Microdischarge detector method and apparatus

Measuring and testing – Gas analysis – Gas chromatography

Reexamination Certificate

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C073S023400, C073S023410

Reexamination Certificate

active

07401497

ABSTRACT:
A differential microdischarge detector system. The system comprises two microdischarge detectors (MDDs). One of the MDDs is connected to receive sample analytes to be measured, while the other MDD is connected to receive a reference sample that contains interfering gases and none or a much lower concentration of the sample analytes to be measured. The outputs of the two MDD's are fed to a circuit that generates either a difference or a ratio between the measurements of the two MDDs. In addition, the current, impedance or voltage across the electrodes of the two MDDs may be measured and processed to generate either a difference or a ratio signal, thus obtaining additional information about the sample gas analytes.

REFERENCES:
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patent: 5166755 (1992-11-01), Gat
patent: 2005/0142662 (2005-06-01), Bonne
patent: 2005/0148270 (2005-07-01), Eden et al.
patent: 2344212 (2000-05-01), None
patent: 2004-37978 (2004-05-01), None
patent: WO-0244698 (2002-06-01), None
patent: WO-2005066620 (2005-07-01), None
“Microdischarge Arrays: A New Family of Photonic Devices (Revised*)” S.-J. Park et al. IEEE Journal on Selected Topics in Quantum Electronics, vol. 8, No. 2, Mar./Apr. 2002, pp. 387-394.
“Arrays of Silicon Microdischarge Devices with Multicomponent Dielectrics” S.-J. Park et al. Optic Letters, vol. 26, No. 22, Nov. 15, 2001, pp. 1773-1775.
“Photodetection in the Visible, Ultraviolet, and Near-Infrared with Silicon Microdischarge Devices” S.-J. Park et al. Applied Physics Letters vol. 81, No. 24, Dec. 9, 2002, pp. 4529-4531.
Home page of OceanOptics.com dated Feb. 22, 2006.

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