| 摘要 |
A rod lens array for optical printer head includes a plurality of rod lenses arranged cyclically in a predetermined direction. The rod lenses are fixed by filling a opaque substance into the gaps separating the respective rod lenses and sandwiching the rod lenses and the opaque substance with a pair of side panels. The side panels have a cyclical structure resulting in undulations at least on their surface facing the rod lenses, and the pitch of the beat generated by the cycle or arrangement of the plurality of rod lenses and the cyclical structure of the side panels is not greater that 0.6 mm or substantially infinite.
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