Laser oscillator and light scattering particle detector using the same
US6813303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2002 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/53
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to the present invention, there is provided a light scattering type particle detector, using a semiconductor laser as a light source, for detecting particles contained in sample fluid which defines a flow path, wherein laser light generated from the semiconductor laser is irradiated to irradiate a region of the flow path with a concave mirror and thereby a particle detecting region is defined.According to the present invention, there is also provided a laser oscillator wherein the optical axis of a semiconductor laser for generating pumping laser light has a predetermined angle with respect to the optical axis of a laser medium for irradiating laser light by pumping. Using such a laser oscillator, laser light irradiated from the laser oscillator is condensed to irradiate a region of a flow path defined by sample fluid, and thereby a particle detecting region is defined. Particles contained in the particle detecting region are detected by receiving scattered light with a light receiving portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.