Optical chemical sensor based on multilayer self-assembled thin film sensors for aquaculture process control
US6051437A · kind A · utility
63Cited by
18References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1998 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | May 4, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/772
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Optical chemical probes have layers of anionic and cationic polyelectrolytes and one or more dyes incorporated into these layers. The probes are placed into the medium and the dye or dyes react in the presence of the corresponding chemical. Color changes may be observed manually or by a photo detector. A light source may be employed to increase the optical signal received from the probe. Further, a waveguide may be used to trap multiple optical signals. The invention is used for chemical analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.