Apparatus for measuring particle size distribution and method for analyzing particle size distribution
US6191853A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Sep 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/0216
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus and method for measuring a particle size distribution comprising a light source directing a laser light to particles which are dispersed into a solvent and which exhibit Brownian motion, a detector converting an interference light caused by Doppler-shifted scattered light by the particles into an electric detection signal, an operation unit obtaining an intermediate function by processing the detection signal, and a processing unit subjecting the intermediate function to an inverse problem and thereby calculating a particle size distribution. The apparatus includes a data selecting unit between the operation unit and the processing unit for selecting data from all data regions in the intermediate function at appropriate intervals and creating a data table used in an inverse problem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.