JPS55152441A - Method and device for analyzing correlation - Google Patents
Method and device for analyzing correlationInfo
- Publication number
- JPS55152441A JPS55152441A JP6135479A JP6135479A JPS55152441A JP S55152441 A JPS55152441 A JP S55152441A JP 6135479 A JP6135479 A JP 6135479A JP 6135479 A JP6135479 A JP 6135479A JP S55152441 A JPS55152441 A JP S55152441A
- Authority
- JP
- Japan
- Prior art keywords
- light
- cell
- cells
- ratio
- light source
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title abstract 2
- 230000006866 deterioration Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
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
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE:To reduce interference and influences due to disturbing components, when light from a light source is divided and alternately introduced into a correlation cell and a compensation cell, by providing a light reducing plate at the side of the compensation cell to adjust the ratio between light quantities to both the cells. CONSTITUTION:Light emitted from a light source 1 is divided by a divider 2 and alternately introduced into a correlation cell 4 and a compensation cell 5 by a chopper 3. A light reducing fixed plate 9 or the like is provided to extend across the optical path for the compensation cell 5 to adjust the ratio of light quaitites to both the cells 4, 5. As a result, the signal ratio between light outputs IR, IS from the cells 4, 5 is optically adjusted and the output are alternately passed through a sample cell 6 and received by a detector 8 through a filter 7. The detector 8 converts the each light output into an electrical current. This current is processed by a calculation circuit. According to this method, the influences of the contaimination of the cells, the deterioration of the light source, etc. are eliminated and measurement of NOX or CO concentration or the like can be accurately effected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6135479A JPS55152441A (en) | 1979-05-16 | 1979-05-16 | Method and device for analyzing correlation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6135479A JPS55152441A (en) | 1979-05-16 | 1979-05-16 | Method and device for analyzing correlation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55152441A true JPS55152441A (en) | 1980-11-27 |
Family
ID=13168718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6135479A Pending JPS55152441A (en) | 1979-05-16 | 1979-05-16 | Method and device for analyzing correlation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55152441A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900635A (en) * | 1995-09-29 | 1999-05-04 | Instrumentarium Oy | Correction of collision broadening in non-dispersive absorption measurement of gases |
-
1979
- 1979-05-16 JP JP6135479A patent/JPS55152441A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900635A (en) * | 1995-09-29 | 1999-05-04 | Instrumentarium Oy | Correction of collision broadening in non-dispersive absorption measurement of gases |
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