Flat bed optical scanning beam deflection system
US4690485A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1985 |
| Grant date | Sep 1, 1987 |
| Priority date | — |
| Expiry date | Sep 20, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An optical flat bed deflection system comprises at least one rotating active reflective face (6) for deflecting a beam of parallel rays (1) along a deflection or scan line in a planar deflection plane (15), and an imaging optical system, i.e., an f.theta. lens arrangement, interposed between the active reflective face and the deflection plane. In order to reduce the disturbing influence of the bearing wobbling during rotation, on the image, a reverse-telescope like optical system is provided in front of the imaging optical system for enlarging one exit angle of the active reflective faces. In connection therewith, only two rotating active reflective faces are provided, each one of which is provided as a prism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.