Apparatus and method for measuring particle contamination
US5373365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1992 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Dec 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/86
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus, and a method for its use, for measuring particulate contamination on a web (10) in a web-cleaning system having means for contacting and removing particles from the web (12). The means for contacting and removing particles has a particle-collecting surface (14). A light source (16) is positioned to direct a light beam against the particle-collecting surface. A sensor (18) senses the intensity of light reflected from the particle collecting surface and generates a signal R.sub.0 representative of the initial reflected light intensity prior to particle collection by the particle collecting surface and a signal R.sub.f representative of the reflected light intensity after particle collection by the particle collecting surface, the difference between R.sub.0 and R.sub.f being a measure of the particulate contamination level on the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.