Polygon mirror with embedded yoke
US5373391A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Feb 25, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/121
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A polygon mirror is made up of a rotor including a ceramic ring, a yoke and a mirror surface formation member. The yoke and the mirror surface formation member are secured to an outer periphery of the ceramic ring. A radial dynamic pressure bearing is defined by an inner periphery of the ceramic ring and an outer periphery of the fixing shaft. A thrust dynamic pressure bearing is defined by both end surfaces of the ceramic ring and surfaces of a thrust plate fixedly secured to the stator and confronting both end surfaces of the ceramic ring. The ceramic ring, the yoke and the mirror surface formation member are integrated by the material making up the mirror surface formation member during the molding of the member to form the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.