Optical scanner with self contained standardization means
US5343296A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1993 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Feb 4, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/101
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for optically scanning and measuring the physical parameters of a sheet material by means which are fully enclosed within an air purged cross-machine box-beam structure to protect the radiation source, the radiation detector and the optics from the harsh machine environment. The apparatus may involve a single beam enclosing a combined source/detector module for reflection measurement or dual beams on opposite sides of the sheet for transmission measurement with one enclosing a source module and the other enclosing a detector module. Standardization means are also provided either in the module itself or as an extension of the beam. Means are also disclosed for sealing the opening in the beams through which the radiation passes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.