JPS6413435A - Particulate measuring instrument - Google Patents
Particulate measuring instrumentInfo
- Publication number
- JPS6413435A JPS6413435A JP62169077A JP16907787A JPS6413435A JP S6413435 A JPS6413435 A JP S6413435A JP 62169077 A JP62169077 A JP 62169077A JP 16907787 A JP16907787 A JP 16907787A JP S6413435 A JPS6413435 A JP S6413435A
- Authority
- JP
- Japan
- Prior art keywords
- stray light
- detection
- cell
- kinds
- removing means
- 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
- 238000001514 detection method Methods 0.000 abstract 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000003449 preventive effect Effects 0.000 abstract 1
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE:To detect particulates of smaller size efficiently at a large flow rate by arranging >=2 kinds of stray light removing means in a detection cell. CONSTITUTION:Slit 50 and 52 are arranged in the detection optical system path of a detection cell 40 where a photodetector 30 for detecting scattered light is arranged, a corrugated wall surface part 60 is formed partially, and a reflection preventive coating 70 is arranged at least at part of it. In this case, >=2 kinds of stray light removing means are used in combination in the cell 40. Consequently, light beams (b) and (c) among stray light components shown by a dotted line are removed, but it is difficult to remove a stray light component (a) which is incident directly on the detector 30 from a point R. Therefore, even if stray light is generated, it can be removed as much as possible, so the S/N ratio of a detection signal can be improved by reducing a noise level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62169077A JPS6413435A (en) | 1987-07-07 | 1987-07-07 | Particulate measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62169077A JPS6413435A (en) | 1987-07-07 | 1987-07-07 | Particulate measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413435A true JPS6413435A (en) | 1989-01-18 |
Family
ID=15879897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62169077A Pending JPS6413435A (en) | 1987-07-07 | 1987-07-07 | Particulate measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413435A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020020706A (en) * | 2018-08-02 | 2020-02-06 | 株式会社島津製作所 | Light scattering detection device |
-
1987
- 1987-07-07 JP JP62169077A patent/JPS6413435A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020020706A (en) * | 2018-08-02 | 2020-02-06 | 株式会社島津製作所 | Light scattering detection device |
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