| 摘要 |
PROBLEM TO BE SOLVED: To provide a light beam scanning optical device capable of preventing image deterioration due to external vibration. SOLUTION: The light beam scanning optical device 1 which makes scans with a plurality of light beams emitted from light sources 4K, 4C, 4M and 4Y by a polygon mirror 7, reflects the respective light beams by a plurality of separate mirrors 10K, 10C, 10M and 10' and return mirrors 11K, 11C and 11M, and emits them from openings 13K, 13C, 13M and 13Y is characterized in that while reflecting members such as the separate mirrors 11K, 11C, 11M, etc., are provided in a first housing 2, imaging lenses 12K, 12C, 12M and 12Y are arranged in a second housing formed of a member different from the first housing 2 and the openings 13K, 13C, 13M and 13Y are formed. COPYRIGHT: (C)2004,JPO
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