Oscillation scan mirror with magnetic retaining force acting between the holder and shaft to prevent relative tilt between shaft and bearings
US7420721B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2005 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Aug 31, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An improved oscillation scan mirror assembly comprises a shaft, a holder having a bearing with a bearing surface supporting the holder on the shaft, a scan mirror secured to the holder. The holder and therefore the mirror are oscillatable around the shaft under an oscillating driving force, and bearing and the shaft is prevented from being tilt from each other. Preferably, a lateral retaining force is provided to constantly keep the bearing and the shaft in an aligned contact with each other. Since the relative tilting between bearing and the shaft is prevented, the vertical wobble or vibration of bearing, and therefore of the holder and the mirror, relative to the shaft is therefore suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.