Compact analyzer with spatial modulation and multiple intensity modulated excitation sources
US9029800B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2011 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Jul 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0691
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A compact analyzer includes a flow cell having a flow channel through which a sample is made to pass. First and second light sources are arranged to emit first and second excitation light into first and second overlapping portions of the flow channel, respectively. The first excitation light stimulates a first light emission from particles of a first particle type that may be present in the sample; the second excitation light stimulates a second light emission from particles of a second particle type. A detector receives the first and second light emission from the corresponding particles present in the sample in a detection portion of the flow channel, and provides a detector output based on the received light emission. The light sources are modulated at different frequencies so that a frequency analysis of the detector output can provide separate information about the first and second particle types.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.