauffer, Jason Surace, Gillian Wilson, Edward Wright

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.550744

KEYWORDS: Stars, Calibration, Light scattering, Sensors, Stray light, Infrared telescopes, Point spread functions, Cameras, Space telescopes, Infrared cameras

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Proceedings Article | 12 October 2004 Paper

Paper

Determination of Spitzer Space Telescope focus from IRAC images without a focus slew

William Hoffmann, Joseph Hora, John Mentzell, Catherine Marx, Peter Eisenhardt, Sean Carey, S. Megeath, John Schwenker

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.550649

KEYWORDS: Telescopes, Stars, Space telescopes, Device simulation, Diffraction, Point spread functions, Aerospace engineering, Image analysis, Image processing, Phase retrieval

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Proceedings Article | 12 October 2004 Paper

Paper

The state of the focus and image quality of the Spitzer Space Telescope as measured in orbit

Robert Gehrz, Edward Romana, William Hoffmann, John Schwenker, John Mentzell, Joseph Hora, Peter Eisenhardt, Bernhard Brandl, Lee Armus, Karl Stapelfeldt, Dean Hines, Amanda Mainzer, Erick Young, David Elliott

Proceedings Volume 5487, (2004) https://doi.org/10.1117/12.551930

KEYWORDS: Telescopes, Space telescopes, Mirrors, Point spread functions, Diffraction, Cryogenics, Image quality, Infrared telescopes, Infrared imaging, Tolerancing

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Proceedings Article | 5 March 2003 Paper

Paper

Simfit and focus diversity: methods for determining the focus of the SIRTF telescope in space without a focus slew

William Hoffmann, Joseph Hora, J. Eric Mentzell, Catherine Marx, Peter Eisenhardt

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461528

KEYWORDS: Stars, Device simulation, Telescopes, Space telescopes, Diffraction, Aerospace engineering, Image quality, Image processing, Optical testing, Cryogenics

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Proceedings Article | 5 March 2003 Paper

Paper

Performance of the infrared array camera (IRAC) for SIRTF during instrument integration and test

Joseph Hora, Giovanni Fazio, Lori Allen, Matthew Ashby, Pauline Barmby, Lynne Deutsch, Jiasheng Huang, S. Thomas Megeath, Michael Pahre, Brian Patten, Zhong Wang, Steven Willner, William Hoffmann, J. Eric Mentzell, Peter Eisenhardt, Daniel Stern, Varoujan Gorjian, William Glaccum, Mark Lacy, Sean Carey, Jason Surace, William Reach, Judith Pipher, William Forrest, Craig McCreight

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461791

KEYWORDS: Calibration, Camera shutters, Lamps, Short wave infrared radiation, Sensors, Optical testing, Telescopes, Cameras, Infrared telescopes, Infrared cameras

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Proceedings Article | 5 March 2003 Paper

Paper

SIRTF-CTA optical performance test results

John Schwenker, Bernhard Brandl, William Hoffmann, Joseph Hora, Amanda Mainzer, John Mentzell, Jeff Van Cleve

Proceedings Volume 4850, (2003) https://doi.org/10.1117/12.461925

KEYWORDS: Telescopes, Wavefronts, Fermium, Frequency modulation, Phase retrieval, Space telescopes, Mirrors, Infrared telescopes, Infrared imaging, Performance modeling

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Proceedings Article | 21 February 2003 Paper

Paper

The Large Binocular Telescope interferometer

Philip Hinz, James Roger Angel, Donald McCarthy, William Hoffman, Chien Peng

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459338

KEYWORDS: Telescopes, Interferometers, Space telescopes, Interferometry, Mirrors, Nulling interferometry, Imaging systems, Planetary systems, Infrared radiation, Planets

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Proceedings Article | 16 November 2000 Paper

Paper

Calibration and performance of the infrared array camera (IRAC)

Joseph Hora, Giovanni Fazio, Steven Willner, Michael Ashby, Jiasheng Huang, S. Thomas Megeath, John Stauffer, Eric Tollestrup, Zhong Wang, William Glaccum, Judith Pipher, William Forrest, Craig McCreight, Mark McKelvey, William Hoffman, Peter Eisenhardt, Jason Surace, William Reach, Samuel Moseley, Richard Arendt, Kenneth Stewart, F. David Robinson

Proceedings Volume 4131, (2000) https://doi.org/10.1117/12.406553

KEYWORDS: Calibration, Sensors, Black bodies, Cameras, Telescopes, Infrared cameras, Camera shutters, Point spread functions, Infrared radiation, Infrared telescopes

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Proceedings Article | 16 November 2000 Paper

Paper

Implementation and testing of SIRTF's infrared array camera (IRAC)

