GB1113986A - Improvements in or relating to fluid analysis - Google Patents
Improvements in or relating to fluid analysisInfo
- Publication number
- GB1113986A GB1113986A GB2544864A GB2544864A GB1113986A GB 1113986 A GB1113986 A GB 1113986A GB 2544864 A GB2544864 A GB 2544864A GB 2544864 A GB2544864 A GB 2544864A GB 1113986 A GB1113986 A GB 1113986A
- Authority
- GB
- United Kingdom
- Prior art keywords
- laser
- analyser
- gas
- beams
- radiation
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
1,113,986. Lasers. HILGER-I.R.D. Ltd. 16 Sept., 1965 [19 June, 1964], No. 25448/64. Heading H1C. [Also in Division G1] An infra-red absorption analyser uses a laser as radiation source. A simple monobeam analyser is described with reference to Fig. 1 (not shown). In a twin-beam analyser for testing for CH 2 or CH 3 groups, Fig. 2, 3.39 Á radiation from opposite ends of a He-Ne gas laser passes through sample and reference chambers 26, 28 to detectors 32 of the type filled with the gas to be detected. The detector outputs are connected in opposition and the difference is displayed on the meter 36. Optical wedges 38 are provided; one for zero setting, the other for null balance operation, which may be automatic. The laser output may be modulated by pulsing the supply, tilting the laser or its mirrors or chopping the emerging beams. In a modification, Fig. 3 (not shown), the radiation beams after passing through the sample and reference chambers fall on the two gas chambers of a differential capacitor-type detector. In another modification, Fig. 4 (not shown), the beams are chopped in antiphase and fall on a single detector. The analyser may be used to detect small quantities of ethyl alcohol in exhaled air, or oil in water, and the type of laser, solid or gas, and its material is chosen to give a wavelength in the desired absorption band.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2544864A GB1113986A (en) | 1964-06-19 | 1964-06-19 | Improvements in or relating to fluid analysis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2544864A GB1113986A (en) | 1964-06-19 | 1964-06-19 | Improvements in or relating to fluid analysis |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1113986A true GB1113986A (en) | 1968-05-15 |
Family
ID=10227839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2544864A Expired GB1113986A (en) | 1964-06-19 | 1964-06-19 | Improvements in or relating to fluid analysis |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1113986A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732017A (en) * | 1970-10-23 | 1973-05-08 | Bendix Corp | Gas analyzer utilizing a tunable laser with a reference substance in the laser cavity |
EP0072222A1 (en) * | 1981-08-07 | 1983-02-16 | Mathematical Sciences Northwest, Inc. | Method and apparatus for analyzing the hydrocarbon components of a gas sample by measuring laser beam absorption |
-
1964
- 1964-06-19 GB GB2544864A patent/GB1113986A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3732017A (en) * | 1970-10-23 | 1973-05-08 | Bendix Corp | Gas analyzer utilizing a tunable laser with a reference substance in the laser cavity |
EP0072222A1 (en) * | 1981-08-07 | 1983-02-16 | Mathematical Sciences Northwest, Inc. | Method and apparatus for analyzing the hydrocarbon components of a gas sample by measuring laser beam absorption |
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