Ellipsoid-conic radiation collector and method
US4189236A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1978 |
| Grant date | Feb 19, 1980 |
| Priority date | — |
| Expiry date | Mar 20, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/1459
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a radiation collector apparatus and method primarily for counting and analyzing a flow of dilute particulate material, such as blood cells, sperm cells and the like, through the use of light detection. The radiation collector apparatus comprises a reflector chamber having an ellipsoidal reflector surface with a pair of elipsoidal foci defining a first focus, f.sub.11, and second focus, f.sub.12, and a second reflector surface with a primary focus, f.sub.21, positioned at the same point as focus f.sub.12, and a secondary focus, f.sub.22. The second reflector surface has the configuration of one of the conic sections of revolution. In operation the radiation collector apparatus is provided with an intensifed beam of light and a stream of particulate material aligned to intersect the intensifed beam of light at focus f.sub.11. Detectable light signals, after two reflections, are received in a focused beam by a photosensitive detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.