Particle size measuring method and apparatus
US4387993A · kind A · utility
54Cited by
5References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1981 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Jun 25, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/47
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particle size measuring apparatus and method has a laser unit and optics that provide a central focused light area surrounded by an annular focused light area. Particles moving with fluid through the center of central focus light area cause the light to scatter. The scattered light is sensed and converted to readable signals indicative of particle size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.