作者: Daiki Yamanaka , Aiko Kubota
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摘要: A distance between a reference position and image of sheet is accurately measured without adding special device even when an attitude the not stable. An aspect present invention obtains data by reading surface formed with such as trim mark portion. height calculation portion calculates edge-blur amounts on from data. Furthermore, detects heights focus to for image, amount reflected light white solid Moreover, detection surface, basis result.