Apparatus and method for measuring particle size distribution by light scattering
US10837889B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 2012 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Sep 11, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/06113
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus (200) for measuring the particle-size distribution of a sample by light-scattering comprises a focusing optic (202) for producing a converging beam (203) generally along a propagation axis z. The apparatus comprises a mounting system which allows a dry sample cell (208A) and a wet sample cell (208B) to be mounted in the converging beam at different times and in respective planes which are mutually inclined so that in use of the apparatus respective positions (212, 214) at which transmitted light is focused for the two cells have a difference in displacement from the z axis that is less than for the case where the respective planes are substantially parallel. This allows use of a cheaper and less complex translation stage within the apparatus for mounting an optical detector for locating the two focus positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.