Dr. Alan T. Tokunaga Profile

Dr. Alan T. Tokunaga

Astronomer Emeritus

SPIE Involvement:

Author

Publications (32)

Proceedings Article | 9 August 2016 Paper

iSHELL: a construction, assembly and testing

John Rayner, Alan Tokunaga, Dan Jaffe, Morgan Bonnet, Greg Ching, Mike Connelley, Dan Kokubun, Charles Lockhart, Eric Warmbier

Proceedings Volume 9908, 990884 (2016) https://doi.org/10.1117/12.2232064

KEYWORDS: Spectrographs, Optical benches, Spectral resolution, Calibration, Mirrors, Telescopes, Aluminum, Lamps, Silicon, Optical alignment

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Proceedings Article | 24 September 2012 Paper

Key science drivers for MICHI: a mid-IR instrument concept for the TMT

Chris Packham, M. Honda, M. Richter, Y. Okamoto, H. Kataza, T. Onaka, T. Fujiyoshi, A. Tokunaga, M. Chun, A. Alonso-Herrero, J. Carr, M. Chiba, K Enya, H. Fujiwara, P Gandhi, M. Imanishi, K. Ichikawa, Y. Ita, N. Kawakatsu, T. Kotani, N. Levenson, T. Matsuo, M. Matsuura, T. Minezaki, J. Najita, N. Oi, T. Ootsubo, I. Sakon, M. Takami, C. Telesco, C. Wright, T. Yamashita

Proceedings Volume 8446, 84467G (2012) https://doi.org/10.1117/12.924996

KEYWORDS: Stars, Planets, Galactic astronomy, Spatial resolution, Telescopes, Spectroscopy, James Webb Space Telescope, Adaptive optics, Spectral resolution, Thirty Meter Telescope

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Proceedings Article | 24 September 2012 Paper

iSHELL: a 1-5 micron cross-dispersed R=70,000 immersion grating spectrograph for IRTF

John Rayner, Tim Bond, Morgan Bonnet, Dan Jaffe, Gary Muller, Alan Tokunaga

Proceedings Volume 8446, 84462C (2012) https://doi.org/10.1117/12.925511

KEYWORDS: Spectrographs, Spectral resolution, Mirrors, Telescopes, Calibration, Silicon, Sensors, Cameras, Infrared radiation, Optical filters

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Proceedings Article | 4 August 2010 Paper

New phase compensating secondary mirrors for the NASA Infrared Telescope Facility

Eric Tollestrup, Alan Tokunaga

Proceedings Volume 7733, 77331K (2010) https://doi.org/10.1117/12.858071

KEYWORDS: Mirrors, Monochromatic aberrations, Polishing, Telescopes, Image quality, Wavefronts, Surface finishing, Infrared telescopes, Adaptive optics, Ion beams

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Proceedings Article | 21 July 2010 Paper

The science drivers for a mid-infrared instrument for the TMT

Y. Okamoto, C. Packham, A. Tokunaga, M. Honda, I. Sakon, J. Carr, M. Chiba, M. Chun, H. Fujiwara, T. Fujiyoshi, M. Imanishi, Y. Ita, H. Kataza, N. Levenson, M. Matsuura, T. Minezaki, J. Najita, T. Onaka, T. Ootsubo, M. Richter, M. Takami, C. Telesco, C. Wright, T. Yamashita

Proceedings Volume 7735, 77355O (2010) https://doi.org/10.1117/12.856670

KEYWORDS: Stars, Planets, Telescopes, Spatial resolution, Spectroscopy, Galactic astronomy, Astronomy, Molecules, Mid-IR, Thirty Meter Telescope

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Proceedings Article | 15 July 2010 Paper

Design concepts for a mid-infrared instrument for the Thirty-Meter Telescope

A. Tokunaga, C. Packham, Y. Okamoto, H. Kataza, M. Richter, J. Carr, M. Chun, C. Telesco, M. Honda, J. Najita, T. Onaka, I. Sakon, T. Yamashita

Proceedings Volume 7735, 77352C (2010) https://doi.org/10.1117/12.856775

KEYWORDS: Mirrors, Spectroscopy, Mid-IR, Spectrographs, Polarimetry, Relays, Staring arrays, Imaging systems, Cameras, Thirty Meter Telescope

