| 摘要 |
PROBLEM TO BE SOLVED: To make fine adjustment of scanning lines corresponding to change or the like in the scanning line position in a subscanning direction, accurately with a simplified inexpensive structure and by a single adjusting action. SOLUTION: An adjustment of scanning line inclination of a long lens 5 is performed, by vertically driving, through a first adjuster 28, one end part 5-a in the long lens 5 on its center part 5-c as a fulcrum by the rotation of a first driving motor 25, and by vertically pressurizing the long lens 5. Also, the center part 5-c of the long lens 5 is made vertically drivable through a second adjuster 29 by the rotation of a second driving motor 26, thereby vertically driving respective adjusters 28, 29 by both driving motors 25, 26, and simultaneously pressurizing the center part 5-c and the one end part 5-a in the long lens 5. Consequently, the subscanning line position is adjusted by gradually moving the long lens 5 in the vertical direction while the initial bending condition is maintained. COPYRIGHT: (C)2007,JPO&INPIT
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