In situ particle size measuring device
US4890920A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1987 |
| Grant date | Jan 2, 1990 |
| Priority date | — |
| Expiry date | Apr 23, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A particle size measuring device for effecting with regard to particles present in a fluid substance the simultaneous measurement in situ of two parameters thereof; namely, particle size distribution and volumetric density. The particle size measuring device comprises a laser light source (14), a laser light conveying device (40), a collimator, a first focusing device (64), a defined sample path (74) through which particles to be measured pass, a second focusing device (78) and a detector device (82). The mode of operation of the particle size measuring device is such that the laser light from the laser light source (14) is conveyed by means of the laser light conveying device (40) to the collimator. After being collimated the laser light is transmitted to the first focusing device (64) whereby the laser light is focused and is then made to pass across the sample path (74). In the course of passing across the sample path (74), the laser light is scattered by the particles that are present in the sample path (74). Both scattered and collimated light is collected by the second focusing device (78) and the focused thereby on to the detector device (82) such that the intensity distribu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.