FR2226897A6 - Gas concentration determination - by illumination of sample with co-axial laser beam and stokes light beam - Google Patents
Gas concentration determination - by illumination of sample with co-axial laser beam and stokes light beamInfo
- Publication number
- FR2226897A6 FR2226897A6 FR7314007A FR7314007A FR2226897A6 FR 2226897 A6 FR2226897 A6 FR 2226897A6 FR 7314007 A FR7314007 A FR 7314007A FR 7314007 A FR7314007 A FR 7314007A FR 2226897 A6 FR2226897 A6 FR 2226897A6
- Authority
- FR
- France
- Prior art keywords
- gas
- sample
- laser
- colinear
- illumination
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005286 illumination Methods 0.000 title 1
- 230000001427 coherent effect Effects 0.000 abstract 3
- 230000003287 optical effect Effects 0.000 abstract 3
- 238000001914 filtration Methods 0.000 abstract 2
- 230000005284 excitation Effects 0.000 abstract 1
- 239000010979 ruby Substances 0.000 abstract 1
- 229910001750 ruby Inorganic materials 0.000 abstract 1
- 230000001960 triggered effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/44—Raman spectrometry; Scattering spectrometry ; Fluorescence spectrometry
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The optical system comprises two superimposed colinear coherent light beams. The first from an impulse laser, partic. a ruby laser, which is triggered synchronously with a second laser, partic. a dye laser. The difference in frequency between the two coherent beams is equal to the excitation frequency of the molecules of the gas to be determined. The superimposed colinear beams are passed through a sample of the gas to analysed in order to generate a Stokes ray which is colinear with the coherent ray. The resulting beam, after optical filtration, is focussed on the discrete point of the gas to be determined, and then the frequency of the resulting anti-Stokes beam which is proportional to the mol-concentration of the gas is made visible by optical filtration and projection on a photographic plate.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00351969A US3802777A (en) | 1972-04-19 | 1973-04-17 | Gas concentration measurement device using stimulated raman scattering |
| FR7314007A FR2226897A6 (en) | 1973-04-17 | 1973-04-17 | Gas concentration determination - by illumination of sample with co-axial laser beam and stokes light beam |
| DE2320166A DE2320166C3 (en) | 1972-04-19 | 1973-04-19 | Device for the investigation of a molecular gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7314007A FR2226897A6 (en) | 1973-04-17 | 1973-04-17 | Gas concentration determination - by illumination of sample with co-axial laser beam and stokes light beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2226897A6 true FR2226897A6 (en) | 1974-11-15 |
Family
ID=9118124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7314007A Expired FR2226897A6 (en) | 1972-04-19 | 1973-04-17 | Gas concentration determination - by illumination of sample with co-axial laser beam and stokes light beam |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2226897A6 (en) |
-
1973
- 1973-04-17 FR FR7314007A patent/FR2226897A6/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CL | Concession to grant licenses | ||
| RL | Notice of termination of a license | ||
| CL | Concession to grant licenses |