| 摘要 |
PROBLEM TO BE SOLVED: To provide a light source device in which the relative position of a first image formation optical system and a first image formation optical system support member is stably kept even when such environmental conditions as temperature and moisture vary, and to obtain a highly accurate optical scanning device and an image forming device in which the light source device is used. SOLUTION: The first image formation optical system support member 11 is provided with a V-shaped groove to be made abut on the outer diameter part of the first image formation optical system 10. The first image formation optical system 10 is placed on the V-shaped groove and is supported by being pressurized with a support means 12. When the angle of the V-shaped groove is defined asθ, the conditional expression of (60deg≤θ≤105deg) is satisfied. When the angleθis too small, the first image formation optical system 10 is liable to fall down when the system is assembled. When theθis too large, the first image formation optical system 10 is liable to turn. COPYRIGHT: (C)2004,JPO
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