Device for optically detecting sheet material
US6040901A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 1999 |
| Grant date | Mar 21, 2000 |
| Priority date | — |
| Expiry date | Jan 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/121
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The apparatus positions an area on the sheet material, the area being detected with high resolution. For this purpose a reflection device with a plurality of reflectors is provided for deflecting the light emitted by the area of the sheet material in the direction of a sheet material axis in the direction of a detector axis. An adjusting device is used to change the position of at least two reflectors for fixing the position of the area on the sheet material relative to the detection device. The reflectors are disposed so that the length of the optical path of the emitted light from the sheet material to the detection device is equal in the total area of the sheet material and at least in a plurality of positions of the reflection device adjustable by the adjusting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.