Dr. Alan F. Stewart Profile

Dr. Alan F. Stewart

retired

SPIE Involvement:

Author | Science Fair Judge

Proceedings Article | 15 January 2007 Paper

Optical coatings and surfaces in space: MISSE

Alan Stewart, Miria Finckenor

Proceedings Volume 6403, 64030S (2007) https://doi.org/10.1117/12.695850

KEYWORDS: Contamination, Optical coatings, Reflectivity, Gold, Absorption, Ultraviolet radiation, Adaptive optics, Mirrors, Platinum, Oxygen

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Proceedings Article | 15 January 2007 Paper

Measurement of low-absorption optics by thermal imaging

Alan Stewart, William Hughes

Proceedings Volume 6403, 64031H (2007) https://doi.org/10.1117/12.696277

KEYWORDS: Absorption, Coating, Infrared imaging, Cameras, Thermography, Data modeling, Calibration, Calorimetry, Finite element methods, Infrared cameras

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Proceedings Article | 15 January 2007 Paper

Limits of performance: CW laser damage

Rashmi Shah, Justin Rey, Alan Stewart

Proceedings Volume 6403, 640305 (2007) https://doi.org/10.1117/12.695918

KEYWORDS: Optical coatings, Contamination, Laser induced damage, Continuous wave operation, Absorption, Thermography, Thermal modeling, Data modeling, Particles

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Proceedings Article | 7 February 2006 Paper

Contamination monitoring in a laser system using a surface acoustic wave device

Alan Stewart, Shiv Dass, Kip Kendrick

Proceedings Volume 5991, 59910K (2006) https://doi.org/10.1117/12.637676

KEYWORDS: Sensors, Contamination, Mirrors, Acoustics, Chemical oxygen iodine lasers, Environmental sensing, Laser resonators, Crystals, Laser systems engineering, Chemical lasers

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Proceedings Article | 10 June 2004 Paper

Diagnostic methods for CW laser damage testing

Alan Stewart, Rashmi Shah

Proceedings Volume 5273, (2004) https://doi.org/10.1117/12.524622

KEYWORDS: Data modeling, Optical testing, Absorption, Optical coatings, Thermography, Wavefronts, Diagnostics, Thermal modeling, Distortion, Continuous wave operation

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Proceedings Article | 3 March 2000 Paper

Thermographic profiles on optical surfaces: from insulators to metals

Rashmi Shah, Alan Stewart, Jerry Bettis, Lynn Bonsall

Proceedings Volume 3902, (2000) https://doi.org/10.1117/12.379349

KEYWORDS: Thermography, Silica, Temperature metrology, Aluminum, Thermal modeling, Silicon, Cameras, Data modeling, Coating, Sapphire

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Proceedings Article | 7 April 1999 Paper

Laser damage in multispectral optical coatings for the ABL

Alan Stewart, Lynn Bonsall, Jerry Bettis, James Copland, Keith Healey, Gerald Charlton, William Hughes, Juan Echeverry

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344403

KEYWORDS: Absorption, Laser induced damage, Zerodur, Optical coatings, Reflectivity, RADICL, Silicon, Chemical oxygen iodine lasers, Diffusion, Temperature metrology

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Proceedings Article | 7 April 1999 Paper

Finite element thermal analysis of multispectral coatings for the ABL

Rashmi Shah, Jerry Bettis, Alan Stewart, Lynn Bonsall, James Copland, William Hughes, Juan Echeverry

Proceedings Volume 3578, (1999) https://doi.org/10.1117/12.344391

KEYWORDS: Absorption, Silicon, Zerodur, Diffusion, Temperature metrology, Semiconducting wafers, Optical coatings, Calorimetry, Laser damage threshold, Finite element methods

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Proceedings Article | 28 October 1996 Paper

Kuiper Express: a sciencecraft

David Rodgers, Leon Alkalai, Patricia Beauchamp, Gun-Shing Chen, Michael Chrisp, Robert Brown, J. Davidson, Douglas Huxtable, P. Penzo, Stanley Petrick, Laurence Soderblom, Alan Stewart, Gregg Vane, Roger Yelle

Proceedings Volume 2810, (1996) https://doi.org/10.1117/12.255126

KEYWORDS: Neptune, Uranus, Solar system, Sun, Sensors, Comets, Planets, Antennas, Telecommunications, Solar energy

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The Kuiper Express is a mission to achieve the first reconnaissance of one of the primitive objects that reside in the Kuiper Belt. The objects in the Kuiper Belt are the remnants of the planetesimal swarm that formed the four giant planets of the outer Solar System. These objects, because they are far from the Sun, have not been processed by solar heating and are essentially in their primordial state. This makes them unique objects and their study will provide information on the composition of the solar nebula that cannot be extracted from a study of other objects in the Solar System. The Kuiper Express is a sciencecraft mission. A sciencecraft is an integrated unit that combines into a single system the essential elements (but no more) necessary to achieve the science objectives of the mission, including science instruments, electronics, telecommunications, power, and propulsion. The design of a sciencecraft begins with the definition of mission science objectives and cost constraint. An observational sequence and sensor subsystem are then designed. This sensor subsystem in turn becomes the design driver for the sciencecraft architecture and hardware subsystems needed to deliver the sensor to its target and return the science data to the earth. Throughout the design process, shared functionality, shared redundancy, and reduced cost are strongly emphasized. The Kuiper Express will be launched using a Delta vehicle and will use solar electric propulsion to add velocity and shape its trajectory in the inner Solar System, executing two earth gravity-assist flybys. It will also execute flybys of main belt asteroids, Mars, Uranus, and Neptune/Triton en route to its target in the Kuiper belt, where it will arrive about ten years after launch. It will use no nuclear power. The surface constituents and morphology of the objects visited will be measured and their atmospheres will be characterized. The cost of the detailed design, fabrication, and launch of the Kuiper Express is consistent with the $150M limit set by the NASA Discovery Program.

Showing 5 of 9 publications

Conference Committee Involvement (5)

Boulder Damage Symposium XXXIX: Annual Symposium on Optical Materials for High Power Lasers

24 September 2007 | Boulder, Colorado, United States

Boulder Damage Symposium XXXVIII: Annual Symposium on Optical Materials for High Power Lasers

26 September 2006 | Boulder, Colorado, United States

Boulder Damage Symposium XXXVII: Annual Symposium on Optical Materials for High Power Lasers

19 September 2005 | Boulder, CO, United States

Boulder Damage Symposium XXXVI

20 September 2004 | Boulder, Colorado, United States

XXXIV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium

22 September 2003 | Boulder, Colorado, United States

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