Dr. Luke D. Keller Profile

Dr. Luke D. Keller

Assistant Professor at Ithaca College

SPIE Involvement:

Author

Publications (22)

Proceedings Article | 31 July 2014 Paper

Paper

SOFIA science instruments: commissioning, upgrades and future opportunities

Erin Smith, John Miles, L. Andrew Helton, Ravi Sankrit, B. Andersson, Eric Becklin, James De Buizer, C. Dowell, Edward Dunham, Rolf Güsten, Doyal Harper, Terry Herter, Luke Keller, Randolf Klein, Alfred Krabbe, Sarah Logsdon, Pamela Marcum, Ian McLean, William Reach, Matthew Richter, Thomas Roellig, Göran Sandell, Maureen Savage, Pasquale Temi, William Vacca, John Vaillancourt, Jeffrey Van Cleve, Erick Young

Proceedings Volume 9147, 914706 (2014) https://doi.org/10.1117/12.2056942

KEYWORDS: Spectroscopy, Observatories, Imaging spectroscopy, Infrared spectroscopy, Sensors, Infrared cameras, Spectroscopes, Cameras, Radio astronomy, Astronomy

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Proceedings Article | 19 September 2013 Paper

Paper

Capabilities, performance, and status of the SOFIA science instrument suite

John Miles, L. Andrew Helton, Ravi Sankrit, B. Andersson, E. Becklin, James De Buizer, C. Dowell, Edward Dunham, Rolf Güsten, Doyal Harper, Terry Herter, Luke Keller, Randolf Klein, Alfred Krabbe, Pamela Marcum, Ian McLean, William Reach, Matthew Richter, Thomas Roellig, Göran Sandell, Maureen Savage, Erin Smith, Pasquale Temi, William Vacca, John Vaillancourt, Jeffery Van Cleve, Erick Young, Peter Zell

Proceedings Volume 8867, 88670N (2013) https://doi.org/10.1117/12.2022791

KEYWORDS: Spectroscopy, Telescopes, Observatories, Stars, Sensors, Imaging systems, Astronomy, Photometry, Infrared telescopes, Infrared radiation

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Proceedings Article | 24 September 2012 Paper

Paper

The FORCAST mid-infrared facility instrument and in-flight performance on SOFIA

Joseph Adams, Terry Herter, George Gull, Justin Schoenwald, Charles Henderson, Luke Keller, James De Buizer, Gordon Stacey, Thomas Nikola, William Vacca, Lea Hirsch, Jason Wang, L. Andrew Helton

Proceedings Volume 8446, 844616 (2012) https://doi.org/10.1117/12.926600

KEYWORDS: Sensors, Calibration, Telescopes, Mirrors, Spectroscopes, Optical filters, Quantum efficiency, Signal to noise ratio, Stars, Spectroscopy

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Proceedings Article | 21 July 2010 Paper

Paper

Progress report on FORCAST grism spectroscopy as a future general observer instrument mode on SOFIA

Luke Keller, Casey Deen, Daniel Jaffe, Kimberly Ennico, Thomas Greene, Joseph Adams, Terry Herter, Gregory Sloan

Proceedings Volume 7735, 77356N (2010) https://doi.org/10.1117/12.857127

KEYWORDS: Calibration, Spectroscopes, Spectroscopy, Data acquisition, Software development, Spectral calibration, Imaging spectroscopy, Mid-IR, Optical filters, Astronomy

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Proceedings Article | 21 July 2010 Paper

Paper

Quick-look reduction software for FORCAST grism mode on SOFIA

Casey Deen, Luke Keller, Nirbhik Chitrakar, Kimberly Ennico, Daniel Jaffe, Joseph Adams, Thomas Greene, Terry Herter, Gregory Sloan

Proceedings Volume 7735, 773570 (2010) https://doi.org/10.1117/12.856608

KEYWORDS: Calibration, Cameras, Telescopes, Sensors, Silicon, Optical filters, Spectral resolution, Spectroscopes, Software development, Image processing

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Proceedings Article | 15 July 2010 Paper

Paper

FORCAST: a first light facility instrument for SOFIA

Joseph Adams, Terry Herter, George Gull, Justin Schoenwald, Charles Henderson, Luke Keller, James De Buizer, Gordon Stacey, Thomas Nikola

Proceedings Volume 7735, 77351U (2010) https://doi.org/10.1117/12.857049

KEYWORDS: Mirrors, Telescopes, Sensors, Calibration, Optical filters, Stars, Quantum efficiency, Signal to noise ratio, Jupiter, Infrared imaging

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Proceedings Article | 9 July 2008 Paper

Paper

A silicon and KRS-5 grism suite for FORCAST on SOFIA

Casey Deen, Luke Keller, Kimberly Ennico, Daniel Jaffe, Jasmina Marsh, Joseph Adams, Nirbhik Chitrakar, Thomas Greene, Douglas Mar, Terry Herter

