| 摘要 |
An optical scanning device includes a light source portion, a deflector, a first focus lens, a second focus lens, a first mirror group, and a second mirror group. The first mirror group includes: a first reflection mirror on which a first light beam having transmitted through a first focus lens is incident, the first reflection mirror reflecting the first light beam in a second direction away from a first scanned surface; and a second reflection mirror that reflects the reflected first light beam toward the first scanned surface. The second mirror group includes: a third reflection mirror on which a second light beam having transmitted through a second focus lens is incident, the third reflection mirror reflecting the second light beam in the first direction of approaching the second scanned surface; and a fourth reflection mirror that reflects the reflected second light beam toward the second scanned surface. |
| 主权项 |
1. An optical scanning device comprising:
a housing; a light source portion including a first light source and a second light source, the first light source emitting a first light beam, the second light source emitting a second light beam; a deflector whose rotation axis is inclined with respect to a first direction and a second direction, the first direction being opposite to the second direction, the deflector being configured to reflect the first light beam diagonally on a side of a third direction that is perpendicular to the first direction and the second direction, and on a side of the first direction, the deflector being configured to reflect the second light beam diagonally on a side of a fourth direction that is opposite to the third direction, and on a side of the second direction, such that the first light beam scans a first scanned surface and the second light beam scans a second scanned surface; a first focus lens disposed between the deflector and the first scanned surface and configured to focus the first light beam on the first scanned surface; a second focus lens disposed between the deflector and the second scanned surface and configured to focus the second light beam on the second scanned surface; a first mirror group disposed between the first focus lens and the first scanned surface and configured to reflect the first light beam to the first scanned surface; and a second mirror group disposed between the second focus lens and the second scanned surface and configured to reflect the second light beam to the second scanned surface, wherein the first mirror group includes:
a first reflection mirror on which the first light beam that has transmitted through the first focus lens is incident, the first reflection mirror being configured to reflect the first light beam in the second direction of separating away from the first scanned surface; anda second reflection mirror configured to reflect the first light beam reflected by the first reflection mirror, toward the first scanned surface, and the second mirror group includes:a third reflection mirror on which the second light beam that has transmitted through the second focus lens is incident, the third reflection mirror being configured to reflect the second light beam in the first direction of approaching the second scanned surface; anda fourth reflection mirror configured to reflect the second light beam reflected by the third reflection mirror, toward the second scanned surface. |
