| 摘要 |
PROBLEM TO BE SOLVED: To realize an image forming device capable of attaining high-quality printing by providing an optical fiber array part where plural optical fibers are accurately arrayed. SOLUTION: The optical fiber (1) has a plate member (2) used at the time of assembling the optical fiber array part on its outer peripheral part, and the optical fiber array part (29) is equipped with an optical fiber array where the plate members are superposed to be in parallel with each other.
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