Proceedings Volume 7014, 70142C (2008) https://doi.org/10.1117/12.788565

KEYWORDS: Silicon, Spectral resolution, Cameras, Optical filters, Space telescopes, Stars, Absorption, Calibration, Spectroscopes, Telescopes

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Proceedings Article | 9 July 2008 Paper

Paper

FORCAST: the first light instrument for SOFIA

Joseph Adams, Terry Herter, George Gull, Justin Schoenwald, Luke Keller, Marc Berthoud, Gordon Stacy, Thomas Nikola, Charles Henderson

Proceedings Volume 7014, 70142F (2008) https://doi.org/10.1117/12.789510

KEYWORDS: Telescopes, Mirrors, Optical filters, Sensors, Cameras, Calibration, Image quality, Beam splitters, Point spread functions, Astronomy

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Proceedings Article | 29 June 2006 Paper

Paper

Grism performance for mid-IR (5-40 micron) spectroscopy

K. Ennico, L. Keller, D. Mar, T. Herter, D. Jaffe, J. Adams, T. Greene

Proceedings Volume 6269, 62691Q (2006) https://doi.org/10.1117/12.672256

KEYWORDS: Silicon, Spectroscopes, Mid-IR, Spectroscopy, Molecules, Spectral resolution, Stars, Infrared spectroscopy, Infrared radiation, Astronomy

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Proceedings Article | 28 June 2006 Paper

Paper

FORCAST: the facility mid-IR camera for SOFIA

Joseph Adams, Terry Herter, Luke Keller, George Gull, Bruce Pirger, Justin Schoenwald, Marc Berthoud, Gordon Stacy, Thomas Nikola

Proceedings Volume 6269, 626911 (2006) https://doi.org/10.1117/12.671414

KEYWORDS: Cameras, Mirrors, Telescopes, Sensors, Optical filters, Electronics, Space telescopes, Staring arrays, Distortion, Silicon

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Proceedings Article | 27 June 2006 Paper

Paper

Performance of large chemically etched silicon grisms for infrared spectroscopy

D. Mar, J. Marsh, D. Jaffe, L. Keller, K. Ennico

Proceedings Volume 6269, 62695R (2006) https://doi.org/10.1117/12.671728

KEYWORDS: Silicon, Point spread functions, Spectral resolution, Scanning electron microscopy, Infrared spectroscopy, Infrared radiation, Crystals, Mid-IR, Absorption, Surface finishing

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Proceedings Article | 15 June 2006 Paper

Paper

High-speed highly flexible reconfigurable data acquisition system for astronomy

Bruce Pirger, Justin Schoenwald, Terry Herter, George Gull, Joseph Adams, Luke Keller, Marc Berthoud, Charles Henderson, Gordon Stacy, Thomas Nikola

Proceedings Volume 6276, 62760X (2006) https://doi.org/10.1117/12.672249

KEYWORDS: Field programmable gate arrays, Sensors, Analog electronics, Data acquisition, Electronics, Mirrors, Clocks, Digital signal processing, Connectors, Staring arrays

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We have developed a high speed, flexible, data acquisition system and targeted it to astronomical imaging. The system is based on Field Programmable Gate Arrays (FPGAs) and provides a gigabit/sec fiber optic link between the electronics located on the instrument and the host computer. The FPGAs are reconfigurable over the fiber optic link for maximum flexibility. The system has initially been targeted at DRS Technologies' 256x256 Si:As and Si:Sb detectors used in FORCAST¹, a mid-IR camera/spectrograph built by Cornell University for SOFIA. The initial configuration provides sixteen parallel channels of six Msamples/second 14-bit analog to digital converters. The system can coadd 256x256 images at over 1000 frames per second in up to 64 different memory positions. Array clocking and sampling is generated from uploaded clocking patterns in two independent memories. This configuration allows the user to quickly create, on the fly, any form of array clocking and sampling (destructive, non-destructive, sample up the ramp, additional reset frames, Fowler, single frames, co-added frames, multi-position chop, throw away frames, etc.) The electronics were designed in a modular fashion so that any number of analog channels from arrays or mosaics of arrays can be accommodated by using the appropriate number of FPGA boards and preamps. The preamp/analog to digital converter boards can be replaced as needed to operate any focal plane array or other sensor. The system also provides analog drive capability for controlling an X-Y chopping secondary mirror, nominal two position chopping, and can also synchronize to an externally driven chop source. Multiple array controllers can be synchronized together, allowing multi-channel systems to share a single chopping secondary, yet clock the focal planes differently from each other. Due to the flexibility of the FPGAs, it is possible to develop highly customized operating modes to maximize system performance or to enable novel observations and applications.

