| 摘要 |
PROBLEM TO BE SOLVED: To provide an erecting equal-magnification lens array plate capable of eliminating stray light completely and allowing reduction of the size of an optical system. SOLUTION: The erecting equal-magnification lens array plate 10 includes a stack of a plurality of lens array plates built such that pairs of corresponding lenses form a coaxial lens system, where each lens array plate is formed with a plurality of convex lenses 18 on both surfaces of the plate. The plate receives light from a substantially straight light source facing one side of the plate, and the plate forms an erect equal-magnification image of the substantially straight light source on an image plane facing the other side of the plate. A light shielding member 16 operative to shield light not contributing to image formation is formed in the neighborhood of a position in the intermediate plane in the erecting equal-magnification lens array plate 10 where an inverted image of the substantially straight light source is formed. The main lens arrangement direction of the convex lenses 18 differs from the main scanning direction of the erecting equal-magnification lens array plate. COPYRIGHT: (C)2009,JPO&INPIT
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