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Proceedings Article | 9 July 2008 Paper

Silicon immersion grating spectrograph design for the NASA Infrared Telescope Facility

A. Tokunaga, T. Bond, D. Jaffe, M. Mumma, J. Rayner, E. Tollestrup, D. Warren

Proceedings Volume 7014, 70146A (2008) https://doi.org/10.1117/12.788253

KEYWORDS: Spectrographs, Spectral resolution, Infrared radiation, Silicon, Infrared telescopes, Infrared spectroscopy, Planets, Stars, L band, Optical design

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Proceedings Article | 29 June 2006 Paper

Design of the TMT mid-infrared echelle: science drivers and design overview

J. Elias, J. Carr, M. Richter, J. Najita, M. Chun, A. Tokunaga, M. Liu, J. Lacy, S. Strom, M. Liang, T. Bond

Proceedings Volume 6269, 62693U (2006) https://doi.org/10.1117/12.670439

KEYWORDS: Mid-IR, Planets, Molecules, Telescopes, Adaptive optics, Stars, Spectrographs, Spectral resolution, Solar system, Planetary systems

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Proceedings Article | 29 June 2006 Paper

Design tradeoffs for a high spectral resolution mid-infrared echelle spectrograph on the Thirty-Meter Telescope

A. Tokunaga, T. Bond, J. Elias, M. Chun, M. Richter, M. Liang, J. Lacy, L. Daggert, E. Tollestrup, M. Ressler, D. Warren, S. Fisher, J. Carr

Proceedings Volume 6269, 62693Y (2006) https://doi.org/10.1117/12.670169

KEYWORDS: Spectrographs, Cameras, Telescopes, Mid-IR, Sensors, Spectral resolution, Adaptive optics, Mirrors, Optical instrument design, Thirty Meter Telescope

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Proceedings Article | 29 June 2006 Paper

Preliminary optical design for the TMT mid-infrared adaptive optics system and echelle spectrograph

Ming Liang, J. Elias, A. Tokunaga, M. Chun, M. Richter, L. Daggert, T. Bond

Proceedings Volume 6269, 626943 (2006) https://doi.org/10.1117/12.670463

KEYWORDS: Cameras, Relays, Mirrors, Mid-IR, Spectrographs, Adaptive optics, Telescopes, Sensors, Optical design, Monochromatic aberrations

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Proceedings Article | 27 June 2006 Paper

MIRAO: a mid-IR adaptive optics system design for TMT

Mark Chun, Jay Elias, Brent Ellerbroek, Tim Bond, Ming Liang, Richard Clare, Alan Tokunaga, Matt Richter, Larry Daggert

Proceedings Volume 6272, 62720S (2006) https://doi.org/10.1117/12.670062

KEYWORDS: Adaptive optics, Relays, Telescopes, Mid-IR, Laser guide stars, Mirrors, Stars, Near infrared, Wavefronts, Space telescopes

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Proceedings Article | 20 October 2004 Paper

'OHANA

Guy Perrin, Olivier Lai, Julien Woillez, Jean Guerin, Takayuki Kotani, Sebastien Vergnole, Andrew Adamson, Christ Ftaclas, Olivier Guyon, Pierre Lena, Jun Nishikawa, Francois Reynaud, Katherine Roth, Stephen Ridgway, Alan Tokunaga, Peter Wizinowich

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551585

KEYWORDS: Optical fibers, Telescopes, Interferometers, Single mode fibers, K band, Interferometry, Gemini Observatory, Space telescopes, Dispersion, Glasses

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Proceedings Article | 30 September 2004 Paper

Performance update of the infrared camera and spectrograph for the Subaru Telescope (IRCS)

Hiroshi Terada, Naoto Kobayashi, Alan Tokunaga, Tae-Soo Pyo, Ko Nedachi, Mark Weber, Robert Potter, Peter Onaka

Proceedings Volume 5492, (2004) https://doi.org/10.1117/12.552516

KEYWORDS: Spectrographs, Telescopes, Adaptive optics, Spectroscopy, Cameras, Imaging spectroscopy, Infrared cameras, Infrared telescopes, K band, Imaging systems

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Proceedings Article | 7 March 2003 Paper

Infrared camera and spectrograph for the Subaru Telescope: performance improvement with the new Aladdin-III array