Proceedings Article | 30 September 2004 Paper

Paper

First test results from FORCAST: the facility mid-IR camera for SOFIA

Luke Keller, Terry Herter, Gordon Stacey, George Gull, Justin Schoenwald, Bruce Pirger, Joseph Adams, Marc Berthoud, Thomas Nikola

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.552333

KEYWORDS: Cameras, Optical filters, Telescopes, Mirrors, Detector arrays, Staring arrays, Sensors, Space telescopes, Distortion, Image filtering

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Proceedings Article | 29 September 2004 Paper

Paper

Testing of mid-infrared detector arrays for FORCAST

Joseph Adams, Terry Herter, Luke Keller, George Gull, Bruce Pirger, Justin Schoenwald, Marc Berthoud

Proceedings Volume 5499, (2004) https://doi.org/10.1117/12.551490

KEYWORDS: Sensors, Detector arrays, Electronics, Multiplexers, Telescopes, Cameras, Mid-IR, Optical filters, Infrared sensors, Infrared cameras

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Proceedings Article | 3 March 2003 Paper

Paper

Forcast: the Faint Object Infared Camera for the SOFIA telescope

Luke Keller, Terry Herter, Gordon Stacey, George Gull, Justin Schoenwald, Bruce Pirger, Tomas Nikola

Proceedings Volume 4857, (2003) https://doi.org/10.1117/12.458634

KEYWORDS: Cameras, Mirrors, Optical filters, Telescopes, Detector arrays, Distortion, Staring arrays, Space telescopes, Antimony, Infrared cameras

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Proceedings Article | 4 February 2003 Paper

Paper

The Large Atacama Telescope (LAT) project

Terry Herter, Bernhard Brandl, Stephen Eikenberry, Riccardo Giovanelli, Luke Keller, Daniel Lester, Thomas Sebring, Gordon Stacey

Proceedings Volume 4837, (2003) https://doi.org/10.1117/12.457966

KEYWORDS: Telescopes, Mirrors, Mid-IR, Galactic astronomy, Adaptive optics, Imaging spectroscopy, Stars, Space telescopes, Actuators, Point spread functions

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Proceedings Article | 30 January 2002 Paper

Paper

Large-area silicon immersion echelle gratings and grisms for IR spectroscopy

Luke Keller, Daniel Jaffe, Oleg Ershov, Jasmina Marsh

Proceedings Volume 4485, (2002) https://doi.org/10.1117/12.454274

KEYWORDS: Spectral resolution, Spectrographs, Silicon, Diffraction gratings, Telescopes, Cameras, Optical design, Diffraction, Infrared spectroscopy, Mid-IR

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Proceedings Article | 9 November 2001 Paper

Paper

Production of high-order micromachined silicon echelles on optically flat substrates

Oleg Ershov, Daniel Jaffe, Jasmina Marsh, Luke Keller

Proceedings Volume 4440, (2001) https://doi.org/10.1117/12.448052

KEYWORDS: Diffraction gratings, Silicon, Semiconducting wafers, Diffraction, Etching, Prisms, Photomasks, Reactive ion etching, Optical testing, Spectral resolution

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Proceedings Article | 20 June 2000 Paper

Paper

FORCAST: a facility 5- to 40-um camera for SOFIA

Luke Keller, Terry Herter, Gordon Stacey, George Gull, Bruce Pirger, Justin Schoenwald, Harry Bowman, Tomas Nikola

Proceedings Volume 4014, (2000) https://doi.org/10.1117/12.389130

KEYWORDS: Optical filters, Telescopes, Mirrors, Electronics, Cameras, Sensors, Data acquisition, Control systems, Stars, Diffraction

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Proceedings Article | 21 August 1998 Paper

Paper

Micromachined silicon diffraction gratings for infrared spectroscopy

Daniel Jaffe, Luke Keller, Oleg Ershov

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317263

KEYWORDS: Diffraction gratings, Silicon, Etching, Spectral resolution, Diffraction, Infrared spectroscopy, Photoresist materials, Manufacturing, Anisotropic etching, Oxides

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Proceedings Article | 21 August 1998 Paper

Paper

Design for a near-infrared immersion echelle spectrograph: breaking the R=100,000 barrier from 1.5 to 5 um

Luke Keller, Daniel Jaffe, Greg Doppmann

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317312

KEYWORDS: Spectrographs, Silicon, Spectral resolution, Collimators, Near infrared, Optical design, Diffraction gratings, Cameras, Detector arrays, Staring arrays

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Proceedings Article | 1 July 1990 Paper

Paper

Deep thermal infrared capability for the Multiple Mirror Telescope: demands of multimirror telescope technology on infrared instrumentation

Luke Keller, B. Sabol, George Rieke

Proceedings Volume 1235, (1990) https://doi.org/10.1117/12.19085

KEYWORDS: Infrared telescopes, Mirrors, Telescopes, Thermography, Photometry, Infrared radiation, Sensors, Infrared technology, Astronomy, Infrared imaging

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Showing 5 of 22 publications

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