| 摘要 |
A scanning optical system with an improved scanning efficiency wherein a deflection space swept by a beam deflected by a deflecting surface of a deflecting device is divided into plural spatial zones, each of said divided spatial zones is provided with a transmission optical system for guiding the beam passing through each spatial zone to a scanned surface, and the beam scans said surface after passing through said transmission optical system is adapted to scan a same scan area whereby said same scan area is scanned plural times by the beam deflected by a single deflecting surface.
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