JPH03128841U - - Google Patents
Info
- Publication number
- JPH03128841U JPH03128841U JP2416190U JP2416190U JPH03128841U JP H03128841 U JPH03128841 U JP H03128841U JP 2416190 U JP2416190 U JP 2416190U JP 2416190 U JP2416190 U JP 2416190U JP H03128841 U JPH03128841 U JP H03128841U
- Authority
- JP
- Japan
- Prior art keywords
- air
- light emitting
- light receiving
- light
- duct
- 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 claims description 3
- 238000003915 air pollution Methods 0.000 claims 1
- 239000000356 contaminant Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 1
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2416190U JPH03128841U (no) | 1990-03-09 | 1990-03-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2416190U JPH03128841U (no) | 1990-03-09 | 1990-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03128841U true JPH03128841U (no) | 1991-12-25 |
Family
ID=31527132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2416190U Pending JPH03128841U (no) | 1990-03-09 | 1990-03-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03128841U (no) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01102746A (ja) * | 1987-10-16 | 1989-04-20 | Hitachi Ltd | 光ディスク記録再生装置 |
-
1990
- 1990-03-09 JP JP2416190U patent/JPH03128841U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01102746A (ja) * | 1987-10-16 | 1989-04-20 | Hitachi Ltd | 光ディスク記録再生装置 |