| 摘要 |
An enclosure includes a first enclosure and a second enclosure. A deflector deflects a light emitted from a light source. A first optical system leads the light emitted from the light source to the deflector. A second optical system includes at least one optical element, and leads the light deflected by the deflector onto a surface to be scanned. The first enclosure holds the light source, the deflector, and the first optical system, and the second enclosure holds the at least one optical element included in the second optical system.
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