Felicia Jones-Selden, T. Ackerson, Christine Allen, M. Armbruster, Richard Barney, Jamie Britt, W. Eichorn, Jose Florez, Giovanni Fazio, William Glaccum, J. Golder, Qian Gong, B. Grammer, Claef Hakun, P. Haney, S. Hendricks, William Hoffman, Joseph Hora, Murzy Jhabvala, Ray Jungo, Gabriel Karpati, Danny Krebs, J. Lander, Michael Lander, Patricia Lyons, S. Mann, Catherine Marx, Samuel Moseley, John Polizotti, Juan Rivera, F. David Robinson, W. Rosborough, David Schwinger, Kamdin Shakoorzadeh, Kenneth Stewart, Richard Taylor, C. Tomasevich, Victor Torres, Carlos Trujillo, R. Trunzo, Steven Willner, Lois Workman

Proceedings Volume 4131, (2000) https://doi.org/10.1117/12.406572

KEYWORDS: Sensors, Infrared cameras, Electronics, Infrared radiation, Space telescopes, Infrared telescopes, Calibration, Cryogenics, Cameras, Galactic astronomy

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Proceedings Article | 5 July 2000 Paper

Paper

BLINC: a testbed for nulling interferometry in the thermal infrared

Philip Hinz, James Roger Angel, Neville Woolf, William Hoffmann, Donald McCarthy

Proceedings Volume 4006, (2000) https://doi.org/10.1117/12.390225

KEYWORDS: Stars, Infrared radiation, Telescopes, Nulling interferometry, Planets, Interferometers, Thermography, Jupiter, Mirrors, Dielectrics

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Proceedings Article | 8 December 1998 Paper

Paper

Low-temperature figure stability of a COI all-composite mirror M4

Patrick Woida, William Hoffmann, Steven Connell, Eldon Kasl

Proceedings Volume 3430, (1998) https://doi.org/10.1117/12.332490

KEYWORDS: Mirrors, Temperature metrology, Monochromatic aberrations, Interferometers, Composites, Spherical lenses, Thermal effects, Lightweight mirrors, Distortion, Observatories

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Proceedings Article | 28 August 1998 Paper

Paper

Sol-gel coating of composite mirrors to provide a surface for optical figuring

Patrick Woida, William Hoffmann

Proceedings Volume 3356, (1998) https://doi.org/10.1117/12.324452

KEYWORDS: Coating, Mirrors, Surface finishing, Composites, Polishing, Sol-gels, Glasses, Infrared radiation, Carbon, Spherical lenses

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Proceedings Article | 21 August 1998 Paper

Paper

Infrared array camera (IRAC) for the Space Infrared Telescope Facility (SIRTF)

Giovanni Fazio, Joseph Hora, Steven Willner, John Stauffer, Michael Ashby, Zhong Wang, Eric Tollestrup, Judith Pipher, William Forrest, Craig McCreight, Samuel Moseley, William Hoffmann, Peter Eisenhardt, Edward Wright

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317225

KEYWORDS: Galactic astronomy, Infrared telescopes, Cameras, Infrared cameras, Sensors, Calibration, Space telescopes, Infrared radiation, Detector arrays, Stars

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Proceedings Article | 21 August 1998 Paper

Paper

MIRAC2: a mid-infrared array camera for astronomy

William Hoffmann, Joseph Hora, Giovanni Fazio, Lynne Deutsch, Aditya Dayal

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317327

KEYWORDS: Signal processing, Sensors, Digital signal processing, Cameras, Electrons, Field effect transistors, Telescopes, Clocks, Filtering (signal processing), Astronomy

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Proceedings Article | 24 July 1998 Paper

Paper

First results of nulling interferometry with the Multiple-Mirror Telescope

Philip Hinz, James Roger Angel, William Hoffmann, Donald McCarthy, Patrick McGuire, Matthew Cheselka, Joseph Hora, Neville Woolf

Proceedings Volume 3350, (1998) https://doi.org/10.1117/12.317108

KEYWORDS: Stars, Telescopes, Nulling interferometry, Space telescopes, Wavefronts, Adaptive optics, Beam splitters, Mirrors, Interferometers, Colorimetry

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Proceedings Article | 11 July 1997 Paper

Paper

Enhancing CRFP panels with silicon monoxide to improve as-replicated figure accuracy

Patrick Woida, William Hoffmann

Proceedings Volume 3113, (1997) https://doi.org/10.1117/12.278881

KEYWORDS: Coating, Mirrors, Surface finishing, Composites, Polishing, Silicon, Silicon carbide, Abrasives, Carbon, Glasses

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Proceedings Article | 20 October 1993 Paper

Paper

MIRAC: a mid-infrared array camera for astronomy

William Hoffmann, Giovanni Fazio, Kandiah Shivanandan, Joseph Hora, Lynne Deutsch

Proceedings Volume 1946, (1993) https://doi.org/10.1117/12.158697

KEYWORDS: Sensors, Signal processing, Telescopes, Cameras, Optical filters, Space telescopes, Infrared detectors, Digital signal processing, Electronics, Signal detection

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Showing 5 of 41 publications

Conference Committee Involvement (1)

Imaging Technology and Telescopes

30 July 2000 | San Diego, CA, United States

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