Optical deflector, optical scanner, and image forming apparatus
US7602540B2 · kind B2 · utility
17Cited by
10References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 12, 2009 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Feb 12, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/1135
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical deflector includes a rotary body including a polygon mirror; a rotation shaft fixed to the rotary body; a bearing unit rotatably supporting the rotation shaft; and a board to which the bearing unit is fixed. Where P [rpm] is the number of revolutions of the rotary body, l [m] is a distance between a center of gravity of the rotary body and the board, m [kg] is mass of the rotary body, r [m] is a radius of the rotation shaft, E [Pa] is Young's modulus of the rotation shaft, and t [mm] is a thickness of the board, the following inequalities are satisfied:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.