Optical scanning apparatus with improved structure for adjusting focus position
US5793408A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1995 |
| Grant date | Aug 11, 1998 |
| Priority date | — |
| Expiry date | Nov 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B26/128
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An optical scanning apparatus which includes a housing, an optical source which emits an optical beam, a deflector which deflects an optical beam from the optical source, a focusing lens which focuses the optical beam from the deflector, and plural mirrors which reflect the optical beam from the deflector. The plural mirrors include a first mirror which reflects the optical beam from the deflector, a third mirror which reflects the optical beam from the first mirror, and a second mirror which reflects the optical beam from the third mirror. The optical beam is focused upon a photoconductive element by the focusing lens through the plural mirrors on a scanning surface, and at least one of the first mirror and the third mirror is pivotally supported to be adjusted in a sub-scanning direction. Further, the second mirror is slidably supported to be adjusted in a direction normal to a reflecting surface of the second mirror. The arrangement provides an advantageous structure by which a focus position is easily adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.