Optical scanning system
US5508837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 1995 |
| Grant date | Apr 16, 1996 |
| Priority date | — |
| Expiry date | May 10, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical scanning system wherein a moving cylinder supporting a segment of recording media on its inner surface is axially moved over a pair of fixed cylinders. A slit is provided between the fixed cylinders, and a light beam is radially scanned by the system through and along the slit to scan the surface of the supported segment of media as the moving cylinder moves in an axial direction over the fixed cylinders and across the slit. A pressure source provides air to the moving cylinder, with the supplied air expelled from an inner surface of the moving cylinder against the fixed cylinders to form an air bearing. Air is also expelled into the area between the fixed and moving cylinders to float the media therein during media advancement. A vacuum source is also provided to draw air through the moving cylinder from the area between the fixed and moving cylinders holding the media against the inner surface of the moving cylinder while the media is being scanned by the light beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.