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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Glenn D. Boreman
  • Vol. 44, Iss. 31 — Nov. 1, 2005
  • pp: 6578–6592

Toward in-cylinder absorption tomography in a production engine

Paul Wright, Charles A. Garcia-Stewart, Stephen J. Carey, Francis P. Hindle, Stephen H. Pegrum, Stephen M. Colbourne, Paul J. Turner, William J. Hurr, Tim J. Litt, Stuart C. Murray, Sam D. Crossley, Krikor B. Ozanyan, and Hugh McCann  »View Author Affiliations


Applied Optics, Vol. 44, Issue 31, pp. 6578-6592 (2005)
http://dx.doi.org/10.1364/AO.44.006578


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Abstract

Design requirements for an 8000 frame/s dual-wavelength ratiometric chemical species tomography system, intended for hydrocarbon vapor imaging in one cylinder of a standard automobile engine, are examined. The design process is guided by spectroscopic measurements on iso-octane and by comprehensive results from laboratory phantoms and research engines, including results on temporal resolution performance. Novel image reconstruction techniques, necessary for this application, are presented. Recent progress toward implementation, including details of the optical access arrangement employed and signal-to-noise issues, is described. We present first cross-cylinder IR absorption measurements from a reduced channel-count (nontomographic) system and discuss the prospects for imaging.

© 2005 Optical Society of America

OCIS Codes
(100.6950) Image processing : Tomographic image processing
(110.3080) Imaging systems : Infrared imaging
(120.1740) Instrumentation, measurement, and metrology : Combustion diagnostics
(300.6260) Spectroscopy : Spectroscopy, diode lasers

Citation
Paul Wright, Charles A. Garcia-Stewart, Stephen J. Carey, Francis P. Hindle, Stephen H. Pegrum, Stephen M. Colbourne, Paul J. Turner, William J. Hurr, Tim J. Litt, Stuart C. Murray, Sam D. Crossley, Krikor B. Ozanyan, and Hugh McCann, "Toward in-cylinder absorption tomography in a production engine," Appl. Opt. 44, 6578-6592 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-31-6578

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