| 摘要 |
The scanner has a polygon mirror with light deflection faces for deflecting a light flux emitted from a light source. One optical system (2, 3, 4) introduces the flux into the mirror. Another optical system (7a, 7b) includes reflection unit for reflecting and introducing the flux onto a scanned face. The reflection unit comprises a reflectivity varying from center toward periphery in main scanning direction. The former optical system comprises a collimator lens (2), aperture stop (3) and cylindrical lens (4). The latter optical system comprises lens (7a, 7b). An independent claim is also included for an electrophotographic printer comprising an optical scanner. |
