Optics: measuring and testing – For light transmission or absorption – Of fluent material
Patent
1997-03-25
1999-04-06
Font, Frank G.
Optics: measuring and testing
For light transmission or absorption
Of fluent material
372 98, H01S 3113, G01N 2100
Patent
active
058925864
ABSTRACT:
The invention relates to a remote gas detection process comprising: the emission of a first radiation (4), at at least one absorption wavelength for the gas to be detected, with the aid of a first switched microlaser, in the direction of a test area (6), the production of a first signal (S), representative of the radiation quantity scattered by said gas in response to the interaction between the molecules or atoms of said gas and said first radiation. The invention also relates to an apparatus for performing this process.
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Shimose, et al., Remote Sensing of Methane Gas by Differential Absorption Measurement Using a Wavelength Tunable DFB LD, IEEE Photonics Technology Letters, vol. 3, No. 1, Jan. 1991, pp. 86-87.
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Ferrand Bernard
Molva Engin
Thony Philippe
Commissariat a l''Energie Atomique
Font Frank G.
Smith Zandra V.
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