Hiroshi Terada, Naoto Kobayashi, Alan Tokunaga, Tae-Soo Pyo, Miwa Goto, Mark Weber, Robert Potter, Peter Onaka

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.460404

KEYWORDS: Spectrographs, Cameras, Imaging spectroscopy, Telescopes, Infrared cameras, Signal to noise ratio, Spectroscopy, Astronomy, Astronomical telescopes, Infrared imaging

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Proceedings Article | 7 March 2003 Paper

The Redstar3 array controller: embedding Linux and PCs as a DSP replacement

Peter Onaka, Charles Lockhart, Alan Tokunaga, John Rayner, Douglas Toomey, Gregory Ching

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461186

KEYWORDS: Digital signal processing, Data storage, Electronics, Interfaces, Human-machine interfaces, Control systems, Telecommunications, Infrared radiation, Control systems design, Data processing

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Proceedings Article | 7 March 2003 Paper

The Mauna Kea Observatories near-infrared filter set for 1-5 µm

Alan Tokunaga, Douglas Simons

Proceedings Volume 4841, (2003) https://doi.org/10.1117/12.461441

KEYWORDS: Observatories, Optical filters, Astronomy, Optical filtering, Gemini Observatory, Telescopes, Sensors, Astronomical telescopes, Bandpass filters, Adaptive optics

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Proceedings Article | 21 February 2003 Paper

OHANA Phase III: scientific operation of an 800-meter Mauna Kea interferometer

Olivier Lai, Stephen Ridgway, Pierre Lena, Guy Perrin, Gregory Fahlman, Andrew Adamson, Alan Tokunaga, Jun Nishikawa, Peter Wizinowich, Francois Rigaut

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459740

KEYWORDS: Telescopes, Observatories, Interferometry, Astronomy, Data modeling, Astronomical imaging, Interferometers, Infrared telescopes, Infrared radiation, Astronomical telescopes

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Once the proof of concept of the OHANA Array has been demonstrated, the Phase II capabilities can be put into regular science operation, and the OHANA facility can be upgraded to extend interferometric operation to include all of the telescopes of the OHANA Consortium member observatories. This will constitute the Phase III of OHANA. The technical developments required will be relatively straight-forward. Longer fiber sets will be procured (fiber losses are not a limiting factor at the OHANA scale). An enhanced delay line capability will be needed in order to exploit longer baselines with good sky coverage and ample super-synthesis (several compact, multi-pass long optical delay concepts are under investigation). The scheduling and operation modes of an instrument such as OHANA present interesting opportunities and complications. We envision a place for both collaborative consortium science, based on mutual allocation of facility access, and PI-driven access, based on telescope access exchange between consortium members. The most potentially successful mode of operation would imply a community driven model, open to proposals from the different time allocation comittees. This poster looks at possible methods of allocation and operation, inspired by the UKIRT infrared survey (UKIDSS), the European VLBI, and the very interesting possibility of a Mauna Kea telescope time exchange scheme. The issue of data property is of course intimately tied with the proposal/operation system, and means of data availability and distribution are discussed, along with data interpretation tools, which may be modeled on existing systems such as the ISC at Caltech or the JMMC in France. when weighed against the UV coverage, the potential science and the uniqueness of this project, all these issues are worth an in depth study. Discussions are starting as to an OHANA Operation Committee, the goal of which would be to discuss, define and eventually carry out operational modes. The goal, of course, is for the Operation Committee to handle the details of multi-telescope scheduling in a way that will be transparent to the scientist who merely seeks the observational results.

Proceedings Article | 21 February 2003 Paper

OHANA phase II: a prototype demonstrator of fiber-linked interferometry between very large telescopes

Guy Perrin, Olivier Lai, Julien Woillez, Jean Guerin, Francois Reynaud, Stephen Ridgway, Pierre Lena, Peter Wizinowich, Alan Tokunaga, Jun Nishikawa, Francois Rigaut, Andrew Adamson, Olivier Guyon

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459382

KEYWORDS: Telescopes, Interferometers, Astronomy, Single mode fibers, Space telescopes, Prototyping, Interferometry, Astronomical imaging, Gemini Observatory, Large telescopes

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Proceedings Article | 7 February 2003 Paper

