Reflector for the laser beam of a particle analyzer
US4281924A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1979 |
| Grant date | Aug 4, 1981 |
| Priority date | — |
| Expiry date | Jan 24, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/1459
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for illuminating particles, wherein a source of illumination provides a beam of illuminating radiation which perpendicularly intersects a stream of liquid having the particles suspended therein. The illuminator apparatus comprises a concave reflector surface having a center of curvature and an optical axis which is disposed perpendicularly relative to the stream and with the beam being positioned thereon. The stream of liquid defines a cylindrical lens having a focus positioned at the center of curvature. In operation, the illuminating radiation illuminates the particles, is refracted by the stream so as to converge to a focus, passes from that focus to a concave reflector surface, and reflects from the concave reflector surface back to the focus, so as to impinge upon the stream for a second time, to further illuminate the particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.