Automatic identification of suspended particles
US7217937B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 2004 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Jul 30, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/6482
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention relates to the automatic analysis and identification of different species of particles in a liquid sample using both fluorescent tagging and magnification techniques. A light source at a first wavelength is used to induce the tagged particles to emit light at a second wavelength, while the image thereof is captured on a pixel array of a digital camera. A second camera can be used to capture an image of the particles illuminated at the first wavelength, which is separated from the second wavelength by an optical filter. Alternatively, a second light source emitting pulses of light at the second wavelength, which alternate with the first light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.