Spectroscopy with adaptive optics: spectral slope variations

Miwa Goto, Yutaka Hayano, Naoto Kobayashi, Hiroshi Terada, Tae-Soo Pyo, Alan Tokunaga, Hideki Takami, Naruhisa Takato, Yosuke Minowa, Wolfgang Gaessler, Masanori Iye

Proceedings Volume 4839, (2003) https://doi.org/10.1117/12.459251

KEYWORDS: Adaptive optics, Spectroscopy, Stars, Point spread functions, Calibration, Wavefronts, Telescopes, Binary data, Absorption, Spectrographs

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Proceedings Article | 16 August 2000 Paper

IRCS: infrared camera and spectrograph for the Subaru Telescope

Naoto Kobayashi, Alan Tokunaga, Hiroshi Terada, Miwa Goto, Mark Weber, Robert Potter, Peter Onaka, Gregory Ching, Tony Young, Kent Fletcher, Douglas Neil, Louis Robertson, Daniel Cook, Masatoshi Imanishi, David Warren

Proceedings Volume 4008, (2000) https://doi.org/10.1117/12.395423

KEYWORDS: Telescopes, Spectrographs, Cameras, Adaptive optics, Spectroscopy, Infrared cameras, Imaging spectroscopy, Optical filters, Cryogenics, Spectral resolution

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Proceedings Article | 29 June 2000 Paper

NPT: a large-aperture telescope for high dynamic range astronomy

Robert Joseph, Jeff Kuhn, Alan Tokunaga, Roy Coulter, Christ Ftaclas, J. Elon Graves, Charles Hull, D. Jewitt, Donald Mickey, Gilberto Moretto, Doug Neill, Malcolm Northcott, Claude Roddier, Francois Roddier, Walter Siegmund, Tobias Owen

Proceedings Volume 4005, (2000) https://doi.org/10.1117/12.390156

KEYWORDS: Telescopes, Solar system, Stars, Astronomy, Adaptive optics, Astronomical telescopes, Exoplanets, Mirrors, High dynamic range imaging, Coronagraphy

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Proceedings Article | 21 August 1998 Paper

Infrared camera and spectrograph for the Subaru Telescope

Alan Tokunaga, Naoto Kobayashi, James Bell, Gregory Ching, Klaus-Werner Hodapp, Joseph Hora, Doug Neill, Peter Onaka, John Rayner, Louis Robertson, David Warren, Mark Weber, Tony Young

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317277

KEYWORDS: Cameras, Spectrographs, Telescopes, Adaptive optics, Mirrors, Infrared cameras, Infrared radiation, Spectral resolution, Sensors, Optical filters

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Proceedings Article | 21 August 1998 Paper

Test and selection of Aladdin II arrays for IRCS: Redline electronics for IRCS

Peter Onaka, Alan Tokunaga, Naoto Kobayashi, Mark Weber, John Rayner, Anthony Denault, Darryl Watanabe, Gregory Ching

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317316

KEYWORDS: Electronics, Telescopes, Multiplexers, Astronomy, Astronomical telescopes, Infrared cameras, Infrared radiation, Infrared astronomy, Infrared imaging, Aluminum

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Proceedings Article | 21 August 1998 Paper

Design of the cryogenic wheel mechanisms for IRCS and NIRI

James Bell, Jeffrey Douglass, Klaus-Werner Hodapp, Naoto Kobayashi, Louis Robertson, Alan Tokunaga, Tony Young

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317235

KEYWORDS: Optical filters, Spectrographs, Prisms, Content addressable memory, Prototyping, Optical components, Cameras, Beam steering, Cryogenics, Contamination

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Proceedings Article | 21 August 1998 Paper

Precision slit design and fabrication for the Subaru IRCS instrument

Tony Young, Alan Tokunaga, Joseph Hora, Louis Robertson, Naoto Kobayashi

Proceedings Volume 3354, (1998) https://doi.org/10.1117/12.317317

KEYWORDS: Reflectivity, Mirrors, Polishing, Tungsten, Infrared cameras, Chromium, Spectrographs, Materials processing, Sapphire, Cryogenics

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Proceedings Article | 21 March 1997 Paper

