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Method and apparatus for the optical measurement of the pressure of a gaseous mixture

  • US 5,459,324 A
  • Filed: 12/06/1994
  • Issued: 10/17/1995
  • Est. Priority Date: 12/10/1993
  • Status: Expired due to Fees
First Claim
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1. Method for the optical determination of the pressure of a gaseous mixture, characterized by the fact that it comprises the stages consisting:

  • of exciting in the infrared range the molecules of a gas of said mixture, from a first vibrational level to a second vibrational level;

    of measuring the duration of the fluorescence of a line of the emission spectrum of said gas from one of the rotational sub-levels of said second vibrational level towards another rotational sub-level of a third vibrational level; and

    of deducing from said duration the pressure of the gaseous mixture.

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