Particle measurement apparatus flow cell useful for sample fluids having different refractive indexes
US6465802B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 17, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/0205
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flow cell for obtaining information on particles suspended in sample fluid, wherein an irradiation region M is defined in the flow cell for functioning as a particle detection portion to be irradiated with a laser beam La, and a wall portion of the flow cell is so adapted and arranged that the laser beam La becomes incident upon an outer wall surface of the flow cell 1 at a predetermined angle &thgr;1 (&thgr;1≠0°) and exits from an inner wall surface 5b of the flow cell 1 into the sample fluid 6 at a refraction angle 0°.Further the wall portion 5 of the flow cell 1 is so arranged that the laser beam La becomes incident upon a boundary surface between the sample fluid and the opposite inner wall surface of the flow cell 1 at a predetermined incident angle &agr; (&agr;≠0°) after being incident upon the sample fluid and passing through the irradiation region M.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.