Infrared instrumentation for the Subaru Telescope

Tetsuo Nishimura, Saeko Hayashi, Noriyuki Kaifu, Naoto Kobayashi, Yukiyasu Kobayashi, Motohide Tamura, Hideki Takami, Tadafumi Takata, T. Yamashita, Hirokazu Kataza, Toshihiko Tanabe, Y. Ito, Takashi Miyata, A. Mori, Takashi Onaka, Daigo Tomono, Koji Murakawa, Hiroshi Shibai, Tetsuya Nagata, Fumihide Iwamuro, Toshinori Maihara, Kentaro Motohara, Shin Oya, Hiroyuki Tsukamoto, Lennox Cowie, Donald Hall, Klaus-Werner Hodapp, Joseph Hora, John Rayner, Alan Tokunaga

Proceedings Volume 2871, (1997) https://doi.org/10.1117/12.268992

KEYWORDS: Spectrographs, Infrared telescopes, Telescopes, Infrared radiation, Cameras, Imaging systems, Adaptive optics, Mirrors, Infrared astronomy, Space telescopes

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Proceedings Article | 1 June 1994 Paper

OH airglow suppressor for the SUBARU Telescope: OHS for SUBARU

Toshinori Maihara, Fumihide Iwamuro, Shin Oya, Hiroyuki Tsukamoto, Donald Hall, Lennox Cowie, Alan Tokunaga, Andrew Pickles

Proceedings Volume 2198, (1994) https://doi.org/10.1117/12.176748

KEYWORDS: Telescopes, Cameras, Spectrographs, Airglow, Spectroscopy, Mirrors, Prototyping, Spectral resolution, Spectroscopes, Optical filters

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Proceedings Article | 1 June 1994 Paper

Infrared camera and spectrograph for the SUBARU Telescope

Alan Tokunaga, Klaus-Werner Hodapp, Joseph Hora, John Rayner, Yukiyasu Kobayashi, Toshinori Maihara, Tetsuya Nagata, Naomichi Kobayashi

Proceedings Volume 2198, (1994) https://doi.org/10.1117/12.176756

KEYWORDS: Cameras, Spectrographs, Telescopes, Adaptive optics, Infrared cameras, Prisms, Imaging spectroscopy, Stars, Space telescopes, Lenses

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Proceedings Article | 20 October 1993 Paper

CSHELL: a high spectral resolution 1-5 um cryogenic echelle spectrograph for the IRTF

Thomas Greene, Alan Tokunaga, Douglas Toomey, Jonathan Carr

Proceedings Volume 1946, (1993) https://doi.org/10.1117/12.158684

KEYWORDS: Spectral resolution, Computing systems, Electronics, Mirrors, Cryogenics, Spectrographs, Telescopes, Control systems, Collimators, Sensors

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Proceedings Article | 20 October 1993 Paper

OH airglow suppressor spectrograph: design and prospects

Toshinori Maihara, Fumihide Iwamuro, Donald Hall, Lennox Cowie, Alan Tokunaga, Andrew Pickles

Proceedings Volume 1946, (1993) https://doi.org/10.1117/12.158709

KEYWORDS: Mirrors, Cameras, Spectrographs, Spectroscopy, Airglow, Telescopes, Spherical lenses, Infrared detectors, Image quality, Prototyping

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Proceedings Article | 1 October 1993 Paper

Curvature-based adaptive optics instrument for the UH 2.2-m telescope

Malcolm Northcott, Kevin Jim, J. Elon Graves, Gerard Luppino, Timothy Keller, Andrew Pickles, Alan Tokunaga

Proceedings Volume 2019, (1993) https://doi.org/10.1117/12.157829

KEYWORDS: Adaptive optics, Charge-coupled devices, Telescopes, Space telescopes, Wavefront sensors, Sensors, CCD image sensors, Mirrors, Signal to noise ratio, Infrared sensors

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Proceedings Article | 1 July 1990 Paper

Design for a 1--5-um cryogenic echelle spectrograph for the NASA IRTF

Alan Tokunaga, Douglas Toomey, Jonathan Carr, Donald Hall, Harland Epps

Proceedings Volume 1235, (1990) https://doi.org/10.1117/12.19082

KEYWORDS: Mirrors, Cryogenics, Spectrographs, Collimators, Astronomy, Telescopes, Optical design, Optical filters, Spectral resolution, Relays

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Showing 5 of 32 publications

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